Trends and age-period-cohort effect on dental caries prevalence from 2008 to 2019 among Brazilian preschoolers

Abstract This study aimed to evaluate trends in the prevalence of dental caries in preschool children and associated factors considering different time variations. This is a time series study performed using data from three cross-sectional studies with pre-school children from southern Brazil in 2008, 2013 and 2019. This children group was born between the years of 2003 to 2018. Dental caries was evaluated by decayed, missing and filled deciduous teeth (dmft index). Demographic, socioeconomic, behavioural and psychosocial variables were also collected. Chi-square test for trends and a hierarchical age-period-cohort (HAPC) analysis using multilevel Poisson regression model for testing the associations between predictor variables and dental caries experience were used. A total of 1,644 pre-school children participated in all surveys. There was a significant difference in caries experience considering all APC effects. The prevalence of dental caries was 25.0% in 2008, 16.3% in 2013, and 19.4% in 2019 (p < 0.01) and no statistical difference was observed. An age effect showed that older children were more likely to experience dental caries. Considering the cohort effect, there is a significant difference between the generations, mainly between 2003 and 2018. Household income, use of dental services, and parent's perception of child oral health were associated with dental caries experience no matter the time variation. Despite recent declines in dental caries prevalence among preschool children, caries levels increased with age and social inequalities persisted through the years, indicating a need of reviewing the policies to reduce the burden of this oral disease.

Relação entre temperatura do ar e incidência de dengue: estudo de séries temporais em Minas Gerais, Brasil (2010-2019) / Relationship between air temperature and dengue incidence: time series study in Minas Gerais, Brazil (2010-2019) / Relación entre la temperatura del aire y la incidencia del dengue: estudio de series temporales en Minas Gerais, Brasil (2010-2019)

Resumo A temperatura do ar é um fator climático que afeta a incidência da dengue, com efeitos variando conforme o tempo e o espaço. Investigamos a relação entre a temperatura mínima do ar e a incidência da doença em Minas Gerais, Brasil, e avaliamos a influência de variáveis socioeconômicas e geográficas nessa relação, calculando-se o risco relativo (RR). Este é um estudo de série temporal com análise conduzida em três etapas distintas: modelagem por uso de distributed lag non-linear model (modelos não-lineares distributivos com defasagem), metanálise dos modelos obtidos e metarregressão com dados geográficos e socioeconômicos. A temperatura mínima foi um fator de proteção quando em temperaturas frias extremas (RR = 0,65; IC95%: 0,56-0,76) e moderadas (RR = 0,71; IC95%: 0,64-0,79) e fator de risco em temperaturas de calor moderado (RR = 1,15; IC95%: 1,07-1,24), mas não em extremo (RR = 1,1; IC95%: 0,99-1,22). A heterogeneidade dos modelos foi elevada (I2 = 60%) e essa medida não foi alterada em metarregressão. Temperaturas frias moderadas e extremas causam efeito protetivo, enquanto moderadas quentes aumentam o risco. No entanto, a temperatura mínima do ar não explica nem a variabilidade da região, nem mesmo com as outras variáveis em metarregressão.

Abstract Air temperature is a climatic factor that affects the incidence of dengue, with effects varying according to time and space. We investigated the relationship between minimum air temperature and dengue incidence in Minas Gerais, Brazil, and evaluated the influence of socioeconomic and geographic variables on this relationship. This is a time series study with analysis conducted in three distinct stages: modeling using a distributed lag non-linear model, meta-analysis of models obtained, and meta-regression with geographic and socioeconomic data. Minimum temperature was a protective factor at extreme cold temperatures (RR = 0.65; 95%CI: 0.56-0.76) and moderate cold temperatures (RR = 0.71; 95%CI: 0.64-0.79), and a risk factor at moderate hot temperatures (RR = 1.15; 95%CI: 1.07-1.24), but not at extreme hot temperatures (RR = 1.1; 95%CI: 0.99-1.22). Heterogeneity of the models was high (I2 = 60%), which was also observed in meta-regression. Moderate and extreme cold temperatures have a protective effect, while moderate hot temperatures increase the risk. However, minimum air temperature does not explain the variability in the region, not even with the other variables in meta-regression.

Resumen La temperatura del aire es un factor climático que afecta la incidencia del dengue, con efectos que varían según el tiempo y el territorio. Investigamos la relación entre la temperatura mínima del aire y la incidencia de la enfermedad en Minas Gerais, Brasil, y evaluamos la influencia de variables socioeconómicas y geográficas en esta relación. Se trata de un estudio de serie temporal cuyo análisis se realiza en tres etapas distintas: modelación mediante el uso de distributed lag non-linear model (modelos distributivos no lineales con retraso), metaanálisis de los modelos obtenidos y metarregresión con datos geográficos y socioeconómicos. La temperatura mínima fue un factor de protección ante temperaturas extremadamente frías (RR = 0,65; IC95%: 0,56-0,76) y moderadas (RR = 0,71; IC95%: 0,64-0,79) y factor de riesgo en temperaturas de calor moderado (RR = 1,15; IC95%: 1,07-1,24), pero no en extremo (RR = 1,1; IC95%: 0,99-1,22). La heterogeneidad de los modelos fue alta (I2 = 60%), y esta medida no se modificó en la metarregresión. Las temperaturas frías moderadas y extremas tienen un efecto protector, mientras que las temperaturas moderadamente altas aumentan el riesgo. Sin embargo, la temperatura mínima del aire no explica la variabilidad de la región, ni siquiera con las demás variables en metarregresión.

Door-to-needle time for intravenous thrombolysis in acute ischemic stroke / 国际脑血管病杂志

Intravenous thrombolysis is an effective treatment for acute ischemic stroke, but its benefits are time-dependent. The time from onset to intravenous thrombolysis is divided into onset-to-door time (ODT) and door-to-needle time (DNT). The former reflects pre-hospital delay, while the latter reflects in-hospital delay and can be controlled by stroke improvement plan. This article reviews the influence of DNT on clinical outcomes, the influencing factors of DNT and the stroke improvement plan to shorten DNT.

