Relación entre la compatibilidad del HLA y la pérdida del injerto en trasplante renal de donante cadavérico: Un análisis por propensity score matching en Colombia / Relationship between HLA compatibility and graft loss in renal transplant from a deceased donor: An analysis by propensity score matching in Colombia

Introducción. En Colombia, solo un 24 % de los pacientes en lista recibieron un trasplante renal, la mayoría de donante cadavérico. Para la asignación de órganos se considera el HLA A-B-DR, pero la evidencia reciente sugiere que el HLA A-B no está asociado con los desenlaces del trasplante. El objetivo de este estudio fue evaluar la relevancia del HLA A-B-DR en la sobrevida del injerto de los receptores de trasplante renal. Métodos. Estudio de cohorte retrospectivo que incluyó pacientes trasplantados renales con donante cadavérico en Colombiana de Trasplantes, desde 2008 a 2023. Se aplicó un propensity score matching (PSM) para ajustar las covariables en grupos de comparación por compatibilidad y se evaluó la relación del HLA A-B-DR con la sobrevida del injerto renal por medio de la prueba de log rank y la regresión de Cox. Resultados. Se identificaron 1337 pacientes transplantados renales, de los cuales fueron mujeres un 38,7 %, con mediana de edad de 47 años y de índice de masa corporal de 23,8 kg/m2. Tras ajustar por PSM las covariables para los grupos de comparación, la compatibilidad del HLA A-B no se relacionó significativamente con la pérdida del injerto, con HR de 0,99 (IC95% 0,71-1,37) para HLA A y 0,75 (IC95% 0,55-1,02) para HLA B. Solo la compatibilidad por HLA DR fue significativa para pérdida del injerto con un HR de 0,67 (IC95% 0,46-0,98). Conclusión. Este estudio sugiere que la compatibilidad del HLA A-B no influye significativamente en la pérdida del injerto, mientras que la compatibilidad del HLA DR sí mejora la sobrevida del injerto en trasplante renal con donante cadavérico

Introduction. In Colombia, only 24% of patients on the waiting list received a renal transplant, most of them from cadaveric donors. HLA A-B-DR is considered for organ allocation, but recent evidence suggests that HLA A-B is not associated with transplant outcomes. The objective of this study was to evaluate the relevance of HLA A-B-DR on graft survival in kidney transplant recipients. Methods. Retrospective cohort study that included kidney transplant recipients with a cadaveric donor in Colombiana de Trasplantes from 2008 to 2023. A propensity score matching (PSM) was applied to adjust the covariates in comparison groups for compatibility, and the relationship of HLA A-B-DR with kidney graft survival was evaluated using the log rank test and Cox regression. Results. A total of 1337 kidney transplant patients were identified; of those, 38.7% were female, with median age of 47 years, and BMI 23.8 kg/m2. After adjusting the covariates with PSM for the comparison groups, HLA A-B matching was not significantly related to graft loss, with HR of 0.99 (95% CI 0.71-1.37) and 0.75 (95% CI 0.55-1.02), respectively. Only HLA DR matching was significant for graft loss with an HR of 0.67 (95% CI 0.46-0.98). Conclusions. This study suggests that HLA A-B matching does not significantly influence graft loss, whereas HLA DR matching does improve graft survival in renal transplantation with a cadaveric donor.

Factores que influyen en la supervivencia de pacientes con diálisis en El Salvador / Influencing Factors in the Survival of Dialysis Patients in El Salvador

Introducción. La enfermedad renal crónica es responsable de aproximadamente 2,4 millones de defunciones a nivel mundial. La supervivencia a los cinco años después de iniciar diálisis se encuentra entre un 39 a 60 % dependiendo del país. Objetivo. Describir la situación epidemiológica de los pacientes con diálisis y analizar los factores que influyen en la supervivencia de pacientes a cinco años de iniciar tratamiento sustitutivo renal en El Salvador. Metodología. Estudio de cohorte retrospectivo de los pacientes incluidos en el Registro Nacional de Diálisis y Trasplante Renal desde enero de 2016 hasta febrero de 2023. El seguimiento se comenzó al inicio de la diálisis, el evento de interés fue la muerte del paciente. Se utilizó el método de Kaplan-Meier para determinar la supervivencia al año y a los cinco años y la regresión de Cox con el modelo de Royston-Parmar para analizar los factores que influyen sobre la supervivencia a los cinco años. Resultados. El estudio incluyó 7088 pacientes, la supervivencia a uno y cinco años fue del 79,5 % (IC 95 %: 78,6-80,5) y 50,6 % (IC 95 %: 49,1-52,1) respectivamente. La regresión de Cox para la edad de inicio de tratamiento resultó en un hazard ratio de 1,02 (IC 95 %: 1,01-1,02), mientras que para el oficio de ser agricultor el hazard ratio fue 1,1 (IC 95 %: 1,01-1,18) y para la etiología hipertensiva el hazard ratio fue de 0,7 (IC 95 %: 0,64-0,78). Conclusión. La edad de inicio de tratamiento y el ser agricultor están asociados con una menor supervivencia a cinco años en pacientes con diálisis

Introduction. The chronic kidney disease is responsible for approximately 2.4 million deaths worldwide, in El Salvador during 2019 death rate was 72.9 for 100 000 habitants, five year survival in patients after starting dialysis was between 39 and 60 % depending on the country. Objective. Analyze the factors that influence the five years survival in patients after starting renal replacement therapy in El Salvador. Methodology. It is a retrospective cohort study from patients included in dialysis and renal replacement therapy national registry from January 2016 to February 2023, the start point for the following was the initiation of dialysis, the event of interest was patient ́s death, the Kaplan-Meier method was used to determine one year and five year survival; and Cox regression with Royston-Parmar model was used to analyze the factors that influence survival. Results. The study included 7088 patients, one and five-years survival was 79.5 % (CI 95 %: 78.6-80.5) and 50.6 % (CI 95 %: 49.1-52.1) respectively. The Cox regression for age of treatment initiation resulted in a hazard ratio of 1.02 (CI 95 %: 1.01-1.02), while for farmers, the hazard ratio was 1.09 (CI 95 %: 1.00-1.18), for hypertensive etiology the hazard ratio was 0.7 (CI 95 %: 0.64-0.78). Conclusion. Data suggest that age of treatment initiation, and jobs related to agriculture were associated with less five year survival in dialysis patients.

