Aesthetic effect evaluation of the xenogeneic collagen matrix in keratinized mucosa augmentation around dental implants / 口腔疾病防治

Objective@#To evaluate the stability and aesthetic effect of a xenogeneic collagen matrix (mucograft) on achieving an adequate keratinized mucosa width (KMW) around implants and to provide a reference basis for the clinical application of xenogeneic collagen matrix materials.@*Methods@#The hospital ethics committee approved the study protocol, and the patients provided informed consent. Twenty patients with a KMW<2 mm at the buccal implant site who were treated in Binzhou Medical University Affiliated Yantai Stomatological Hospital from July 2020 to September 2022 were included, and a total of 36 implants were included. The mean age of the patients was (52.0±10.4) years, of which 18 were females and 2 were males. They were divided into a free gingival graft group (FGG, control group) and a xenogeneic collagen matrix group (test group) according to different graft materials. The incremental effect of the KMW on the buccal side of the implant and the mucosal shrinkage rate was measured at 1 month and 3 months after the operation. The mucosal scar index (MSI) was evaluated after the operation.@*Results@#At 3 months postoperatively, the KMW was (3.67 ± 1.06) mm in the control group and (2.96 ± 0.98) mm in the test group, and the difference was statistically significant (t = 2.076, P<0.05). The KMW shrinkage rate was (33.34 ± 16.30) % in the test group and (22.05 ± 15.47) % in the control group at 1 month postoperatively and (51.95 ± 12.60) % in the test group and (37.44 ± 16.30) % in the control group at 3 months postoperatively, with statistically significant differences between the two groups at the same time points (P<0.05). Three months after surgery, the test group showed significantly better outcomes than the control group in terms of the five scar indicators (scar width, scar convexity, scar color, scar trace, and overall appearance), and the difference was statistically significant (P<0.05).@*Conclusion@#Xenogeneic collagen matrix can increase the peri-implant KMW and achieve a more natural and coordinated soft tissue aesthetic effect but with a higher shrinkage rate.

Clinical analysis of orthodontic traction of impacted upper incisors / 口腔疾病防治

Objective@#To study the effect of orthodontic traction on the roots and periodontal soft and hard tissues of buried obstructed upper incisors.@*Methods@#This study was reviewed and approved by the ethics committee, and informed consent was obtained from the patients. From January 2018 to December 2022, 40 patients who underwent orthodontic traction on impacted upper incisors were selected; those whose contralateral homonymous apical foramen was not developed were placed in group A (23 cases), and those whose contralateral homonymous apical foramen was developed were placed in group B (17 cases). Software was used to measure the root length of the impacted upper incisors in groups A and B on cone beam CT (CBCT) images before and after traction and compare the changes in alveolar bone (alveolar bone width, labral bone plate thickness, and horizontal height of alveolar bone) and keratinized gingival width between each impacted upper incisor and the corresponding contralateral tooth immediately and one year after traction@*Results@#The root length of the impacted upper incisors increased after traction compared to before traction (P<0.05). The width of the alveolar bone at the completion of traction in group A was similar to that of the contralateral homonymous tooth (P>0.05), whereas the width of the alveolar bone at the completion of traction in group B did not reach that of the contralateral homonymous tooth, with a significant difference in width (P<0.05). Neither the labial bone plate height or width in group A or B reached that of the contralateral homonymous tooth after traction (P<0.05). The keratinized gingival width on the affected side was also significantly smaller than that on the contralateral side (P<0.05), but it was increased significantly in group A at the one-year follow-up visit (P<0.05).@*Conclusion@#Tooth traction is conducive to impacted upper incisor root growth, alveolar bone reconstruction and keratinized gingival growth but cannot produce complete symmetry with respect to the contralateral side.

Flowering time and harvest on floral morphology and production of hermaphrodite flowers in the cashew tree Anacardium occidentale (Anacardiaceae)

Introduction: Morphological parameters of flowering are fundamental in the reproductive process of plants, but this subject is poorly explored in the cashew tree Anacardium occidentale. Objective: To determine the influence of the flowering and harvest period on floral parameters, and to identify association with hermaphrodite flowers in the dwarf cashew. Methods: For the 2018 and 2019 harvests in 120 samples we measured number of male/hermaphrodite/abnormal flowers; panicle biomass, length, maximum width, and ramifications at 30, 45 and 60 days for 360 samples in total. Results: The harvest effect was not significant. Panicle length and width (at 30 days), had the greatest contributions to the production of hermaphrodite flowers. The presence of male flowers (at 45 days), and the panicle length and number of primary branches (at 60 days) were the main factors at their respective periods. Conclusions: The emission of hermaphrodite flowers responds negatively to male flowers. Variations in flowering compromise the production of hermaphrodite flowers and the flowering structure.