Infant mortality in the municipality of São Paulo: trend and social inequality (2006-2019) / Mortalidade infantil no município de São Paulo: tendência e desigualdade social (2006-2019)

ABSTRACT OBJECTIVE Considering the published evidence on the impact of recent economic crises and the implementation of fiscal austerity policies in Brazil on various health indicators, this study aims to analyze how the trend and socio-spatial inequality of infant mortality behaved in the municipality of São Paulo from 2006 to 2019. METHODS This is an ecological study with a temporal trend analysis that was developed in municipality of São Paulo, using three residence area strata differentiated according to their social vulnerability following the 2010 São Paulo Social Vulnerability Index. Infant mortality rate, as well as neonatal, and post-neonatal mortality rates, were calculated for each social vulnerability stratum, each year in the period, and for the first and last three triennia. Temporal trends were analyzed by the Prais-Winsten regression model and inequality magnitude, by rate ratios. RESULTS We found a decline in infant mortality rate and its components from 2006 to 2015, greater in the stratum with low social vulnerability and in the post-neonatal period when compared to the neonatal one. This decline ended in 2015, stagnating in the next period (2016-2019). Our analysis of infant mortality inequality across social vulnerability stratum showed a significant increase from the initial to the final triennia in the analyzed period; rate ratios increased from 1.36 to 1.48 in the high stratum (compared to the low social vulnerability stratum), and from 1.19 to 1.32 between the medium and low social vulnerability strata. CONCLUSIONS The observed stagnation of infant mortality rate decline in 2015 and the increase in socio-spatial inequality point to the urgent need to reformulate current public policies to reverse this situation and reduce inequalities in the risk of infant death.

RESUMO OBJETIVO Considerando as evidências publicadas sobre o impacto de crises econômicas e da implementação de políticas de austeridade fiscal em vários indicadores de saúde, e a ocorrência recente desses eventos no Brasil, o objetivo deste estudo foi analisar o comportamento da tendência e da desigualdade socioespacial da mortalidade infantil no município de São Paulo, entre 2006 e 2019. MÉTODOS Trata-se de estudo ecológico de análise de tendência temporal, desenvolvido no município de São Paulo e em três estratos de áreas de residência, diferenciadas segundo nível de vulnerabilidade social, a partir do Índice Paulista de Vulnerabilidade Social de 2010. Calcularam-se as taxas de mortalidade infantil, neonatal e pós-neonatal para cada um dos estratos de vulnerabilidade social, para cada ano do período e para o primeiro e o último triênios. A tendência temporal foi analisada com o modelo de regressão de Prais-Winsten e a magnitude da desigualdade avaliada pelas razões de taxas. RESULTADOS O declínio das taxas de mortalidade infantil e de seus componentes, observado entre 2006 e 2015, que foi mais elevado no estrato de baixa vulnerabilidade social e no período pós-neonatal em comparação ao neonatal, foi interrompido em 2015, com estagnação das taxas no período subsequente (2016-2019). A análise da desigualdade da mortalidade infantil entre os estratos de vulnerabilidade social revelou aumento significativo entre os triênios inicial e final do período analisado; as razões de taxas cresceram de 1,36 para 1,48 entre o estrato de alta em relação ao de baixa vulnerabilidade social e de 1,19 para 1,32 entre o de média e de baixa vulnerabilidade social. CONCLUSÕES O estancamento do declínio da taxas de mortalidade infantil em 2015 e o aumento da desigualdade socioespacial observados apontam para a necessidade premente de reformulação das políticas públicas vigentes para reversão desse quadro, visando reduzir a iniquidade presente no risco de morte infantil.

Final irrigation protocols can be used to promote stable long-term bond strength of AH Plus to dentin

Abstract Irrigation solutions might affect dentin surface characteristics and, consequently, endodontic sealers adhesion. Objective This study analyzed the effect of different final irrigation protocols on push-out bond strength (BS) of AH Plus to dentin seven days and 20 months after obturation. Scanning electron micrographs were obtained from the dentin surface of one sample/group after final irrigation. Methodology Canals of bovine incisors were instrumented and received final irrigation with (n=21): G1 - 2.5% sodium hypochlorite (NaOCl) + distilled water; G2 - 2.5% NaOCl + 17% EDTA; G3 - 2.5% NaOCl + 17% EDTA + 2.5% NaOCl; G4 - 2.5% NaOCl + 17% EDTA + 2% chlorhexidine (CHX); G5 - mixture 5% NaOCl + 18% etidronate (HEDP); and G6 - mixture 5% NaOCl + 10% tetrasodium EDTA (Na4EDTA). After irrigation, one root/group was split and images were obtained by scanning electron microscopy (SEM). The other 20 roots/group were filled with only AH Plus sealer. Three slices/root were used for push-out assessment seven days and 20 months after obturation. One-way analysis of variance and Tukey (α<0.05) were used to compare the results among experimental groups, and unpaired t-test (α<0.05) was used to compare the results of the same group over time. Results The photomicrographs showed that, excepting G1, all groups completely removed the smear layer from the samples. In G2 and G4, the opening of the dentin tubules enlarged. In G3, erosion was observed in the peritubular and intertubular dentin. Values of the BS in the seven days were G2=G3=G4=G5>G6=G1 and in the 20 months were G3=G5>G6=G4>G1=G2. G3, G5, and G6 presented values of BS in 20 months similar to the values of seven days (P>0.05). Conclusions The final irrigation protocols tested produced dentin surfaces with different characteristics. Only G3 and G5 presented high BS values that were stable over time.

Clinical features and outcomes at discharge of outborn very preterm infants of different ages after interhospital transfer / 中华围产医学杂志

Objective:To analyze the distribution of ages at the interhospital transfer of outborn very preterm infants in China and to compare their perinatal characteristics and outcomes at discharge and neonatal intensive care unit (NICU) treatment.Methods:A total of 3 405 outborn very premature infants with a gestational age of 24-31 +6 weeks who were transferred to the NICUs of the Chinese Neonatal Network (CHNN) in 2019 were included in this retrospective study. According to the age at transfer, they were divided into three groups: early transfer (≤1 d), delayed transfer (>1-7 d) and late transfer (>7 d) groups. Analysis of variance, t-test, Chi-square test (Bonferroni correction), Kruskal-Wallis test and Wilcoxon rank-sum test were used to compare the general clinical condition, treatment, and outcomes at discharge among the three groups. Results:The median gestational age was 29.7 weeks (28.3-31.0 weeks) and the average birth weight was (1 321.0 ± 316.5) g for these 3 405 infants. There were 2 031 patients (59.6%) in the early transfer group, 406 (11.9%) in the delayed transfer group and 968 (28.4%) in the late transfer group. Infants who received continuous positive airway pressure ventilation and tracheal intubation in the delivery room accounted for 8.4% (237/2 806) and 32.9% (924/2 805), respectively. A total of 62.7% (1 569/2 504) of the mothers received antenatal glucocorticoid therapy and the ratio in the early transfer group was 68.7% (1 121/1 631), which was higher than that in the delayed transfer group [56.1% (152/271), χ2=16.78, P<0.017] and the late transfer group [49.2% (296/602), χ2=72.56, P<0.017]. The total mortality rate of very premature infants was 12.7% (431/3 405), and the mortality rates in the early, delayed and late transfer groups were 12.4% (252/2 031), 16.3% (66/406) and 11.7% (113/968), respectively ( χ2=5.72, P=0.057). The incidences of severe intraventricular hemorrhage, late-onset sepsis, necrotizing enterocolitis, and bronchopulmonary dysplasia at the corrected gestational age of 36 weeks or discharge were all higher in the delayed and late transfer groups than in the early transfer group, respectively. The incidences of retinopathy of prematurity, retinopathy of prematurity requiring treatment and bronchopulmonary dysplasia at the corrected gestational age of 36 weeks or discharge in the late transfer group were significantly higher than that in the delayed transfer group (Bonferroni correction, all P<0.017). In the late transfer group, the median age of very premature infants at discharge was 66.0 d (51.0-86.0 d), and the corrected gestational age at discharge was 38.9 weeks (37.1-41.2 weeks), and both were greater than those in the early transfer [48.0 d (37.0-64.0 d), Z=260.83; 36.9 weeks (35.7-38.3 weeks), Z=294.32] and delayed transfer groups [52.0 d (41.0-64.0 d), Z=81.49; 37.4 weeks (36.1-38.7 weeks), Z=75.97] (all P<0.017). Conclusions:Many very premature infants need to be transferred to higher-level hospitals after birth. The later the very premature infants are transferred, the higher the incidence of complications will be. It is suggested that intrauterine or early postnatal transport may improve the prognosis of very premature infants.