Sociodemographic inequalities in the incidence of COVID-19 in National Household Sample Survey cohort, Brazil, 2020 / Desigualdades sociodemográficas na incidência de COVID-19 em coorte da Pesquisa Nacional por Amostra de Domicílios, Brasil, 2020

ABSTRACT Objective: To verify the association between sociodemographic factors and the time until the occurrence of new cases of COVID-19 and positive tests for SARS-CoV-2 in Brazil, during the period from May to November 2020, based on a cohort of Brazilians participating in the COVID-19 National Household Sample Survey. Methods: A concurrent and closed cohort was created using monthly data from the PNAD COVID-19, carried out via telephone survey. A new case was defined based on the report of the occurrence of a flu-like syndrome, associated with loss of smell or taste; and positivity was defined based on the report of a positive test, among those who reported having been tested. Cox regression models were applied to verify associations. The analyzes took into account sample weighting, calibrated for age, gender and education distribution. Results: The cumulative incidence of cases in the overall fixed cohort was 2.4%, while that of positive tests in the fixed tested cohort was 27.1%. Higher incidences were observed in the North region, in females, in residents of urban areas and in individuals with black skin color. New positive tests occurred more frequently in individuals with less education and healthcare workers. Conclusion: The importance of prospective national surveys is highlighted, contributing to detailed analyzes of social inequalities in reports focused on public health policies.

RESUMO Objetivo: Verificar a associação entre fatores sociodemográficos e o tempo até a ocorrência de novos casos de COVID-19 e de testes positivos para Sars-CoV-2 no Brasil, durante o período de maio a novembro de 2020, com base em uma coorte dos brasileiros participantes da Pesquisa Nacional por Amostra de Domicílios COVID-19. Métodos: Foi constituída uma coorte concorrente e fechada utilizando dados mensais da Pnad COVID-19, realizada por inquérito telefônico. Um caso novo foi definido com base no relato da ocorrência de um quadro de síndrome gripal, associado à perda de olfato ou paladar; e a positividade foi definida com base no relato de um teste positivo, entre os que referiram ter sido testados. Foram aplicados modelos de regressão de Cox para verificar associações, considerando a ponderação amostral, calibrada para a distribuição etária, de sexos e de escolaridade. Resultados: A incidência acumulada de casos na coorte fixa geral foi de 2,4%, enquanto a de testes positivos na coorte fixa testada foi de 27,1%. Verificou-se maiores riscos nas regiões Centro-Oeste, Norte e Nordeste, entre mulheres, residentes em áreas urbanas, pessoas com escolaridade até o ensino médio, com a cor da pele declarada como preta e trabalhadores da área da saúde. Indivíduos com menor escolaridade e profissionais de saúde apresentaram maior frequência de novos testes positivos. Novos testes positivos ocorreram com maior frequência em indivíduos com menor escolaridade e trabalhadores da área da saúde. Conclusão: Foram observados riscos desiguais entre os estratos populacionais comparados. Destaca-se a importância da realização de inquéritos nacionais prospectivos na investigação de iniquidades em saúde.

Ascending Aortic Surgery for Small Aneurysms in Men and Women

ABSTRACT Introduction: According to recent data, thoracic aortic surgery has reduced morbidity and mortality including ascending aortic aneurysm treatment; however, women are at increased postoperative risk of adverse outcomes. Objective: Our aim was to evaluate early and late outcomes in male and female patients who underwent pre-emptive ascending aortic replacement (AAR). Methods: From January 2013 to September 2021, 91 patients (56 [61.5%] men and 35 [38.5%] women) underwent AAR for small (ranged from 5.0 to 5.5 cm) non-syndromic aneurysms. A propensity score-based adjustment of the groups was performed. We compared clinical outcomes between males and females. Results: Preoperative normalized aortic diameters were significantly larger in females (2.9 [2.7; 3.2] cm/m2) than in males (2.5 [2.3; 2.6] cm/m2, P<0.001), without differences in absolute values (51 [49; 53] mm vs. 52 [50; 53] mm, P=0.356). There were no significant differences in neurological, cardiac, pulmonary, and renal complications in both groups before and after matching. In-hospital mortality was 1 (1.8%) and 2 (5.7%) (P=0.307) in male and female patients in unmatched groups and 1 (2.9%) and 2 (5.7%) (P=0.553) in matched groups, respectively. Univariate logistic regression analysis revealed that the only risk factor for in-hospital mortality was age (odds ratio 1.117, 95% confidence interval 1.003-1.244; P=0.04). The overall survival rate was 83.5±0.06% in men and 94.3±0.04% in women at 36 months (P=0.404). Conclusion: Ascending aortic surgery for aneurysms ranged from 5.0 to 5.5 cm seems to have tolerable early and late outcomes in men and women.

Comprehensive Analysis of CLCA1 Expression, Immune Infiltration and Immune Checkpoints in Colon Adenocarcinoma / Análisis Completo de la Expresión de CLCA1, Infiltración Inmune y Puntos de Control Inmunológico en Colonadenocarcinoma

SUMMARY: Colon adenocarcinoma (COAD) is a prevalent disease worldwide, known for its high mortality and morbidity rates. Despite this, the extent of investigation concerning the correlation between COAD's CLCA1 expression and immune cell infiltration remains insufficient. This study seeks to examine the expression and prognosis of CLCA1 in COAD, along with its relationship to the tumor immune microenvironment. These findings will offer valuable insights for clinical practitioners and contribute to the existing knowledge in the field. In order to evaluate the prognostic significance of CLCA1 in individuals diagnosed with colorectal cancers, we conducted a comprehensive analysis using univariate and multivariate Cox regression models along with receiver operating characteristic curve (ROC) analysis. This study was performed on the patient data of COAD obtained from The Cancer Genome Atlas (TCGA) database. Nomograms were developed to anticipate CLCA1 prognostic influence. Furthermore, the CLCA1 association with tumor immune infiltration, immune checkpoints, immune checkpoint blockade (ICB) response, interaction network, and functional analysis of CLCA1-related genes was analyzed. We found that Colon adenocarcinoma tissues significantly had decreased CLCA1 expression compared to healthy tissues. Furthermore, the study revealed that the group with high expression of CLCA1 demonstrated a significantly higher overall survival rate (OS) as compared to the group with low expression. Multivariate and Univariate Cox regression analysis revealed the potential of CLCA1 as a standalone risk factor for COAD. These results were confirmed using nomograms and ROC curves. In addition, protein-protein interaction (PPI) network analysis and functional gene enrichment showed that CLCA1 may be associated with functional activities such as pancreatic secretion, estrogen signaling and cAMP signaling, as well as with specific immune cell infiltration. Therefor, as a new independent predictor and potential biomarker of COAD, CLCA1 plays a crucial role in the advancement of colon cancer.