Introducción: Parámetros morfológicos de la floración son fundamentales en el proceso reproductivo de las plantas, sin embargo, el tema es poco explorado en el árbol de marañón Anacardium occidentale. Objetivo: Determinar la influencia de la floración y periodos de cosecha sobre parámetros florales, e identificar asociaciones con flores hermafroditas en el marañón enano. Métodos: Para las cosechas de 2018 y 2019 en 120 muestras, medimos el número de flores masculinas/hermafroditas/anormales; biomasa de panícula, largo, ancho máximo, y ramificaciones a los 30, 45 y 60 días, un total de 360 muestras. Resultados: El efecto de la cosecha fue insignificante. Longitud y ancho de la panícula (a los 30 días), tuvo la mayor contribución a la producción de flores hermafroditas. La presencia de flores masculinas (a los 45 días), y el largo de panícula y número de ramas primarias (a los 60 días) fueron los principales factores en sus periodos respectivos. Conclusiones: La emisión de flores hermafroditas responde negativamente a flores masculinas. Variaciones en la floración afecta la producción de flores hermafroditas y estructura de floración.

El ancho de distribución eritrocitaria en el pronóstico de corrección quirúrgica de cardiopatías congénitas / Red cell distribution width in the prognosis of surgical correction of congenital heart diseases

Resumen Objetivo: Evaluar la capacidad del ancho de distribución eritrocitaria (ADE) para predecir la mortalidad en niños sometidos a cirugía cardiovascular en la Fundación Hospital Infantil Napoleón Franco Pareja, en Colombia. Método: Estudio analítico de corte transversal retrospectivo que incluyó 45 individuos de 0 a 17 años operados de cardiopatía congénita. Se aplicaron la escala RACHS-1 (Risk Adjustment in Congenital Heart Surgery) y variables de laboratorio, incluyendo el ADE. La asociación entre el ADE y la mortalidad se determinó mediante análisis por curva ROC y correlación rho de Spearman. Resultados: Un ADE superior al 15.52% representó 1.6 veces más riesgo, comparado con los individuos por debajo de ese valor (intervalo de confianza del 95%: 1.01-2.6; p = 0.034). Los valores del ADE no se correlacionaron con los días de estancia hospitalaria ni con las complicaciones. El ADE prequirúrgico y el puntaje RACHS-1 fueron significativamente mayores en el grupo de mortalidad. La relación entre el ADE prequirúrgico y el puntaje RACHS-1 fue significativa. Conclusiones: En nuestro estudio, el ADE prequirúrgico presentó un poder moderado para discriminar la mortalidad perioperatoria en la corrección quirúrgica de cardiopatías congénitas. Se precisan más estudios con mayor tamaño de muestra.

Abstract Objective: To evaluate the capacity of red cell distribution width (RDW) to predict mortality in children undergoing cardiovascular surgery at the Fundación Hospital Infantil Napoleón Franco Pareja, in Colombia. Method: Retrospective cross-sectional analytical study that included 45 individuals aged 0 to 17 years operated for congenital heart disease. The RACHS-1 (Risk Adjustment in Congenital Heart Surgery) scale and laboratory variables including the RDW were applied. The association between RDW and mortality was determined by ROC curve analysis and Spearman's rho correlation. Results: An RDW greater than 15.52% represented 1.6 times more risk, compared to individuals below that value (95% confidence interval: 1.01-2.6; p = 0.034). The RDW values did not correlate with days of hospital stay or complications. The preoperative RDW and RACHS-1 score were significantly higher in the mortality group. The relationship between presurgical RDW and the RACHS-1 score was significant. Conclusions: In our study, the preoperative RDW had moderate power to discriminate perioperative mortality in the surgical correction of congenital heart disease. More studies with a larger sample size are required.