Effects of timing of chemotherapy after breast cancer surgery on patient's immune function and quality of life / 中国基层医药

Objective:To investigate the effects of the timing of chemotherapy after breast cancer surgery on patient's immune function and quality of life.Methods:A total of 100 patients who underwent modified radical mastectomy for breast cancer from January 2017 to January 2019 in Jining No. 1 People's Hospital were included in this study. These patients were randomly divided into a control group and an early chemotherapy group ( n = 50/group). Patients in the control group underwent chemotherapy 4-6 weeks after surgery. Patients in the early chemotherapy group received chemotherapy 2 weeks after surgery. The chemotherapy regimens were the same in the two groups. The levels of CD 4+, CD 8+, CD 4+/CD 8+, immunoglobulin A (IgA), and immunoglobulin G (IgG) were measured before and after chemotherapy in each group. Chemotherapy-related reverse reactions and infections were recorded. The quality of life was evaluated in each group at the last follow-up. Results:Before chemotherapy, there were no significant differences in CD 4+, CD 8+, CD 4+/CD 8+, IgA, and IgG levels between the two groups (all P > 0.05). After chemotherapy, CD 4+ and CD 4+/CD 8+ levels in the early chemotherapy group were (51.76 ± 5.21)% and (2.00 ± 0.25), respectively, which were significantly higher than (48.21 ± 4.78)% and (1.70 ± 0.21) in the control group ( t = 3.55, 4.98, both P < 0.05). After chemotherapy, the CD 8+ level in the early chemotherapy group was (25.93±2.43)%, which was significantly lower than (28.29 ± 2.31)% in the control group ( t = 6.50, P < 0.05). Serum IgA and IgG levels in the early chemotherapy group were (3.24 ± 0.38) g/L and (9.27 ± 1.04) g/L, respectively, which were significantly higher than (2.75 ± 0.37) g/L and (8.43 ± 0.97) g/L in the control group ( t = 6.53, 4.18, both P < 0.05). During chemotherapy, there was no significant difference in the incidence of reverse reactions between the two groups (all P > 0.05). The incidence of infections was significantly lower in the early chemotherapy group than the control group ( P < 0.05). At the last follow-up, generic quality of life inventory-74 scores in the early chemotherapy group were significantly higher than those in the control group (all P < 0.05). Conclusion:Early chemotherapy can markedly reduce the effects of chemotherapy on the immune function of patients after breast cancer surgery, decrease the incidence of infections, and improve quality of life.

Modelos para previsão das taxas de incidência e mortalidade do câncer do colo do útero / Models for predicting cervical cancer incidence and mortality rates / Modelos para predecir las tasas de incidencia y mortalidad del cáncer del cuello uterino

Objetivo:analisar e prever as taxasde incidência e mortalidade do câncer do colo do útero, utilizando modelos de séries temporais. Método:estudo ecológico de uma série histórica, realizado na Grande Cuiabá. Os dados de incidência foram referentes ao registro de câncer de base populacional(2000 a 2012) e os de mortalidade (1981 a 2018), obtidos no Sistema de Informação sobre Mortalidade. Os dados foram analisados pelos modelos Arima e Holt. Resultados:na série da taxa de incidência do carcinoma in situ, o modelo adequado foi AR (1), cujasprojeções estimadas (2013-2014) flutuaram entre 15,54 e 16,45 por 100 mil mulheres. Na série da taxa do colo do útero invasor (modelo Holt), as previsões (2013-2014) foram entre 11,28 a 8,9 por 100 mil mulheres. Na taxa de mortalidade, o modelo satisfatório foi ARMA (1,1), cujas previsões (2019-2020) flutuaram entre 9,46 e 9,62 por 100 mil mulheres. Conclusão:nos três casos, as taxas previstas apresentaram níveis próximos dos observados, indicando que os modelos permitiram estimar e prever, de maneira adequada. Também foi possível observar um discreto aumento no câncer in situe um declínio na incidência do câncer invasor. Na mortalidade evidenciou uma estabilidade nos resultados e nas previsões.

Objective:to analyze and predict cervical cancer incidence and mortality rates, using time series models. Method:ecological study of a historical series, with a secondary base, carried out in Greater Cuiabá. The incidence data referred to the population based cancer registry (2000 to 2012), and mortality data (1981 to 2018), obtained from the Mortality Information System. Data were analyzed by Arima and Holt models. Results:in the series of incidence rateof carcinoma in situ, the appropriate model was AR (1), whose estimated projections (2013-2014) fluctuated between 15,54 and 16,45 per 100.000 women. In the invasive cervix rate series (Holt model) the forecasts (2013-2014), with values between 11,28 to 8,9 per 100.000 women. In the mortality rate, a satisfactory model was ARMA (1,1), whose forecasts (2019-2020) fluctuated between 9,46 and 9,62 per 100.000 women. Conclusion:in the three cases, the predicted rates showed levels close to those observed, indicating that the models allowed estimating and predicting adequately. It was also possible to observe a slight increase in in situ cancer and a decline in the incidence of invasive cancer, in mortality, showing stability in results and predictions.