El adenocarcinoma de colon (COAD) es una enfermedad prevalente a nivel mundial, conocida por sus altas tasas de mortalidad y morbilidad. Sin embargo, el alcance de la investigación sobre la correlación entre la expresión de CLCA1 de COAD y la infiltración de células inmunes sigue siendo insuficiente. Este estudio busca examinar la expresión y el pronóstico de CLCA1 en COAD, junto con su relación con el microambiente inmunológico del tumor. Estos hallazgos ofrecerán conocimientos valiosos para los profesionales clínicos y contribuirán al conocimiento existente en el campo. Para evaluar la importancia de pronóstico de CLCA1 en personas diagnosticadas con cáncer colorrectal, realizamos un análisis exhaustivo utilizando modelos de regresión de Cox univariados y multivariados junto con un análisis de la curva característica operativa del receptor (ROC). Este estudio se realizó con los datos de pacientes de COAD obtenidos de la base de datos The Cancer Genome Atlas (TCGA). Se desarrollaron nomogramas para anticipar la influencia pronóstica de CLCA1. Además, se analizó la asociación de CLCA1 con la infiltración inmunitaria tumoral, los puntos de control inmunitarios, la respuesta de bloqueo de los puntos de control inmunitarios (ICB), la red de interacción y el análisis funcional de genes relacionados con CLCA1. Descubrimos que los tejidos de adenocarcinoma de colon tenían una expresión significativamente menor de CLCA1 en comparación con los tejidos sanos. Además, el estudio reveló que el grupo con alta expresión de CLCA1 demostró una tasa de supervivencia general (SG) significativamente mayor en comparación con el grupo con baja expresión. El análisis de regresión de Cox multivariado y univariado reveló el potencial de CLCA1 como factor de riesgo independiente de COAD. Estos resultados se confirmaron mediante nomogramas y curvas ROC. Además, el análisis de la red de interacción proteína- proteína (PPI) y el enriquecimiento de genes funcionales mostraron que CLCA1 puede estar asociado con actividades funcionales como la secreción pancreática, la señalización de estrógenos y la señalización de AMPc, así como con la infiltración de células inmunes específicas. Por lo tanto, como nuevo predictor independiente y biomarcador potencial de COAD, CLCA1 desempeña un papel crucial en el avance del cáncer de colon.

Desempenho do Escore SHARPEN e do Índice de Comorbidade de Charlson para Predição de Mortalidade durante a Internação Hospitalar e após a Alta na Endocardite Infecciosa / Performance of the SHARPEN Score and the Charlson Comorbidity Index for In-Hospital and Post-Discharge Mortality Prediction in Infective Endocarditis

Resumo Fundamento O SHARPEN foi o primeiro escore desenvolvido especificamente para a predição de mortalidade hospitalar em pacientes com endocardite infecciosa (EI), independentemente da realização de cirurgia cardíaca. Objetivos Analisar a capacidade do escore SHARPEN na predição de mortalidade hospitalar e mortalidade após a alta e compará-la à do Índice de Comorbidade de Charlson (ICC). Métodos Estudo retrospectivo do tipo coorte incluindo internações por EI (segundo os critérios de Duke modificados) entre 2000 e 2016. A área sob a curva ROC (AUC-ROC) foi calculada para avaliar a capacidade preditiva. Curvas de Kaplan-Meier e regressão de Cox foram realizadas. Um valor de p < 0,05 foi considerado estatisticamente significativo. Resultados Estudamos 179 internações hospitalares. A mortalidade hospitalar foi 22,3%; 68 (38,0%) foram submetidos à cirurgia cardíaca. Os escores SHARPEN e ICC (mediana e intervalo interquartil) foram, respectivamente, 9(7-11) e 3(2-6). O escore SHARPEN mostrou melhor predição de mortalidade hospitalar em comparação ao ICC nos pacientes não operados (AUC-ROC 0,77 vs. 0,62, p = 0,003); não foi observada diferença no grupo total (p=0,26) ou nos pacientes operados (p=0,41). Escore SHARPEN >10 na admissão foi associado a uma menor sobrevida hospitalar no grupo total (HR 3,87; p < 0,001), nos pacientes não operados (HR 3,46; p = 0,006) e de pacientes operados (HR 6,86; p < 0,001) patients. ICC > 3 na admissão foi associada a pior sobrevida hospitalar nos grupos total (HR 3,0; p = 0,002), de pacientes operados (HR 5,57; p = 0,005), mas não nos pacientes não operados (HR 2,13; p = 0,119). A sobrevida após a alta foi pior nos pacientes com SHARPEN > 10 (HR 3,11; p < 0,001) e ICC > 3 (HR 2,63; p < 0,001) na internação; contudo, não houve diferença na capacidade preditiva entre esses grupos. Conclusão O SHARPEN escore foi superior ao ICC na predição de mortalidade hospitalar nos pacientes não operados. Não houve diferença entre os escores quanto à mortalidade após a alta.

Abstract Background SHARPEN was the first dedicated score for in-hospital mortality prediction in infective endocarditis (IE) regardless of cardiac surgery. Objectives To analyze the ability of the SHARPEN score to predict in-hospital and post-discharge mortality and compare it with that of the Charlson comorbidity index (CCI). Methods Retrospective cohort study including definite IE (Duke modified criteria) admissions from 2000 to 2016. The area under the ROC curve (AUC-ROC) was calculated to assess predictive ability. Kaplan-Meier curves and Cox regression was performed. P-value < 0.05 was considered statistically significant. Results We studied 179 hospital admissions. In-hospital mortality was 22.3%; 68 (38.0%) had cardiac surgery. Median (interquartile range, IQR) SHARPEN and CCI scores were 9(7-11) and 3(2-6), respectively. SHARPEN had better in-hospital mortality prediction than CCI in non-operated patients (AUC-ROC 0.77 vs. 0.62, p = 0.003); there was no difference in overall (p = 0.26) and in operated patients (p = 0.41). SHARPEN > 10 at admission was associated with decreased in-hospital survival in the overall (HR 3.87; p < 0.001), in non-operated (HR 3.46; p = 0.006) and operated (HR 6.86; p < 0.001) patients. CCI > 3 at admission was associated with worse in-hospital survival in the overall (HR 3.0; p = 0.002), and in operated patients (HR 5.57; p = 0.005), but not in non-operated patients (HR 2.13; p = 0.119). Post-discharge survival was worse in patients with SHARPEN > 10 (HR 3.11; p < 0.001) and CCI > 3 (HR 2.63; p < 0.001) at admission; however, there was no difference in predictive ability between these groups. Conclusion SHARPEN was superior to CCI in predicting in-hospital mortality in non-operated patients. There was no difference between the scores regarding post-discharge mortality.