N-terminal del péptido natriurético tipo B y la amplitud de distribución eritrocitaria como factor pronóstico de severidad en pacientes con insuficiencia cardiaca aguda descompensada

Introducción: El estudio de predictores de desenlaces negativos en pacientes con insuficiencia cardiaca ha incluido la combinación de péptidos natriuréticos y el ancho de distribución eritrocitaria (RDW). Objetivo: Evaluar el uso combinado de la porción N-terminal del propéptido natriurético tipo B (NT-proBNP) y el RDW como pronóstico de fallecimiento por cualquier causa, hospitalización prolongada y reingreso al año del alta en pacientes con insuficiencia cardiaca aguda (ICA) descompensada. Métodos: Realizamos un estudio observacional retrospectivo. Construimos un índice combinado = NT-proBNP x RDW/100. Elaboramos curvas ROC, se estimó la sensibilidad y especificidad en base a los puntos de corte y se estimó el riesgo relativo para desarrollar los desenlaces. Comparamos las áreas bajo las curvas del índice combinado versus el NT-proBNP y RDW, por separado. Resultados: Analizamos los datos de 471 pacientes. El índice combinado tuvo su mejor corte en 927,79 para pronosticar fallecimiento durante el primer año de ingreso. Aquellos con valores ≥ 927,79 tuvieron un riesgo relativo de 32,7 (IC95%: 4,8 - 222,3). Para hospitalización ≥7 días el punto de corte fue 752,67, aquellos con este valor o superiores tuvieron un riesgo relativo de 22,4 (IC95%: 9,7 - 51,8). Para pronosticar reingreso al año del alta el corte fue 858,47 y el riesgo relativo fue 4,7 (IC95%: 3,3 - 6,8). Conclusiones: El índice combinado generó riesgos relativos que muestran una fuerte fuerza de asociación para fallecimiento por cualquier causa, hospitalización ≥ 7 días y reingresos al año del alta. Sin embargo, la superioridad para discriminar no fue concluyente respecto a los componentes individuales.

Introduction: The study of predictors of negative outcomes in patients with heart failure has included the combination of natriuretic peptides and red cell distribution width (RDW). Objective: To evaluate the combined use of the amino-terminal pro-brain natriuretic peptide (NT-proBNP) and RDW as a prognostic factor for death from any cause, prolonged hospitalization, and readmission one year after discharge in patients with decompensated acute heart failure (AHF). Methods: We conducted a retrospective observational study. We constructed a combined index = NT-ProBNP x RDW/100. ROC curves were constructed, sensitivity and specificity were estimated based on the cut-off points, and the relative risk was estimated to develop the outcomes studied. We compared the area under curve of combined index versus NT-proBNP and RDW, separately. Results: We analyzed data from 471 patients. The combined index had its best cut of 927.79 to predict death during the first year of admission. Those with values ≥ 927,79 had a relative risk of 32.7 (95% CI: 4.8 - 222.3). To predict hospitalization ≥ 7 days, the cut-off point was 752.67; those with this value or higher had a relative risk of 22.4 (95% CI: 9.7 - 51.8). To predict readmission one year after discharge, the cutoff was 858.47 and the relative risk was 4.7 (95% CI: 3.3 - 6.8). Conclusions: The combined index used generate relative risks that show a strong strength of association for death from any cause, hospitalization ≥7 days, and readmissions one year after discharge. However, the superiority to discriminate was inconclusive with respect to the individual components.

Relationship between platelet indices and red cell distribution width and short-term mortality in traumatic brain injury with 30-day mortality

SUMMARY OBJECTIVE: This study aimed at investigating whether there is a relationship between 7- or 30-day mortality and mean platelet volume, platelet distribution width, platelet count-to-total lymphocyte count ratio, or red cell distribution width in patients with traumatic brain injury. METHODS: We retrospectively analyzed intensive care unit patients with traumatic brain injury. We recorded patients' ages; genders; diagnoses; Glasgow Coma Scale scores; length of intensive care unit stay (in days); mean platelet volume, platelet distribution width, platelet count-to-total lymphocyte count ratio, and red cell distribution width values upon hospital admission; and health on the 7th and 30th days of their stays. RESULTS: We analyzed data from 110 patients. Of these, 84 (76.4%) were male and 26 (23.6%) were female. On the 7- and 30-day mortality evaluations, compared to the living patients, the deceased patients had a significantly higher median age and a significantly lower median Glasgow Coma Scale. Thus, increased age and lower Glasgow Coma Scale scores were associated with increased 7- and 30-day mortality rates. mean platelet volume and platelet distribution width values were similar in living and deceased patients. platelet count-to-total lymphocyte count ratio values were lower in deceased patients, but this difference was not statistically significant. Within 30 days after traumatic brain injury, deceased patients' red cell distribution width values were significantly elevated in deceased patients compared to those of living patients. CONCLUSION: Mean platelet volume, platelet distribution width, and platelet count-to-total lymphocyte count ratio values were not associated with 7- and 30-day mortality, whereas only elevated red cell distribution width was associated with 30-day mortality.