Objetivo: analizar y predecir tasas de incidencia y mortalidad por cáncer cervicouterino mediante modelos de series temporales. Método: estudio ecológico de una serie histórica, con base secundaria, realizado en la Grande Cuiabá. Los datos de incidencia se refierem a registro de cáncer de base poblacional (2000 a 2012), y los de mortalidad (1981 a 2018), obtenidos del Sistema de Información de Mortalidad. Los datos fueron analizados por los modelos de Arima y Holt. Resultados:en la tasa de incidencia de carcinoma in situ, el modelo adecuado fue AR(1), cuyas proyecciones estimadas (2013-2014) oscilarón entre 15,54 y 16,45 por 100.000 mujeres. En la serie de tasa del cuello uterino invasivo (modelo de Holt) las previsiones (2013-2014), con valores entre 11,28 y 8,9 por 100.000 mujeres. En la tasa de mortalidad, el modelo satisfactorio fue ARMA(1,1), cuyas previsiones (2019-2020) oscilaron entre 9,46 y 9,62 por 100.000 mujeres. Conclusión:en los tres casos, las tasas pronosticadas mostrarón niveles proximos a los observados, indicando que los modelos permitierón estimar y predecir adecuadamente. También fue posible observar un ligero aumento en el cáncer in situ y una disminución en la incidencia del cáncer invasor. En la mortalidade mostrando estabilidad en los resultados y predicciones.

Outcomes of Arteriotomy Closure Technique for Carotid Endarterectomy: Bovine Pericardial Patch Closure versus Primary Closure

ABSTRACT Introduction: The aim of our study was to compare the primary closure (PRC) and patch angioplasty closure (PAC) of carotid artery following carotid endarterectomy (CEA). Methods: Data of patients who underwent CEA in the period from January 2005 to June 2020 were reviewed through files. Demographic characteristics, information about the operation, and postoperative follow-up outcomes of the patients were compared. Results: Of the 144 CEA cases included in the study, PRC and PAC were applied to 62 (43.7%) and 82 (56.3%) patients, respectively, for the carotid artery closure. Duration of surgery and carotid artery clamping time were not different between the PRC and PAC groups (106.73±17.13 minutes vs. 110.48±20.67 minutes, P=0.635; 24.25±11.56 minutes vs. 25.19±8.99 minutes, P=0.351, respectively). Postoperative respiratory impairment was more common in the PRC group (P=0.012); however, nerve injuries (P=0.254), surgical wound hematomas (P=0.605), surgical site infections (P=0.679), and mortality (P=0.812) were not significantly different between the groups. During the mean patient follow-up time of 26.13±19.32 months, restenosis was more common in the PRC group than in the PAC group (n=26, 41.9% vs. n=4, 4.9%, respectively; P=0.003). Frequencies of stroke (n=4, 2.8% vs. n=2, 2.4%, respectively; P=0.679), transient ischemic attacks (n=2, 1.4% vs. n=0, 0%, respectively; P=0.431), and mortality (n=4, 6.5% vs. n=4, 4.9%, respectively; P=0.580) were not significantly different between the PRC and PAC groups. Conclusion: We are of the opinion that the PAC method is effective and safe for carotid artery closure in patients undergoing CEA.

Spontaneous closure of a macular hole in an unusually long time after primary vitrectomy / Fechamento espontâneo de buraco macular em um tempo excepcionalmente longo após vitrectomia primária

ABSTRACT We report the case of a 68-year-old man who presented to our outpatient clinic for routine examination. Fifteen months before, he had undergone combined cataract and idiopathic full-thickness macular hole surgery in his right eye at another institution. In the present evaluation, the best-corrected visual acuity in his right eye was counting fingers. Fundus examination evidenced an idiopathic full-thickness macular hole in that eye, which was confirmed on spectral domain optical coherence tomography. A new surgery was offered, but the patient declined. Twenty-one months after his first consultation with us (36 months after the surgery), spectral domain optical coherence tomography revealed spontaneous closure of the idiopathic full-thickness macular hole, with a gap at the foveal ellipsoid zone. At the final visit, 22 months after the closure of the idiopathic full-thickness macular hole, the patient's best-corrected visual acuity was 20/25, and the gap at the ellipsoid zone had decreased.

RESUMO Este é o relato do caso de um homem de 68 anos que procurou nosso ambulatório para exames de rotina. Quinze meses antes, ele havia se submetido a uma cirurgia conjunta de catarata e buraco macular idiopático de espessura total em seu olho direito, em outra instituição. Durante a consulta em nosso ambulatório, a melhor acuidade visual corrigida no olho direito era de contagem de dedos. O exame do fundo evidenciou um buraco macular idiopático de espessura total naquele olho, o que foi confirmado por uma tomografia de coerência óptica de domínio espectral. Uma nova cirurgia foi oferecida, mas o paciente recusou. Vinte e um meses após sua primeira consulta (36 meses após a cirurgia), a tomografia de coerência óptica de domínio espectral revelou o fechamento espontâneo do buraco macular idiopático de espessura total, com uma lacuna na zona elipsoide foveal. Na última consulta, 22 meses após o fechamento do buraco macular idiopático de espessura total, a melhor acuidade visual corrigida foi de 20/25 e a lacuna na zona elipsoide havia diminuído.

Estudio AHORA 6: Angioplastia coronaria con alta HOspitalaria RÁpida en 6 horas / Early Hospital Discharge (Within Six Hours) for Patients Undergoing Coronary Angioplasty

RESUMEN Introducción: Es de práctica habitual la internación durante 24 h en los pacientes (P) intervenidos con una angioplastia coronaria (ATC) programada. Experiencias previas proponen el alta post ATC en el mismo día en P seleccionados. Material y métodos: Estudio prospectivo, aleatorizado, controlado, simple ciego. Se incluyeron P de 18 a 75 años candidatos a una ATC programada por acceso radial, con posibilidad de acceder al sistema de emergencias en menos de 40 minutos. Se excluyeron los P con fracción de eyección ventricular izquierda < 30%, Creatinina > 1,5 mg/dL, insuficiencia cardíaca, enfermedad pulmonar obstructiva crónica, diabetes descompensada, o anatomía coronaria muy compleja. Se dividió a la población en dos grupos (G). G 1: alta en 6 horas. G2: alta al día siguiente. Punto final primario: muerte o necesidad de rehospitalización dentro de las 24 h de realizado el procedimiento. Se realizó seguimiento telefónico la noche del procedimiento y a la mañana siguiente, presencial a las 48 h, y telefónico al mes, seis meses y un año. Resultados: Se adjudicaron aleatoriamente 80 P. Seis P (7,5%) presentaron criterios de exclusión durante el procedimiento. No se produjo ninguna muerte ni evento cardiovascular mayor en ninguno de ambos grupos. Al año de seguimiento se detectó 3,75% de reestenosis intra stent. Se detectó elevación de troponina en 20 P (25%) de los cuales 4 habían sido excluidos por complicaciones durante la ATC. En los restantes 16, la elevación de la troponina no tuvo repercusión clínica. Conclusión: En una población de pacientes entre 55 y 75 años, en su mayoría de género masculino, con alta prevalencia de infarto de miocardio previo, y depresión de la función ventricular, pudo realizarse una angioplastia programada por acceso radial con alta en 6 horas, con un adecuado margen de seguridad.