Results of transarterial chemoembolization of hepatocellular carcinoma as a bridging therapy to liver transplantation / Resultados da quimioembolização transarterial do carcinoma hepatocelular como terapia ponte para transplante de fígado

Abstract Objective: To evaluate the degree of tumor necrosis after transarterial chemoembolization (TACE), used as a bridging therapy in patients awaiting liver transplantation, and its effect on survival. Materials and Methods: This was a retrospective cohort study involving 118 patients submitted to TACE prior to liver transplantation, after which the degree of tumor necrosis in the explant and post-transplant survival were evaluated. Results: Total necrosis of the neoplastic nodule in the explant was observed in 76 patients (64.4%). Of the patients with total necrosis in the explanted liver, 77.8% had presented a complete response on imaging examinations. Drug-eluting bead TACE (DEB-TACE), despite showing a lower rate of complications than conventional TACE, provided a lower degree of total necrosis, although there was no statistical difference between the two. By the end of the study period, 26 of the patients had died. Survival was longer among the patients with total necrosis than among those with partial or no necrosis (HR = 2.24 [95% CI: 0.91-5.53]; p = 0.078). Conclusion: In patients undergoing TACE as a bridging therapy, total tumor necrosis appears to be associated with improved patient survival.

Resumo Objetivo: Avaliar os resultados da necrose tumoral após quimioembolização transarterial (TACE) como terapia ponte e seu reflexo na sobrevida dos pacientes. Materiais e Métodos: Estudo de coorte retrospectivo, com 118 pacientes que realizaram TACE, em que foram avaliados o grau de necrose tumoral no explante e a sobrevida pós-transplante. Resultados: Necrose total do nódulo neoplásico no explante foi observada em 76 pacientes (64,4%). Observou-se que 77,8% dos pacientes com necrose total no explante hepático tinham apresentado resposta completa nos exames de imagem. A DEB-TACE, apesar de ter demonstrado menor taxa de intercorrências, proporcionou menor grau de necrose total em relação à TACE convencional, a despeito de não haver diferença estatística. Ao final do seguimento do estudo, o número de óbitos foi de 26. A sobrevida foi maior nos pacientes que tiveram necrose total quando comparada com grau de necrose parcial ou ausência de necrose [HR = 2,24 (IC 95%: 0,91-5,53); p = 0,078]. Conclusão: Necrose completa do tumor nos pacientes submetidos a TACE como terapia ponte parece estar associada com melhora da sobrevida.

Mortalidad de pacientes internados por pie diabético en un hospital de Costa Rica (2017-2019) / Mortality of inpatients due to diabetic foot in a hospital in Costa Rica (2017-2019)

Resumen Objetivo: Identificar factores clínicos y sociodemográficos asociados a la mortalidad en los pacientes internados por pie diabético, en la Unidad de Pie Diabético del Hospital San Juan de Dios de Costa Rica, del año 2017 al 2019. Materiales y métodos: Estudio de cohorte retrospectivo con 238 pacientes, seguidos desde su internamiento hasta la muerte o al 31 de diciembre del 2021 aún vivos. Análisis descriptivo a variables sociodemográficas, clínicas y causas de muerte. Modelo de riesgos proporcionales de Cox para todas las causas de muerte, y otro exclusivo para muerte por causa cardiovascular. Tiempos de supervivencia se analizan por curvas de Kaplan-Meier, con la prueba de log-Rank para comparar curvas. Resultados: Mayoría de los fallecidos eran hombres, no contaban con pareja, residían en zona urbana o predominantemente urbana, de 15 años o más de ser diabéticos, hipertensos, con enfermedad arterial periférica, anemia, hemoglobina glicosilada inadecuada y obesidad. La tasa de mortalidad fue 23,53%, y la principal causa de muerte fue la enfermedad cardiovascular (35,70 %). Las variables asociadas con mortalidad por todas las causas, ajustadas por edad y sexo fueron: ausencia de pareja (HR: 13,09; IC 95 %: 4,04-42,31), obesidad (HR: 2,89; IC 95 %: 1,59-5,27), enfermedad arterial periférica (HR: 2,26; IC 95 %: 1,25-4,09), años de evolución de la diabetes mellitus ≥ 15 años (HR: 1,99; IC 95 %: 1,04-3,82). A su vez, para mortalidad cardiovascular fueron: obesidad (HR: 6,42; IC 95 %: 2,07-19,87), enfermedad arterial periférica (HR: 3,88; IC 95 %: 1,39-10,79) y cardiopatía (HR: 4,11; IC 95 %: 1,62-10,46). Conclusiones: Años de evolución de la diabetes mellitus mayor o igual a 15 años, no contar con pareja; la obesidad y enfermedad arterial periférica se asoció a mortalidad por todas las causas. Respecto a muerte por enfermedad cardiovascular, las variables asociadas fueron obesidad, enfermedad arterial periférica y cardiopatía.

Abstract Objective: To identify clinical and sociodemographic factors associated with mortality in patients hospitalized for diabetic foot, in the Diabetic Foot Unit of the San Juan de Dios Hospital in Costa Rica, from 2017 to 2019. Materials and methods: A retrospective cohort study with 238 patients, followed from hospitalization until death or until December 31, 2021, still alive. A descriptive analysis is made of the sociodemographic, clinical, and cause of death variables. A Cox proportional hazards model is run for all causes of death, and another exclusively for death from cardiovascular causes. Survival times are analyzed using Kaplan-Meier curves, with the log-rank test for comparison. Results: Most of the deceased were men, did not have a partner, lived in urban or predominantly urban areas, were 15 years or older, diabetic, hypertensive, with peripheral arterial disease, anemia, inadequate glycosylated hemoglobin, and obesity. The mortality rate was 23,53%, and cardiovascular disease was the main cause of death (35,70%). The variables associated with all-cause mortality, adjusted for age and sex were: absence of a partner (HR: 13,09; 95% CI: 4,04-42,31), obesity (HR: 2,89; 95% CI %: 1,59-5,27), peripheral arterial disease (HR: 2,26; CI 95%: 1,25-4,09), years of evolution of diabetes mellitus ≥ 15 years (HR: 1,99; CI 95 %: 1,04-3,82). In turn, for cardiovascular mortality were: obesity (HR: 6,42; 95% CI: 2,07-19,87), peripheral arterial disease (HR: 3,88; 95% CI: 1,39-10,79) and heart disease (HR: 4,11; 95% CI: 1,62-10,46). Conclusions: Evolution of diabetes mellitus greater than or equal to 15 years, not having a partner, obesity and peripheral arterial disease were associated with all-cause mortality. Regarding death from cardiovascular disease, the associated variables were obesity, peripheral arterial disease, and heart disease.