Relationship between red blood cell distribution width and short-term mortality of hip fractures in the elderly / 中华老年医学杂志

Objective:To study the relationship between red blood cell distribution width(RDW)and short-term mortality in elderly patients with hip fragility fractures.Methods:The clinical data and blood routine test at admission of 205 elderly patients with brittle hip fractures who were admitted to our hospital from 2020 to 2021 and were followed up for one year were retrospectively analyzed.The comorbid conditions, RDW and cumulative mortality at 6 months and 1 year after fractures were counted, and the relationship between RDW and short-term mortality were analyzed.Results:The 6-month(6.7% and 20.8%, χ2=8.591, P=0.003)and 1-year(6.7% and 26.7%, χ2=14.818, P<0.001)mortality of patients with ≤1 comorbidity were significantly lower than those of patients with ≥2 comorbidities.Moreover, the 6-month and 1-year mortality in patients with RDW>13.5% were significantly higher than those of patients with RDW ≤ 13.5%.The proportion of RDW>13.5 % in patients with at least two comorbidities was significantly higher than that in patients with ≤1 comorbidity.Taking RDW=13.6% as the cut-off value of 6-month and 1-year mortality, the sensitivity and specificity for predicting 6-month mortality were 71.4 % and 59.9 %, respectively, and the sensitivity and specificity for predicting 1-year mortality were 64.7 % and 59.6 %, respectively. Conclusions:Red cell distribution width is associated with short-term mortality, and higher RDW is associated with a higher risk of mortality among elderly patients with brittle hip fractures.

The effect of CT detector width and signal acquisition positions on image quality / 中华放射学杂志

Objective:To evaluate the influence of different detector widths and signal acquisition positions of wide-detector CT in different scanning modes on CT number and noise, and to provide a basis for reasonable selection of scanning modes and related parameters in clinical practice.Methods:The body dose phantom was scanned by GE Revolution CT. The scan was performed with detector widths of 40, 80 and 160 mm in sequential scanning mode and with detector width/pitch combinations of 40 mm/0.516, 40 mm/0.984, 80 mm/0.508 and 80 mm/0.992 in spiral scanning mode. The phantom was placed at the central and peripheral of the selected detector widths, and the adjacent positions between two axial scans. The images of the phantom were evaluated subjectively and the CT numbers and SDs were measured. The differences between the measured values at different imaging parameters were compared. The multi-group Friedman test was used to compare CT numbers and SD under different scanning parameters in sequential scanning mode, and the Wilcoxon test was used to compare CT numbers and SD in spiral scanning mode.Results:There was no statistically significant difference in the geometric shapes of the phantom images obtained at any combination of parameters. In sequential scanning mode, the differences at different detector widths were statistically significant (χ 2=14.00, P=0.001) with CT numbers at 40 mm and 160 mm greater than CT numbers at 80 mm ( P<0.05). The differences at different signal acquisition positions were statistically significant (χ 2=12.04, P=0.002) with CT numbers at peripheral and adjacent greater than CT numbers at central ( P<0.05). In spiral scanning mode CT numbers at detector width at 80 mm were greater than CT numbers at 40 mm ( Z=-2.10, P=0.036). For SD, the differences at different detector widths were statistically significant in sequential scanning modes (χ 2=8.17, P=0.017) with SD at 160 mm greater than SD at 80 mm ( P<0.05). The differences at different signal acquisition positions were statistically significant (χ 2=13.50, P=0.001) with SD at peripheral greater than SD at central ( P<0.05). In spiral scanning mode SDs at pitches 0.984 and 0.992 were greater than SDs at 0.516 and 0.508 ( Z=-2.66, P=0.008). There were no significant differences among other groups. Conclusion:The selection of scanning mode, detector width and signal acquisition position of wide-detector CT will affect the image CT numbers and SDs.