ABSTRACT Background: 24-hour hospitalization is common practice in patients (P) who underwent scheduled coronary angioplasty (PCI). Previous experiences propose same-day discharge in selected P. Methods: Prospective, comparative, randomized, single-blind study. P aged 18 to 75 years were included as candidates for a scheduled radial-access PCI with the possibility of accessing the emergency system in less than 40 minutes. P with left ventricular ejection fraction <30%, creatinine >1.5 mg/dL, heart failure, chronic obstructive pulmonary disease, decompensated diabetes or very complex coronary anatomy were excluded. The population was divided in two groups (G). G 1: same-day discharge in 6 hours. G2: discharge the next day. Primary endpoint: death or need for rehospitalization within 24 hours of the procedure. Follow-up was carried out by phone the night of the procedure and the next morning, in person at 48 hours, and by telephone after a month, six months and a year. Continuous variables were expressed as median and their respective interquartile range, and qualitative variables as percentages. Results: 80 P were randomized. Six P (7.5%) presented exclusion criteria during the procedure. There were no deaths or major cardiovascular events in either groups. At one year of follow-up, 3.75% of in-stent restenosis was detected. Troponin elevation was detected in 20 P (25%); 4 were P excluded due to complications during PCI, in the remaining 16 it had no clinical repercussion. Conclusion: In a population of patients between 55 and 75 years old, mostly male, with a high prevalence of previous myocardial infarction, and ventricular function depression, a scheduled radial-access PCI could be performed with same day discharge in 6 hours, with an adequate safety margin.

Orthodontists' preferences in the use and timing of appliances for the correction of malocclusions in growing patients / Preferencias de los ortodoncistas en el uso y momento oportuno de uso de aparatos para la corrección de maloclusiones en pacientes en crecimiento

Objective: To evaluate orthodontists' preferences in the use and timing of appliances for the correction of Class II and Class III malocclusions in growing patients and the sociodemographic factors that influence these preferences. Material and Methods: Active members of the Colombian Orthodontics Society (SCO) were invited to complete a previously validated survey on the use of Class II and Class III correctors in growing patients. Results: 180 orthodontists responded (80 male, 100 female). The appliances used most frequently in the treatment of Class II malocclusion were Planas indirect tracks (32.78%) and Twin-blocks (30.56%). Facemasks (62.22%) and Progenie plates (25%) were the most prevalent appliances used in the treatment of Class III malocclusions. Regarding treatment timing, 52% of the orthodontists stated that Class II malocclusions must be treated during late mixed dentition or early permanent dentition, 42% stated that treatment for Class III malocclusions should occur during early mixed dentition. Appliance use and treatment timing were significantly associated with sex (p= 0.034), years of practice (p= 0.025), and area of work (private clinics or public institutions), (p= 0.039). Conclusion: Twin-blocks and Facemask appliances were the preferred appliances for Class II and Class III treatment, respectively, in growing patients. Most of the orthodontists believed that Class II malocclusions must be treated during late mixed dentition and that Class III malocclusions must be treated during early mixed dentition. Sociodemographic variables are related factors that influence orthodontists' preferences in the use of these appliances.

Objetivo: Evaluar las preferencias de los ortodoncistas en el uso y momento oportuno de uso de aparatología para la corrección de maloclusiones Clase II y Clase III en pacientes en crecimiento y los factores sociodemográficos que influyen en estas preferencias. Material y Métodos: Se invitó a miembros activos de la Sociedad Colombiana de Ortodoncia (SCO) a completar una encuesta previamente validada, sobre el uso de correctores para Clase II y Clase III en pacientes en crecimiento. Resultados: Respondieron un total de 180 ortodoncistas (80 hombres, 100 mujeres). La aparatología más utilizada en el tratamiento de las maloclusiones de Clase II fueron pistas indirectas de Planas (32,78%) y bloques gemelos (30,56%). La máscara facial (62,22%) y las placas progenie (25%) fueron los aparatos más utilizados en el tratamiento de las maloclusiones de Clase III. En cuanto al momento oportuno del tratamiento, el 52% de los ortodoncistas afirmó que las maloclusiones de Clase II deben tratarse durante la dentición mixta tardía o la dentición permanente temprana, el 42% afirmó que el tratamiento para las maloclusiones de Clase III debe ocurrir durante la dentición mixta temprana. El uso de aparatos y el momento oportuno del tratamiento se asociaron significativamente con el sexo (p= 0,034), los años de práctica (p= 0,025) y el área de trabajo (clínicas privadas o instituciones públicas) (p= 0,039). Conclusión: Los aparatos bloques gemelos y la máscara facial fueron los preferidos para el tratamiento de Clase II y Clase III, respectivamente, en pacientes en crecimiento. La mayoría de los ortodoncistas consideran que las maloclusiones de Clase II deben tratarse durante la dentición mixta tardía y que las maloclusiones de Clase III deben tratarse durante la dentición mixta temprana. Las variables sociodemográficas son factores relacionados que influyen en las preferencias de los ortodoncistas en el uso de estos aparatos.