Overall and Event Free Survival of Childhood Cancer - Report From a Hospital-based Cancer Registry in Northern India, 2013-21

Objectives: Using data from a hospital-based cancer registry (HBCR) in the private sector in Northern India, we provide overall survival (OS) and event-free survival (EFS) for childhood cancer patients. Methods: All newly diagnosed childhood (age <18 years) cancer patients in our HBCR registered between March 1, 2013 till July 31, 2021 were eligible. 3-year and 5-year OS (death was an event), EFSc (death, progression/relapse was an event), and EFSa (death, progression/relapse, abandonment of treatment was an event) were calculated using the Kaplan-Meier method. Regression analysis was done to see their association with demographic, diagnostic and treatment variables. Results: 705 newly diagnosed children (36.2% female) with cancer were registered. Common cancers were leukemias (26%), CNS tumors (20%) and bone tumors (16%). 202 (28.6%) had experienced an event at median follow up of 1.95 years (range 0-8.14 years), which included 23 (3.3%) who abandoned treatment. The 3- year OS, EFSc, EFSa were 70.8%, 64.4% and 63.6%, respectively. Correspondingly, 5-year OS, EFSc, EFSa were 66%, 58.6% and 57.5%, respectively. There was no significant difference by age group, gender, nationality, and if cancer directed treatment initiated elsewhere. The OS, EFSa and EFSc by the main and the extended International Childhood Cancer Classification categories varied significantly (P<0.001). Conclusion: We add more recent registry-based OS data on childhood cancer in India and present the first estimates on EFS.

Supervivencia a dos años en pacientes con cáncer gástrico localmente avanzado en una institución de Popayán entre 2018 y 2020 / Two-year survival in patients with locally advanced gastric cancer at an institution in Popayán between 2018 and 2020

Introducción. El tratamiento oncológico perioperatorio en pacientes con cáncer gástrico localmente avanzado está indicado; aun así, no siempre es posible. El objetivo de este estudio fue evaluar la supervivencia de los pacientes según la administración de quimioterapia perioperatoria. Métodos. Estudio observacional, tipo cohorte ambispectivo, incluyendo pacientes con cáncer gástrico localmente avanzado quienes recibieron o no quimioterapia perioperatoria. Resultados. Se incluyeron 33 pacientes, 90,9 % pertenecían al régimen subsidiado de salud y el 78,8 % en estadio T4. El grupo que recibió quimioterapia perioperatoria, que solo tuvo 5 pacientes (15,1 %), presentó mayor supervivencia global a 2 años (100 %), seguido del grupo de quimioterapia postoperatoria (58,8 %) y del grupo sin quimioterapia, que alcanzó una supervivencia global a 2 años de 54,5 %. Discusión. La supervivencia global fue mayor en el grupo de quimioterapia perioperatoria, consonante a lo descrito a nivel internacional, aunque los pacientes se encontraban en un estadío localmente más avanzado, la mayoría con T4 y N+ según AJCC VIII edición. Conclusiones. El estadío clínico es un factor pronóstico importante y, en nuestro medio, la mayoría de los pacientes consultan en estadíos localmente más avanzados. A eso se suman las dificultades en el acceso a la atención en salud. Aun así, la quimioterapia perioperatoria mostró una supervivencia mayor en pacientes con cáncer gástrico localmente avanzado

Introduction. Perioperative cancer treatment in patients with locally advanced gastric cancer is indicated; even so, it is not always possible. The objective was to evaluate survival according to time and receipt of perioperative chemotherapy. Methods. Observational study, ambispective cohort type, including patients with locally advanced gastric cancer who received or did not receive perioperative chemotherapy. Results. Thirty-three patients were included, 90.9% belonged to the subsidized regimen and 78.8% with TNM T4. The perioperative chemotherapy group, which only had five patients (15.1%), had a higher overall survival at 2 years (100%), followed by the postoperative chemotherapy group and by the group without chemotherapy, with an overall survival at 2 years of 58.8% and 54.5%, respectively. Discussion. Overall survival was higher in the perioperative chemotherapy group, consistent with what has been described internationally, although the patients were in a more advanced stage, most being with T4 and N+ according to the AJCC VIII edition. Conclusions. The clinical stage is an important prognostic factor and in our environment, most patients consult in more advanced stages, coupled with difficulties in accessing health care. Even so, perioperative chemotherapy showed a longer survival in patients with locally advanced gastric cancer, the data should not be extrapolated since the number of patients in each group is significantly different

Survival analysis and predictors of long-term outcomes following radical nephrectomy with inferior vena cava (IVC) thrombectomy in renal cell carcinoma

Background: Renal cell carcinoma (RCC) presents with inferior vena cava (IVC) thrombus in 10%�% cases and surgical management forms the mainstay of the treatment. The objective of this study is to assess the outcomes of the patients undergoing radical nephrectomy with IVC thrombectomy. Methods: A retrospective analysis of patients undergoing open radical nephrectomy with IVC thrombectomy between 2006 till 2018 was done. Results: A total of 56 patients were included. The mean (眘tandard deviation) age was 57.1 (�.2) years. The number of patients with levels I, II, III, and IV thrombus were 4, 29,10, and 13, respectively. The mean blood loss was 1851.8 mL, and the mean operative time was 303.3 minutes. Overall, the complication rate was 51.7%, while the perioperative mortality rate was 8.9%. The mean duration of hospital stay was 10.6 � 6.4 days. The majority of the patients had clear cell carcinoma (87.5%). There was a significant association between grade and stage of thrombus (P = 0.011). Using Kaplan朚eier survival analysis, the median overall survival (OS) was 75 (95% confidence interval [CI] = 43.5�6.5) months, and the median recurrence-free survival (RFS) was 48 (95% CI = 33.1�.3) months. Age (P = 0.03), presence of systemic symptoms (P = 0.01), radiological size (P = 0.04), histopathological grade (P = 0.01), level of thrombus (P = 0.04), and invasion of thrombus into IVC wall (P = 0.01) were found to be significant predictors of OS. Conclusion: The management of RCC with IVC thrombus poses a major surgical challenge. Experience of a center along with high-volume and multidisciplinary facility particularly cardiothoracic facility provides better perioperative outcome. Though surgically challenging, it offers good overall-survival and recurrence-free survival