The relationship of RDW-SD, NLR and FIB with the prognosis of multiple myeloma patients and their predictive value / 中国医师杂志

Objective:To explore the relationship between the standard deviation of red blood cell distribution width (RDW-SD), neutrophil/lymphocyte value (NLR), fibrinogen (FIB) and the prognosis of multiple myeloma (MM) patients and their predictive value.Methods:In this study, a retrospective study method was used to select 120 patients with MM who were initially diagnosed in the department of hematology of the Affiliated Hospital of Jining Medical College from January 2017 to October 2019. The follow-up time was 24 months, including 62 patients who survived (survival group) and 58 patients who died (death group). The RDW-SD, NLR and FIB values of the two groups were compared, and the value of the three indicators in predicting the follow-up outcome of MM patients was analyzed using the receiver operating characteristic (ROC) curve. Logistic regression model was used to analyze the related factors affecting the prognosis of MM patients.Results:Among 120 newly treated MM patients, the RDW-SD, NLR and FIB of the survival group were significantly lower than those of the death group (all P<0.05); The sensitivity, specificity and area under ROC curve (AUC) of RDW-SD+ NLR+ FIB in predicting adverse outcomes of MM patients were 88.96%, 84.50% and 0.919 respectively. Logistic multivariate regression analysis showed that ≥60 years old, International Staging System (ISS) Ⅲ, β2-microglobulin (β2-MG)≥3 500 ng/ml, increased RDW-SD, NLR, and FIB will increase the risk of poor prognosis in MM patients (all P<0.05). Conclusions:The RDW-SD, NLR and FIB have a close relationship with the poor prognosis of newly treated MM patients, and the combined application has certain value in predicting the prognosis of patients.

The value of red cell distribution width, procalcitonin, C-reactive protein, and mean platelet volume/platelet count in predicting the prognosis of patients with acute exacerbations of chronic obstructive pulmonary disease / 中国基层医药

Objective:To investigate the value of red cell distribution width (RDW), procalcitonin (PCT), C-reactive protein (CRP), mean platelet volume (MPV)/platelet count (PLT) in predicting the prognosis of patients with acute exacerbations of chronic obstructive pulmonary disease (AECOPD).Methods:The clinical data of 137 patients with AECOPD admitted to the Department of Laboratory Medicine of Haiyang People's Hospital from March 2020 to March 2021 were retrospectively analyzed. According to their prognosis, these patients were divided into the survival group ( n = 99) and the death group ( n = 38). RDW, MPV, and PLT were measured using a blood cell analyzer (mindray ABC5390) in all patients. PCT and CRP levels were measured using the ETHealthcare instrument in all patients. RDW, PCT, CRP, and MPV/PLT were compared between the two groups. The value of RDW, PCT, CRP and MPV/PLT in predicting the prognosis of patients with AECOPD was analyzed using receiver operating characteristic curves. Results:The length of hospital stay and hospitalization expenses in the survival group were (10.75 ± 2.51) days and (1.49 ± 0.46) ten thousand yuan, respectively, which were significantly shorter and lower than (12.81 ± 3.36) days and (2.18 ± 0.57) ten thousand yuan in the death group ( t = 6.11, 14.45, both P < 0.05). The level of PLT in the survival group was significantly higher than that in the death group [(214.01± 63.97) × 10 9/L vs. (189.04 ± 61.75) × 10 9/L, t = 2.07, P < 0.05]. RDW, PCT, CRP, MPV, and MPV/PLT in the survival group were (13.18 ± 2.30)%, (4.30 ± 1.82) ng/L, (31.06 ± 10.38) mg/L, (11.39 ± 2.16) fL, and (0.05 ± 0.01), respectively, which were significantly lower than (16.65 ± 1.78)%, (9.55 ± 2.11) ng/L, (68.21 ± 20.94) mg/L, (12.28 ± 2.09) fL, (0.06 ± 0.02) in the death group ( t = 8.38, 14.45, 13.82, 2.18, 3.88, all P < 0.05). The receiver operating characteristic curve analysis results showed that the area under the curves depicting the value of RDW, PCT, CRP, MPV/PLT and their combination in predicting AECOPD was 0.831, 0.978, 0.966, 0.713, 0.988, with the predictive sensitivity of 62.6%, 89.9%, 91.9%, 59.6%, 98.0%, respectively, and the predictive specificity of 97.4%, 97.4%, 100.0%, 65.8%, 92.1%, respectively. Conclusion:Combined detection of RDW, PCT, CRP and MPV/PLT has a high value for the prediction of AECOPD. Corresponding indicators should be selected according to the actual situation of patients to guide clinical diagnosis and treatment.