Efficacy of internal fixation with common intramedullary nail versus bone cement reinforced antirotation intramedullary nail in the treatment of femoral intertrochanteric fracture / 中国基层医药

Objective:To investigate the efficacy of internal fixation with common intramedullary nail versus bone cement reinforced antirotation intramedullary nail in the treatment of femoral intertrochanteric fracture. Methods:A total of 106 patients with femoral trochanteric fractures who were surgically treated in Weihaiwei People's Hospital from January 2018 to January 2019 were selected and divided into a control group and an observation group with 53 patients in each group. The control group received internal fixation with common intramedullary nails. The observation group was fixed with bone cement reinforced anti-rotation intramedullary nails. The therapeutic effects were compared between the two groups.Results:There were no significant differences in the amount of blood loss, postoperative Visual Analogue Scale score, amount of fluid drainage, postoperative time to get out of bed, and postoperative hospital stay between the two groups ( t = 1.33, 0.19, 0.34, 0.58, 0.37, all P > 0.05). Operative time in the observation group was significantly longer than that in the control group [(80.21 ± 6.52) minutes vs. (75.92 ± 8.15) minutes, t = 2.99, P < 0.05]. Time to fracture healing in the observation group was significantly shorter than that in the control group [(9.25 ± 1.12) weeks vs. (10.05 ± 1.31) weeks, t = 3.37, P < 0.05]. The incidence of complications in the observation group was significantly lower than that in the control group [3.77% (2/53) vs. 16.98% (9/53), χ2 = 4.97, P = 0.025]. At 6 and 12 months after surgery, Harris hip scores in the observation group were (82.84 ± 6.58) points and (85.55 ± 7.91) points, respectively, which were significantly higher than (78.35 ± 7.54) points and (79.92 ± 9.94) points in the control group ( t = 3.26, 3.22, both P < 0.05). Conclusion:Internal fixation with bone cement-reinforced anti-rotation intramedullary nails for treatment of femoral trochanteric fractures can shorten the time to fracture healing, reduce complications, and improve hip joint function.

Influential factors of neonatal hypoxic ischemic encephalopathy and the therapeutic effects of mild hypothermia at different time windows / 中国基层医药

Objective:To investigate the influential factors of neonatal hypoxic ischemic encephalopathy (HIE), and compare the therapeutic effects of mild hypothermia at different time windows and between different degrees of disease severity.Methods:Eighty-two neonates with HIE who were admitted to Jiaxing Maternity and Child Health Care Hospital from January 2016 to October 2021 were included in the patient group, and 123 concurrent healthy neonates were included in the control group. The influential factors of neonatal HIE were analyzed. Sixty-five neonates who received HIE were divided into four groups according to the time length between symptom onset and hospital admission (< 6 hours and 6-12 hours) and disease severity: group I (admission time < 6 hours, mild, n = 20), group II (admission time < 6 hours, moderate to severe, n = 15), group III (admission time 6-12 hours, mild, n = 17), and group IV (admission time 6-12 hours, moderate to severe, n = 13). Amplitude-integrated electroencephalography (aGGE) score was used as the evaluation criteria. The therapeutic effects of mild hypothermia were compared between different time windows and between different degrees of HIE. Results:Multivariable logistic regression analysis results revealed that the influential factors of neonatal HIE included gestational hypertension, gestational diabetes, pregnancy examination, delivery methods, amniotic fluid contamination, abnormal fetal membranes (placenta or umbilical cord), fetal distress, and neonatal asphyxia ( P < 0.05). All 65 neonates with HIE underwent mild hypothermia treatment for 72 hours. Before treatment, aGGE score in groups I, II, III and IV was 6.02 ± 1.74 points, 2.43 ± 1.82 points, 5.23 ± 1.95 points, and 2.72 ± 1.76 points, respectively. After treatment, it was 8.13 ± 2.03 points, 6.47 ± 1.87 points, 7.86 ± 1.92 points, and 3.52 ± 1.95 points, respectively. There was significant difference in aGGE score between before and after treatment in groups I, II and III ( t = 2.87, 3.55, 3.15, all P < 0.05). aGGE score in group IV did not differ significantly between before and after treatment ( P > 0.05). Before treatment, aGGE score in children with moderate to severe HIE was lower than that in children with mild HIE. After treatment, there was no significant difference in aGGE score between groups II and III ( P > 0.05). Conclusion:Pregnant women with gestational hypertension and gestational diabetes should be given intensive monitoring and learn HIE related knowledge to increase the frequency of prenatal examinations. If amniotic fluid contamination, abnormal fetal membranes (placenta or umbilical cord), fetal distress, or neonatal asphyxia occurs, timely monitoring and corresponding interventions should be given to the fetus. Mild hypothermia therapy has a certain therapeutic effect on different degrees of HIE. For moderate to severe neonates, treatment should be started within 6 hours to ensure the therapeutic effects of mild hypothermia.

La retinopatía diabética en la consulta de Retina del Hospital Universitario Manuel Ascunce Domenech / The diabetic retinopathy in the Retinal consultation of the Hospital Universitario Manuel Ascunce Domenech

RESUMEN Introducción: La retinopatía diabética es la complicación microvascular más común de la diabetes mellitus. Niveles elevados de glucosa en sangre inducen cambios estructurales, fisiológicos y hormonales que afectan a los capilares de la retina. La retinopatía inicia su desarrollo al menos siete años antes del diagnóstico de diabetes mellitus tipo 2. Objetivo: Describir el comportamiento dela retinopatía diabética en pacientes atendidos en la consulta de Retina del Hospital Universitario Manuel Ascunce Domenech de la provincia Camagüey. Métodos: Se realizó un estudio descriptivo, longitudinal en pacientes con el diagnóstico de retinopatía diabética. La población la conformaron 330 pacientes que acudieron a la consulta, en el periodo de enero a noviembre 2019 y que cumplieron con los criterios de selección. Se diseñó un formulario de recolección de datos y se estudiaron variables independientes: edad, sexo, factores de riesgo, tiempo de evolución de la enfermedad y como variable dependiente la severidad de la retinopatía. Resultados: El comportamiento de los grupos de edades entre 41 y 60 años, fue más frecuente, seguido de pacientes entre 20 y 40 año que padecieron de retinopatía diabética proliferativas. El mal control glucémico fue el factor de riesgo más frecuente, seguido de la hipertensión arterial. Entre 17 y 21 años de enfermedad, se encontraron la mayor cantidad de pacientes, seguido de los pacientes de 22 a 27 años de enfermedad. Conclusiones: Predominó en el estudio la edad entre 41 y 60 años. Todos los pacientes presentaron más de un factor de riesgo. El mal control glucémico y la hipertensión arterial fueron los factores de riesgo más frecuente en el estudio. El tiempo de evolución de la enfermedad predominó entre 17 y 21 años. Existió relación entre edad del paciente, factores de riesgo y tiempo de evolución de la enfermedad con la severidad de la retinopatía diabética, donde predominó la retinopatía diabética proliferativa.