Cirugía de revascularización miocárdica: comparación de supervivencia a 10 años de la cirugía coronaria con y sin circulación extracorpórea mediante Propensity Score Matching / Ten-year survival after off-pump coronary artery bypass grafting compared with traditional bypass grafting

BACKGROUND: Long-term outcomes of Off-Pump Coronary Artery Bypass Grafting (OPCAB) as an alternative to the traditional Coronary Artery Bypass Grafting (CABG) technique with cardiopulmonary bypass (CPB) are not well defined. AIM: To compare 10-year survival of isolated OPCAB versus CABG with CPB. MATERIAL AND METHODS: Analysis of information obtained from databases, clinical records and surgical protocols of patients treated with isolated CABG between January 2006 and November 2008 at a Regional Hospital. Of 658 isolated CABG, 192 (29.2%) were OPCAB and 466 (79.9%) CPB. Propensity Score Matching (PSM) was performed to compare both groups. After PSM, two groups of 192 cases were obtained. Mortality data was obtained from the Chilean public identification service. Ten-year survival was calculated and compared with Kaplan-Meier and log-rank methods. RESULTS: Follow-up data was obtained in all cases. No statistically significant differences were found when comparing 10-year survival between OPCAB versus CPB (78.6% and 80.2% respectively, p 0.720). There was also no statistical difference in cardiovascular death free survival (90.1% with CPB versus 89.1% OPCAB, p 0.737). Survival was comparable when analyzing subgroups with diabetes mellitus, left ventricular dysfunction or chronic kidney disease, among others. CONCLUSIONS: In our series, OPBAB has a comparable 10-year survival with CABG with CPB.

Sobrevida en población pediátrica con leucemia linfoblástica aguda tratada con protocolo ALLIC-BFM de quimioterapia. Revisión sistemática / Survival of pediatric population with acute lymphoblastic leukemia treated with ALLIC-BFM chemotherapy protocol. Systematic review

La leucemia linfoblástica aguda constituye la neoplasia infantil más frecuente. Los tratamientos actuales posibilitan más del 80% de supervivencia libre de enfermedad por cinco años. En el 2000, se probó un protocolo de quimioterapia llamado leucemia linfoblástica intercontinental Berlín-Frankfurt-Münster (ALLIC BFM). El proceso investigativo se realizó mediante la metodología PRISMA, con el propósito de sistematizar la información acerca de la supervivencia de los pacientes pediátricos con leucemia linfoblástica aguda tratados con el uso del protocolo de quimioterapia ALLIC BFM en sus versiones de 2002 o 2009. La supervivencia global en pacientes donde se utilizó el protocolo de 2002 fue del 52% al 91,7% y la libre de enfermedad fue del 45% a 83,3%; mientras que, con el uso del protocolo 2009 se reportó una supervivencia global del 71,1% al 90% y la libre de enfermedad fue del 69,4% al 90,3%. Los principales factores que afectaron la supervivencia fueron las complicaciones relacionadas con el tratamiento, los pacientes de alto riesgo y la medicación insuficiente.

Acute lymphoblastic leukemia is the most common childhood neoplasia. Current treatments allow more than 80% disease-free survival for five years. In 2000, a chemotherapy protocol called Berlin-Frankfurt-Münster intercontinental lymphoblastic leukemia (ALLIC BFM) was tested. The investigative process was carried out using the PRISMA methodology. This study aimed to systematize the information about the survival of pediatric patients with acute lympho-blastic leukemia treated with the ALLIC BFM chemotherapy protocol in its 2002 or 2009 versions. 52% to 91.7% of patients showed an overall survival in patients where the 2002 proto-col was used, and disease-free was from 45% to 83.3%; while, with the use of the 2009 protocol, an overall survival of 71.1% to 90% was reported, and disease-free survival was 69.4% to 90.3%. The main factors affecting survival were treatment-related complications, high-risk patients, and insufficient medication.

Failure mode and long-term survival after neoadjuvant therapy for locally advanced esophageal squamous cell carcinoma / 中华放射肿瘤学杂志

Objective:To analyze the fail mode of neoadjuvant therapy combined with surgery for locally advanced esophageal squamous cell carcinoma (ESCC) after long-term follow-up.Methods:Clinical data of consecutive 238 patients with locally advanced resectable ESCC who underwent neoadjuvant therapy combined with surgery in Zhejiang Cancer Hospital from September 2012 to October 2019 were retrospectively analyzed. The failure mode in the whole cohort was analyzed after long-term follow-up. The overall survival (OS) and disease free survival (DFS) rates were analyzed by Kaplan-Meier method. Survival differences were determined by log-rank test.Results:The pathological complete response (pCR) rate was 42.0% in 238 patients. After a median follow-up of 46.1 months, tumor progression occurred in 96 patients (40.3%), including 25 patients (10.5%) with local recurrence, 61 patients (25.6%) with distant metastases, and 10 patients (4.2%) with simultaneous local recurrence and distant metastases. The median OS and DFS were 64.7 months and 49.9 months. And the 3-, 5-, and 7-year OS and DFS rates were 70.0%, 52.8%, 36.4% and 63.5%, 42.5%, and 30.0%, respectively. The 3-, 5-, and 7-year locoregional recurrence-free survival rates and distant metastasis-free survival rates were 86.0%, 71.4%, 61.2% and 70.6%, 55.9%, 43.0%. Compared with non-pCR patients, the overall progression rate and distant metastasis rate of pCR patients were lower (26.0% vs. 50.7%, 16.0% vs. 32.6%, both P<0.05). And the 3-, 5-, and 7-year OS (83.0% vs. 60.2%, 69.7% vs. 41.7%, 50.4% vs. 27.7%, all P<0.001) and DFS rates (80.4% vs. 51.4%, 63.9% vs. 31.2%, 45.9% vs. 20.3%, all P<0.001) were significantly better in pCR patients. Conclusions:Distant metastasis is the main failure mode of patients with locally advanced ESCC after neoadjuvant therapy. Patients with postoperative pCR can achieve better long-term survival.