Hemodynamic Effects of Banding Width on Pulmonary Artery / 医用生物力学

Objective To investigate the effects of banding width on hemodynamic characteristics of pulmonary artery (PA) by constructing pulmonary artery banding (PAB) models with different widths. Methods Based on clinical practice, with the same banding position and degree, computer-aided design (CAD) was utilized to reconstruct three-dimensional PAB models with different banding widths (2, 3, 4, 5 mm). Hemodynamic characteristics of the models with different banding widths, including pressure, streamlines, energy loss, energy efficiency and blood flow distribution ratio, were compared and analyzed through computational fluid dynamics (CFD). Results The pressure of PA decreased significantly, while the change of banding width had no significant effects on the pressure drop level at banding position. With the increase of banding width, the energy loss decreased, and the energy efficiency showed an upward trend. The blood flow of the left PA raised, and the ratio of blood flow distribution between the left PA and right PA increased, with the maximum reaching up to 2.28 : 1. Conclusions The increase of banding width can reduce the energy loss of PA and improve the energy efficiency of blood flow, but it will lead to the imbalance of blood flow distributions between the left and right lungs. Both the balance of blood flow distribution and the energy loss should be considered in choice for banding width of PAB. The virtual design of PAB surgery based on CAD and CFD will assist individualized banding width selection in future.

The preoperative CONUT score combined with HRR can help assess the prognosis of patients with UTUC undergoing radical nephroureterectomy / 现代泌尿外科杂志

【Objective】 To investigate the predictive value of preoperative controlled nutritional status (CONUT) score and ratio of hemoglobin to red cell distribution width (HRR) for survival of patients with upper urinary tract urothelial carcinoma (UTUC) after radical surgery. 【Methods】 A retrospective analysis was performed on 145 UTUC patients who underwent surgical treatment in the Affiliated Hospital of Xuzhou Medical University during May 2011 and Jun. 2017. Clinic opathologic data were collected, the best cut-off values of CONUT score and HRR were determined with receiver operating characteristic (ROC) curve, and the CONUT-HRR scoring system was established. The correlation between different CONUT-HRR scores and clinic opathological indicators of UTUC patients was compared. The application value of CONUT-HRR score in predicting the prognosis of UTUC patients was evaluated with Kaplan-Meier survival curve and Cox proportional risk regression model. 【Results】 The optimal cut-off values of preoperative CONUT score and HRR for predicting cancer specific survival (CSS) were 3 and 10.41, respectively. The patients were divided into three groups: CONUT-HRR 0 group (n=62, CONUT score <3 and HRR ≥10.41), CONUT-HRR 1 group (n=51, CONUT score <3 and HRR <10.41, or CONUT score ≥3 and HRR≥10.41), and CONUT-HRR 2 group (n=32, CONUT score ≥3 and HRR <10.41). CONUT-HRR score was correlated with age, surgical method, pathological T stage, lymph node metastasis and vascular invasion (all P<0.05). Kaplan-Meier survival curve results showed that the 5-year CSS of CONUT-HRR 0, 1 and 2 groups were 96.4%, 65.8% and 30.9%, respectively, with statistically significant differences (P<0.001). Cox regression model showed that CONUT-HRR score, pathological T stage, lymph node metastasis and vascular infiltration were independent factors of CSS. 【Conclusion】 Preoperative CONUT-HRR score can be used as a simple and reliable indicator to evaluate the prognosis of UTUC patients. Higher score indicates worse prognosis.

Association between platelet distribution width and hyperuricemia in healthy population / 西安交通大学学报(医学版)

【Objective】 To analyze the correlation between platelet distribution width (PDW) and hyperuricemia (HUA). 【Methods】 For this study we recruited 4 885 teaching and administrative staff of Xi’an Jiaotong University who took the physical examination in 2020 and met the requirements. The basic information, blood routine and serum biochemical index results were collected and analyzed retrospectively. Data were sorted by gender, and the serum UA level and the prevalence of HUA in different PDW quartiles were compared after dividing PDW into quartiles. The association of PDW with other indexes including age, serum biochemical indexes and blood routine indexes was analyzed. Then, the factors related to HUA in different genders were analyzed, and the independent influence of PDW on HUA was further analyzed. 【Results】 The serum UA level and prevalence of HUA were on the increase among different PDW quartiles both in two genders, and PDW level was positively correlated with serum UA level (P0.05). 【Conclusion】 PDW is correlated with HUA, and PDW may be an independent risk factor for HUA in males. However, further study is needed.