ABSTRACT Introduction: Diabetic retinopathy isthemostcommonmicrovascularcomplication of diabetes mellitus. Elevatedlevels of glucose in theblood induce structural, physiological and hormonal changesthataffectthecapillaries of the retina. Retinopathy beginsitsdevelopment at leastsevenyearsbeforethe diagnosis of type 2 diabetes mellitus. Objective: To describe thebehavior of diabetic retinopathy in patientstreated at the Retina clinic of the Manuel Ascunce Domenech University Hospital in Camagüey province. Methods: Adescriptive, longitudinal study in patientswiththe diagnosis of diabetic retinopathy wascarriedout. 330 patientsthatattendedtheretinalconsultation in theperiodfromJanuarytoNovember, 2019 and thattheyfulfilledtheselectioncriteria, conformedthepopulation. A collectingfill-outform of data wasdesigned and independent variables: Age, sex, risk factors, time of evolution of disease and likedependent variable theseverity of retinopathy, werestudied. Results: Thebehavior of theagegroupsbetween 41 and 60 years, was more frequent, followedbypatientsbetween 20 and 40 yearthattheysufferedfromproliferative diabetic retinopathy. Thebadglycemic control wasthemostfrequent risk factor, followedbyhighbloodpressure. Thegreatestquantity of patientshadbetween 17 and 21 years of disease, followedbythosepatientsbetween 22 and 27 years of disease. Conclusions: Theagebetween 41 and 60 yearsprevailed in thestudy. Allpatientshad more thanone risk factor. Poor glycemic control and arterial hypertensionwerethemostfrequent risk factors in thestudy. Thedisease'sevolution time between 17 and 21 years of illnesspredominated. Therewas a relationshipbetweenthepatient'sage, risk factors and time of evolution of thediseasewiththeseverity of diabetic retinopathy, whereproliferative diabetic retinopathy predominated.

Time use in elderly people at the low active aging level: a qualitative study / Uso do tempo em idosos em baixo nível de envelhecimento ativo: estudo qualitativo

Abstract Introduction Thailand's population is aging rapidly. Thus, it is necessary to enable elderly people to be independent and actively participate in daily occupations. Objective To describe the time used by elderly people at the low active aging level in a suburban village, in Chiang Mai, northern Thailand. Method The study was qualitative research, using the narrative interview method. Three case studies on the low level of active aging were collected by following an interview-based guideline. The data were analyzed using qualitative content analysis. Results The results showed that elderly people at the low active aging level spent their time in varied activities, depending on personal factors and their contexts. Elderly people participate in different occupations of everyday life, which consist of activities of daily living and self-care, the instrumental activities of daily living, leisure, and work. Conclusion It was found that elderly people spent their time in four main categories: Activities of daily living, Instrumental ADL, leisure, and work. Enabling elderly people to increase active aging by continuing engagement in social participation and education is still challenging.

Resumo Introdução A população da Tailândia está envelhecendo rapidamente. Assim, é necessário que os idosos sejam independentes e participem ativamente das suas ocupações diárias. Objetivo Descrever o tempo utilizado por idosos com baixo nível de envelhecimento ativo. Método Utilizando o método de entrevista narrativa, três estudos de caso foram coletados seguindo uma diretriz baseada em entrevista. Resultados O resultado mostrou que os idosos com baixo nível de envelhecimento ativo despendiam seu tempo em atividades variadas, dependendo de fatores pessoais e de seus contextos. Os idosos participam de diferentes ocupações da vida cotidiana, que consistem em atividade de vida diária e autocuidado, atividade instrumental de vida diária, lazer e trabalho. Conclusão Um equilíbrio das ocupações diárias pode ser destacado para possibilitar o envelhecimento ativo dos idosos.

Correlation between climate change and epistaxis in Yueqing of Zhejiang province / 中国基层医药

Objective:To correlate climate change with epistaxis in Yueqing of Zhejiang province and to provide evidence for the diagnosis and treatment of epistaxis.Methods:A total of 1 800 patients with epistaxis, who received treatment in Yueqing People's Hospital between October 2018 and October 2019, were included in this study. The data of these patients were input into the Microsoft Excel software. They were summarized and sorted as per admission time. Climate change was correlated with epistaxis.Results:Daily average temperatures were negatively correlated with epistaxis ( r = -0.65, P = 0.003). A non-linear, inverted-U-shaped relationship was observed between daily relative humidity and epistaxis. When the daily relative humidity was < 65%, daily relative humidity was positively correlated with epistaxis ( r = -0.54, P = 0.007).When the daily relative humidity was > 65%, daily relative humidity was negatively correlated with epistaxis ( r = -0.68, P = 0.002). There was a nearly linear positive correlation between diurnal temperature range and epistaxis ( r = 0.52, P = 0.009). There was a linear and positive correlation between daily average atmospheric pressure and epistaxis ( r = 0.60, P = 0.004). The risk of epistaxis increased by 1.48% (95% CI: -2.15 to -0.81) when the temperature decreased by 1 ℃. When daily relative humidity was < 65%, the effects of humidity change on the risk of epistaxis were not statistically significant ( P > 0.05). When the relative humidity of the day was > 65%, the risk of epistaxis decreased by 1.82% (95% CI: -2.71 to -0.93) for every unit of humidity rise. The risk of epistaxis increased by 2.86% (95% CI: 0.54 - 5.18) for every 1 ℃ increase in temperature. The risk of epistaxis increased by 1.18% (95% CI: 0.50 - 1.87) for every 1 Pa increase in air pressure. Conclusion:Temperature change is negatively correlated with epistaxis. Atmospheric pressure and diurnal temperature range are positively correlated with epistaxis. Temperature change, atmospheric pressure, and diurnal temperature have temporary effects on epistaxis. High humidity has an obvious long-term protective effect against epistaxis.

Feasibility of a single catheter intervention using the transradial approach for ST-segment elevation myocardial infarction / 中国基层医药

Objective:To evaluate the safety and effectiveness of primary percutaneous coronary intervention using the transradial approach in patients with acute ST-segment elevation myocardial infarction (STEMI) based on electrocardiography results.Methods:The clinical data of 298 patients with STEMI who had indications of emergency coronary angiography and percutaneous coronary intervention who received treatment in The Second People's Hospital of Shantou between January 2015 and June 2019 were retrospectively included in this study. These patients were assigned into traditional transfemoral intervention (TTFI, n = 56), traditional transradial intervention (TTRI, n = 167), and single transradial intervention (STRI, n = 75) groups. Door-to-balloon (D2B) time, needle-to-balloon (N2B) time, hospital days, and the incidence of major adverse cardiac events within 1 year after treatment were compared among the three groups. Results:The D2B time in the STRI, TTFI and TTRI groups was (67.6 ± 2.1) minutes, (73.3 ± 15.3) minutes, and (77.4 ± 16.7) minutes, respectively. There was a significant difference in D2B time among the three groups ( F = -2.24, P = 0.013). The D2B time was significantly shorter in the STRI group than in the TTFI and TTRI groups ( t = -1.84, -1.84, both P = 0.033). The N2B time in the STRI, TTFI and TTRI groups was (7.6 ± 2.1) minutes, (15.3 ± 6.5) minutes, and (14.1 ± 5.7) minutes, respectively. There was a significant difference in N2B time among the three groups ( F = -4.34, all P < 0.001). The N2B time was significantly shorter in the STRI group than in the TTFI and TTRI groups ( t = -2.06, P = 0.020; t = -3.12, P < 0.001). The proportion of patients with D2B time less than 90 minutes in the STRI group was 74.7% (56/75), which was significantly higher than that in the TTRI [46.1% (77/167)] and TTFI [51.8% (29/56)] groups ( χ2 = 4.07, P < 0.001). The incidence of major adverse cardiac events within 1 year after treatment in the TTFI, TTRI, and STRI groups was 16.1% (9/56), 13.2% (22/167), and 9.3% (7/75), respectively. The incidence of major adverse cardiac events within 1 year after treatment was significantly lower in the STRI group than in the TTFI and TTRI groups ( χ2 = 5.67, P < 0.05). Conclusion:STRI is safe and effective for STEMI and is expected to improve long-term prognosis.