Comparison of prediction ability of two extended Cox models in nonlinear survival data analysis / 南方医科大学学报

OBJECTIVE@#To compare the predictive ability of two extended Cox models in nonlinear survival data analysis.@*METHODS@#Through Monte Carlo simulation and empirical study and with the conventional Cox Proportional Hazards model and Random Survival Forests as the reference models, we compared restricted cubic spline Cox model (Cox_RCS) and DeepSurv neural network Cox model (Cox_DNN) for their prediction ability in nonlinear survival data analysis. Concordance index was used to evaluate the differentiation of the prediction results (a larger concordance index indicates a better prediction ability of the model). Integrated Brier Score was used to evaluate the calibration degree of the prediction (a smaller index indicates a better prediction ability).@*RESULTS@#For data that met requirement of the proportion risk, the Cox_RCS model had the best prediction ability regardless of the sample size or deletion rate. For data that failed to meet the proportion risk, the prediction ability of Cox_DNN was optimal for a large sample size (≥500) with a low deletion (< 40%); the prediction ability of Cox_RCS was superior to those of other models in all other scenarios. For example data, the Cox_RCS model showed the best performance.@*CONCLUSION@#In analysis of nonlinear low maintenance data, Cox_RCS and Cox_DNN have their respective advantages and disadvantages in prediction. The conventional survival analysis methods are not inferior to machine learning or deep learning methods under certain conditions.

Survival analysis of kidney cancer in Qidong City from 1972 to 2016 / 预防医学

Objective@#To investigate the survival rate and changing trends of kidney cancer patients in Qidong City from 1972 to 2016, so as to provide insights into kidney cancer control.@*Methods@#Data pertaining to the incidence of kidney cancer in Qidong City from 1972 to 2016 were captured from the Qidong Municipal Cancer Registration System, and the final follow-up period was December 31, 2021. The observed survival rate, relative survival rate and standardized relative survival rate of kidney cancer were calculated to analyze the survival of kidney cancer, and the trends in survival were analyzed among kidney cancer patients from 1972 to 2016 using annual percent change (APC).@*Results@# A total of 554 kidney cancer patients were reported in Qidong City from 1972 to 2016. The 1-, 3- and 5-year observed survival rates, relative survival rates and standardized relative survival rates were 62.27%, 50.54% and 44.04%; 64.31%, 55.71% and 51.93%; and 61.71%, 51.90%, and 51.68%, respectively. The 5-year observed survival rate, relative survival rate and standardized relative survival rate of kidney cancer appeared a tendency towards a rise in Qidong City from 1972 to 2016, with APC of 2.83% (t=4.303, P=0.004), 2.82% (t=3.978, P=0.005) and 3.96% (t=5.898, P=0.001), and the 5-year relative survival rate of kidney cancer was comparable between men and women (53.05% vs. 50.40%; χ2=4.872, P=0.676). There was an age-specific 5-year relative survival rate of kidney cancer (χ2=35.144, P<0.001), with the greatest among patients at ages of 35 to 44 years (64.49%) and the lowest at ages of 75 years and older (30.11%).@*Conclusion@#The 5-year survival rate of kidney cancer cases appeared a tendency towards a rise in Qidong City from 1972 to 2016. Further specific interventions, depending on age, are needed for management of kidney cancer.

Determinants of time to viral clearance among SARS-CoV-2 infected individuals at Millennium COVID-19 care center in Ethiopia: A prospective observational study

Background: Understanding the COVID-19 disease course in terms of viral shedding is important to assist in providing a tailored isolation and treatment practice. Therefore, the current study aimed to estimate time to viral clearance and identify determinants among SARS-CoV-2 infected individuals admitted to Millennium COVID-19 Care Center in Ethiopia. Methods: A Prospective observational study was conducted among 360 randomly selected SARS-CoV-2 infected individuals who were on follow up from 2nd June to 5th July 2020. Kaplan Meier plots, median survival times, and Log-rank test were used to describe the data and compare survival distribution between groups. Association between time to viral clearance and determinants was assessed using the Cox proportional hazard survival model, where hazard ratio, P-value, and 95% CI for hazard ratio were used for testing significance Results: The Median time to viral clearance was 16 days. The log-rank test shows that having moderate and severe disease, one or more symptoms at presentation, and presenting with respiratory and constitutional symptoms seems to extend the time needed to achieve viral clearance. The Final Cox regression result shows that the rate of achieving viral clearance among symptomatic patients was 44% lower than patients who were asymptomatic (AHR=0.560, 95% CI=0.322-0.975, p-value=0.040). Conclusions: Presence of symptoms was found to be associated with delayed viral clearance implying that symptomatic patients are more likely to be infectious and therefore, attention should be paid to the practices regarding isolation and treatment of COVID-19 patients.

Difusão da Lei Geral da Micro e Pequena Empresa em municípios paulistas / Difusión de la Ley General de las Micro y Pequeñas Empresas en los municipios de São Paulo / Diffusion of the Micro and Small Business Law in municipalities of São Paulo

Resumo Este artigo tem como objeto de análise a implantação da Lei Complementar nº 123, de 2006 (LC nº 123/2006), que instituiu o Estatuto Nacional da Microempresa e da Empresa de Pequeno Porte (MPE), por municípios paulistas. Utilizou-se o referencial teórico de difusão de políticas públicas tendo como objetivo estudar seu processo de adoção, observando os diferentes contextos e momentos de coerção previstos na legislação federal. Com base nas discussões teóricas relacionadas com o mecanismo de difusão chamado de coerção, respondeu-se a seguinte pergunta: qual é a influência do mecanismo de coerção vertical na difusão da Lei Geral da MPE nos municípios paulistas? A técnica "análise de sobrevivência" foi aplicada para identificar fatores explicativos da difusão da política, considerando variáveis de desenho institucional, políticas e partidárias, efeito vizinhança, necessidade da política, organizações/atores sociais e fatores estruturais. Os resultados demonstram que, conforme varia o desenho institucional de coerção, mudam os fatores explicativos da difusão dessa política na ponta, de modo que os aspectos locais, incluindo atores sociais, fatores regionais e questões estruturais, importam para a difusão, variando conforme o contexto coercitivo.

Resumen Este artículo analiza la implementación de la Ley General de las Micro y Pequeñas Empresas por parte de los municipios de São Paulo. Se utilizó la teoría de la difusión de políticas, con el objetivo de estudiar el proceso de adopción de esta política pública, observando los diferentes contextos y momentos de coerción previstos en la legislación federal. A partir de las discusiones teóricas relacionadas con el mecanismo de difusión denominado coerción, se respondió a la siguiente pregunta: ¿cuál es la influencia del mecanismo de coacción vertical en la difusión de la mencionada ley en los municipios de São Paulo? Se aplicó la técnica de análisis de supervivencia para identificar factores explicativos de la difusión de políticas, considerando variables institucionales, políticas y partidarias, efecto barrio, necesidad de políticas, organizaciones/actores sociales y factores estructurales. Los resultados muestran que a medida que varía el diseño institucional de coerción, los factores explicativos de la difusión de esta política al final cambian, de modo que los aspectos locales, incluidos los actores sociales, los factores regionales y los problemas estructurales importan para la difusión, variando de acuerdo con el contexto coercitivo.