Value of red blood cell distribution width in predicting early poor neurologic improvement after intravenous thrombolysis in patients with ischemic stroke / 中国临床药理学与治疗学

AIM: To explore the predictive value of red blood cell distribution width (RDW) in early poor neurologic improvement after intravenous thrombolysis in acute ischemic stroke (AIS). METHODS: A total of 102 patients with acute ischemic stroke who received intravenous thromblysis with alteplase within 4.5 hours of onset were analyzed retrospectively. RDW level was measured before thrombolysis. According to the percentage change in NIHSS at 24 hours, the patients were divided into two groups: good neurological improvement (≥ 30%) group (n=53) and poor neurological improvement (<30%) group (n=49). The univariate and multivariate Logistic regression analysis were used to investigate whether RDW level is an independent factor affecting patients' neurological improvement. The receiver operating characteristic (ROC) curve was used to analyze the cut-off value of RDW to predict poor early neurological improvement after thrombolysis. RESULTS: Compared with the good neurological improvement group, higher proportion of atrial fibrillation (24.5% vs. 9.4%, P= 0.042), diabetes mellitus (57.1% vs. 30.2%, P= 0.006), hemorrhagic transformation (10.2% vs. 0%, P=0.023) in the poor neurological improvement group. The level of RDW in poor neurological improvement group was significantly higher than that in good neurological improved group(14.09±0.77) vs. (13.31±0.63), P=0.000. Logistic regression analysis showed that elevated RDW (OR=4.614, 95%CI: 2.263-9.408, P=0.000) and history of diabetes mellitus (OR=2.606, 95%CI: 1.034-6.573, P=0.042) were independently associated with early poor neurological improvement. The ROC curve analysis showed that the optimal cut-off value of RDW to predict poor early neurological improvement after thrombolysis was 13.56% (AUC=0.782, 95%CI: 0.690-0.874; sensitivity 76%; specificity 74%). CONCLUSION: Elevated RDW is of a certain value in predicting the poor early neurological improvement of AIS patients after thrombolysis.

Study of dental arch width in patients with idiopathic condylar resorption / 临床耳鼻咽喉头颈外科杂志

Objective:To investigate the relationship between idiopathic condylar resorption （ICR） and arch width disorder. Methods:Thirty-two patients with ICR and twenty patients without condylar resorption were enrolled according to the same inclusion criteria. They were divided into experimental group and control group. The experimental group was divided into unilateral ICR group and bilateral ICR group according to the affected side of condylar resorption, and then experimental group was divided into subgroups ICR Ⅰ, ICRⅡand ICR Ⅲ according to the degree of condylar resorption. Patients with no condylar resorption were used as a control group. The width of anterior, middle and posterior segments of dental arch on cone beam computed tomography（CBCT） was measured and the two groups of measured values were statistically analyzed. Results:Compared with the control group, the width of maxillary anterior, middle and posterior segments in ICR group was significantly reduced, and the difference was statistically significant（P<0.01）. But the width of mandibular segment was not significantly different from that in control group（P>0.05）. There was no significant difference in the width of anterior, middle and posterior dental arch between subgroups（P>0.05）. Conclusion:Almost all patients with ICR have malocclusion of maxillary and mandibular arch width, but there is no significant correlation between the malocclusion width and the severity of condylar resorption.

Molecular dynamics simulation reveals DNA-specific recognition mechanism via c-Myb in pseudo-palindromic consensus of mim-1 promoter / 浙江大学学报（英文版）（B辑：生物医学和生物技术）

This study aims to gain insight into the DNA-specific recognition mechanism of c-Myb transcription factor during the regulation of cell early differentiation and proliferation. Therefore, we chose the chicken myeloid gene, mitochondrial import protein 1 (mim-1), as a target to study the binding specificity between potential dual-Myb-binding sites. The c-Myb-binding site in mim-1 is a pseudo-palindromic sequence AACGGTT, which contains two AACNG consensuses. Simulation studies in different biological scenarios revealed that c-Myb binding with mim-1 in the forward strand (complex F) ismore stable than that inthereverse strand (complex R). The principal component analysis (PCA) dynamics trajectory analyses suggested an opening motion of the recognition helices of R2 and R3 (R2R3), resulting in the dissociation of DNA from c-Myb in complex R at 330 K, triggered by the reduced electrostatic potential on the surface of R2R3. Furthermore, the DNA confirmation and hydrogen-bond interaction analyses indicated that the major groove width of DNA increased in complex R, which affected on the hydrogen-bond formation ability between R2R3 and DNA, and directly resulted in the dissociation of DNA from R2R3. The steered molecular dynamics (SMD) simulation studies also suggested that the electrostatic potential, major groove width, and hydrogen bonds made major contribution to the DNA‍-specific recognition. In vitro trials confirmed the simulation results that c-Myb specifically bound to mim-1 in the forward strand. This study indicates that the three-dimensional (3D) structure features play an important role in the DNA-specific recognition mechanism by c-Myb besides the AACNG consensuses, which is beneficial to understanding the cell early differentiation and proliferation regulated by c-Myb, as well as the prediction of novel c-Myb-binding motifs in tumorigenesis.