Evaluation on the feasibility of total-body PET/CT imaging with short acquisition time in lungs and parenchymal organs / 中华核医学与分子影像杂志

Objective:To investigate the effects of total-body PET/CT imaging with short acquisition time on image quality and lesion detectability in lungs and parenchymal organs.Methods:Sixty patients (31 males, 29 females, age (61.1±11.8) years) with pulmonary nodules (PN) and 53 patients (29 males, 24 females, age (56.7±17.2) years) with parenchymal organ lesions (POL) who underwent total-body PET/CT imaging in the First Affiliated Hospital of Shandong First Medical University between October 2021 and April 2022 were retrospectively analyzed. The acquisition time with PET was 600 s, and the reconstructed images were divided into 6 groups based on different duration (30, 60, 120, 180, 300 and 600 s), namely G30, G60, G120, G180, G300 and G600 groups. The subjective analysis was carried out with the 5-point Likert scale in 3 aspects: the overall impression of image quality, noise, and lesion conspicuity. The objective analysis indicators included the SUV mean of the mediastinal blood pool (MBP); the SUV mean, standard deviation (SD) and signal-to-noise ratio (SNR) of the liver; SUV max and target-to-background ratio (TBR) of the lesions. Differences of the indicators among 6 groups were analyzed by Friedman test with Bonferroni correction. G600 served as the reference for the other 5 groups to test their lesion detectability. Results:The subjective image quality of different groups for PN and that of G120, G180, G300 groups for POL could meet the needs of clinical diagnosis in terms of the overall image quality, noise, and lesion conspicuity (all scores>3). There was no significant difference in the SUV mean of MBP among different time groups (median for PN: 1.52-1.56, median for POL: 1.35-1.47; χ2 values: 10.23, 11.02, both P>0.05). Difference was not found in SUV mean of the liver either (median for PN: 2.51-2.56, median for POL: 2.33-2.40; χ2 values: 8.35, 8.93, both P>0.05). The liver SD significantly increased along with the shortened acquisition time ( χ2 values: 400.99, 400.00, both P<0.001; z values: from -16.90 to -3.15, all P<0.003). The SNR significantly decreased along with the shortened acquisition time ( χ2 values: 397.32, 400.00, both P<0.001; z values: 2.98-16.90, all P<0.003). The SUV max (median for PN: 3.55-4.01, median for POL: 5.77-6.08; χ2 values: 8.58, 3.02, both P>0.05) and TBR (median for PN: 2.42-2.81, median for POL: 2.36-2.45; χ2 values: 9.83, 3.69, both P>0.05) of lesion were not significantly different among 6 groups. Taking G600 group as a reference, the lesion detection rates were 100% in G30 group and other 4 groups for PN (81/81) and in G120, G180, G300 groups for POL (80/80). Conclusion:Total-body PET/CT imaging with acquisition time of 30 s for lungs and that with acquisition time of 120 s for parenchymal organs are feasible for clinical use, with the PET image quality and lesion detectability maintained.

Study on improving the quality of low-dose PET images of children based on generative adversarial networks / 中华核医学与分子影像杂志

Objective:To investigate the value of generative adversarial networks-based PET image reconstruction in improving the quality of low-dose 18F-FDG PET images and lesion detection in pediatric patients. Methods:Retrospective analysis of 61 PET images of children (38 males, 23 females, age (4.0±3.5) years) who underwent 18F-FDG total-body PET/CT imaging in Beijing Friendship Hospital, Capital Medical University from August 2021 to December 2021 was performed. The low-dose images (30 s, 20 s, 10 s) of all children extracted by list mode were input into the generative adversarial networks for deep learning (DL) reconstruction to obtain the corresponding simulated standard full-dose images (DL-30 s, DL-20 s, DL-10 s). The semi-quantitative parameters of the liver blood pool and primary lesion of standard full-dose 120 s, 30 s, 20 s, 10 s, DL-30 s, DL-20 s, and DL-10 s images were measured. The target-to-background ratio (TBR), contrast-to-noise ratio (CNR), and CV were calculated. The 5-point Likert scale was used for subjective scoring of image quality, and the detective abilities for positive lesions of each groups were compared. The sensitivities and positive predictive values of positive lesions detection were calculated. Mann-Whitney U test and Kruskal-Wallis rank sum test and χ2 test were used for data analyses. Results:CNR of the 30 s, 20 s, and 10 s groups were lower than those of DL-30 s, DL-20 s, and DL-10 s groups, respectively ( z values: -3.58, -3.20, -3.65, all P<0.05). Score of DL-10 s group was significantly lower than those of 120 s, DL-30 s and DL-20 s groups (4(3, 4), 5(4, 5), 4(4, 5), 4(4, 5); H=97.70, P<0.001). There were no significant differences in TBR, CNR, CV, SUV max and SUV mean of lesions and liver blood pool in 120 s, DL-30 s, DL-20 s, and DL-10 s groups ( H values: 0.00-6.76, all P>0.05). The sensitivities of positive lesion detection in DL-30 s, DL-20 s, and DL-10 s groups were 97.83%(225/230), 96.96%(223/230), 95.65%(220/230), respectively, and the positive predictive values were 96.57%(225/233), 93.70%(223/238), 84.94%(220/259), respectively. The positive predictive value in DL-10 s group was lower than those in DL-30 s and DL-20 s groups ( χ2=23.51, P<0.001). There were more false-positive and false-negative lesions detected by DL-10 s group than those of DL-30 s and DL-20 s groups in different sites. Conclusion:Based on the generative adversarial networks, the image quality of DL-20 s group is high and can meet the clinical diagnostic requirements.