Efficacy of different frequency of intense pulsed light in the treatment of meibomian gland dysfunction / 国际眼科杂志(Guoji Yanke Zazhi)

AIM: To investigate the efficacy and safety of frequency of intense pulsed light(IPL)in the treatment of meibomian gland dysfunction.METHODS: In this retrospective study, a total of 108 patients(216 eyes)with meibomian gland dysfunction admitted to our hospital from January 2021 to June 2022 were included. They were divided into two groups, with 54 cases(108 eyes)IPL group(energy density 13.0J/cm2, pulse width 6ms, delay time 50ms), and 54 cases(108 eyes)in advanced optimal pulsed technology(AOPT)group(energy density 10.0-16.0J/cm2, pulse width 7-4-4 ms in unequal-division mode). The clinical effects of the two groups were observed and compared, including ocular surface symptoms, corneal fluorescein staining score(FL), tear film lipid layer thickness(LLT), ocular surface disease index(OSDI)score, mean non-invasive tear film break-up time(NIBUTav)and first non-invasive tear film break-up time(NIBUTf), tear meniscus height, score of meibomian gland secretion and its secretion traits, and the incidence of adverse effects was also calculated.RESULTS: The effective rate of the AOPT group(106 eyes, 98.1%)was higher than that of the IPL group(90 eyes, 83.3%, P&#x003C;0.05), as well as OSDI score, FL score, score of meibomian gland secretion and its secretion traits, LLT NIBUTav, NIBUTf and tear meniscus height(all P&#x003C;0.001). However, the incidence of adverse effects of the AOPT group(18 eyes, 16.7%)was higher than that of the IPL group(4 eyes, 3.7%; P&#x003C;0.05).CONCLUSION: With significant improvement in the ocular surface symptoms and function, AOPT has a better therapeutic effect on the treatment of meibomian gland dysfunction, but it has more adverse reactions. Therefore, optimal treatment plan should be fully selected in combination with the actual clinical situation.

Comparison of 7 methods for sample size determination based on confidence interval estimation for a single proportion / 南方医科大学学报

OBJECTIVE@#To compare different methods for calculating sample size based on confidence interval estimation for a single proportion with different event incidences and precisions.@*METHODS@#We compared 7 methods, namely Wald, AgrestiCoull add z2, Agresti-Coull add 4, Wilson Score, Clopper-Pearson, Mid-p, and Jefferys, for confidence interval estimation for a single proportion. The sample size was calculated using the search method with different parameter settings (proportion of specified events and half width of the confidence interval [ω=0.05, 0.1]). With Monte Carlo simulation, the estimated sample size was used to simulate and compare the width of the confidence interval, the coverage of the confidence interval and the ratio of the noncoverage probability.@*RESULTS@#For a high accuracy requirement (ω =0.05), the Mid-p method and Clopper Pearson method performed better when the incidence of events was low (P < 0.15). In other settings, the performance of the 7 methods did not differ significantly except for a poor symmetry of the Wald method. In the setting of ω=0.1 with a very low p (0.01-0.05), failure of iteration occurred with nearly all the methods except for the Clopper-Pearson method.@*CONCLUSION@#Different sample size determination methods based on confidence interval estimation should be selected for single proportions with different parameter settings.

Systematic review of clinical effects of enamel matrix derivative as adjunctive therapy for gingival recession / 口腔疾病防治

Objective @#To evaluate the clinical effect of enamel matrix derivative(EMD) assisted with connective tissue graft(CTG) in the treatment of gingival recession.@*Methods @#Search The Cochrane Library, PubMed, EMbase, Web of Science, Wanfang Public Database,VIP database and CNKI to search for randomized controlled trials of EMD in the treatment of gingival recession. The search period is from the establishment of the databases to October 3, 2022. The test group was treated with EMD+CTG, while the control group was treated with CTG alone. Meta-analyses were performed using Review Manager 5.4.1 and Stat12.0.@*Results@# Meta analysis results showed that only 12 months after treatment, there was a statistically significant difference in the PD and CAL outcome indicators between the EMD assisted treatment group and the control group [MDPD=-0.10, 95% CI (-0.19, -0.01), P = 0.03], [MDCAL=-0.38, 95% CI(-0.71, -0.04), P = 0.03]. There was no significant difference between the test group and the control group in other indicators.@*Conclusion @#EMD assisted CTG in the treatment of gingival recession may be beneficial to the reduction of PD and CAL.