Abstract This article analyzes the implementation of the General Law for Micro and Small Business by municipalities in São Paulo. The theory of policy diffusion was used to study the process of adopting this public policy in the different contexts of coercion. The article presents theoretical discussions on the diffusion mechanism "coercion" and answers the question: what is the influence of the vertical coercion mechanism in the diffusion of the General Law in the municipalities of São Paulo? The survival analysis technique was applied to identify explanatory factors of policy diffusion, considering institutional, political, and party design variables, neighborhood effect, internal needs, organizations/social actors, and structural factors. The results show that as the institutional rules of coercion vary, the explanatory factors of the diffusion change so that local aspects, including social actors, regional factors, and structural issues, matter for the diffusion, varying according to the coercive context.

Survival of young and elderly adults with oral squamous cell carcinoma in a population in northeastern Brazil

To compare the profile and overall survival of young adults and elderly people diagnosed with SCC. Methods: A retrospective study was carried out at a High Complexity Oncology Unit, between 2010 and 2016. A descriptive analysis, a bivariate analysis using the chi-square and Fisher's exact test and the Kaplan-Meier estimator were performed. The predictor variables were tested using the log-rank test and those with statistical significance and the literature were maintained for the Cox regression model. Results: 282 cases of SCC were recorded, with only 12.4% diagnosed in young adults. The profile was similar between groups, with the majority of cases of the disease occurring in males, smokers and alcohol consumers. The lesions predominantly located on the tongue and were diagnosed in an advanced stage of the disease, resulting in 35.7% of deaths. The median survival time was 30 months in the elderly and 31 months in young people. In the multivariate analysis, age was not statistically significant, only staging and treatment were predictors of reduced overall survival. Conclusion: Tumor staging, and treatment were prognostic factors for the disease

Prevalence and predictors of breastfeeding in the MINA-Brazil cohort / Prevalência e preditores do aleitamento materno na coorte MINA-Brasil

ABSTRACT OBJECTIVE: To describe the prevalence and factors associated with exclusive (EBF) and continued breastfeeding (BF) practices among Amazonian children. METHODS: Data from 1,143 mother-child pairs recorded on the Maternal and Child Health and Nutrition in Acre (MINA-Brazil) birth cohort were used. Information on EBF and BF was collected after childbirth (July 2015-June 2016) and during the follow-up visits at 1 and 6 months postpartum, 1, 2, and 5 years of age. For longitudinal analysis, the outcomes were EBF and BF duration. Probability of breastfeeding practices were estimated by Kaplan-Meier survival analysis. Associations between baseline predictors variables and outcomes among children born at term were assessed by extended Cox regression models. RESULTS: EBF frequencies (95% confidence interval [95%CI]) at 3 and 6 months of age were 33% (95%CI: 30.2-36.0) and 10.8% (95%CI: 8.9-12.9), respectively. Adjusted hazard ratio for predictors of early EBF cessation were: being a first-time mother = 1.47 (95%CI: 1.19-1.80), feeding newborns with prelacteals = 1.70 (95%CI: 1.23-2.36), pacifier use in the first week of life = 1.79 (95%CI: 1.44-2.23) or diarrhea in the first two weeks of life = 1.70 (95%CI: 1.15-2.52). Continued BF frequency was 67.9% (95%CI: 64.9-70.8), 29.3% (95%CI: 26.4-32.4), and 1.7% (95%CI: 0.9-2.8) at 1, 2 and 5 years of age, respectively. Adjusted hazard ratio for predictors of early BF cessation were: male sex = 1.23 (95%CI: 1.01-1.49), pacifier use in the first week of life = 4.66 (95%CI: 2.99-7.26), and EBF less than 3 months = 2.76 (95%CI: 1.64-4.66). CONCLUSIONS: EBF and continued BF duration among Amazonian children is considerably shorter than recommendations from the World Health Organization. Significant predictors of breastfeeding practices should be considered for evaluating local strategies to achieve optimal breastfeeding practices.

RESUMO OBJETIVO: Descrever a prevalência e os fatores associados às práticas de aleitamento materno exclusivo (AME) e continuado (AM) entre crianças amazônicas. MÉTODOS: Foram utilizados dados de 1.143 pares mãe-filho registrados na coorte de nascimento Materno-Infantil no Acre (MINA-Brasil). As informações sobre AME e AM foram coletadas após o parto (julho de 2015-junho de 2016) e durante as consultas de acompanhamento com 1 e 6 meses pós-parto e com 1, 2 e 5 anos de idade. A análise longitudinal considerou a duração do AME e AM como desfechos. A probabilidade das práticas de aleitamento materno foi estimada pela análise de sobrevida de Kaplan-Meier. As associações entre as variáveis preditoras basais e os desfechos entre crianças nascidas a termo foram avaliadas por modelos de regressão de Cox estendidos. RESULTADOS: As frequências de AME (intervalo de confiança de 95% [IC95%]) aos 3 e 6 meses de idade foram de 33% (IC95%: 30,2-36,0) e 10,8% (IC95%: 8,9-12,9), respectivamente. A razão de risco ajustada para preditores de interrupção precoce do AME foi: ser primípara = 1,47 (IC95%: 1,19-1,80), alimentar recém-nascidos com pré-lácteos = 1,70 (IC95%: 1,23-2,36), usar chupeta na primeira semana de vida = 1,79 (IC95%: 1,44-2,23) e apresentar diarreia nas duas primeiras semanas de vida = 1,70 (IC95%: 1,15-2,52). A frequência do AM continuado foi de 67,9% (IC95%: 64,9-70,8), 29,3% (IC95%: 26,4-32,4) e 1,7% (IC95%: 0,9-2,8) aos 1, 2 e 5 anos de idade, respectivamente. A razão de risco ajustada para preditores de cessação precoce do AM foi: sexo masculino = 1,23 (IC95%: 1,01-1,49), uso de chupeta na primeira semana de vida = 4,66 (IC95%: 2,99-7,26) e AME menor que 3 meses = 2,76 (IC95%: 1,64-4,66). CONCLUSÕES: A duração do AME e do AM continuado entre crianças amazônicas é consideravelmente menor do que as recomendações da Organização Mundial da Saúde. Preditores significativos das práticas de aleitamento materno devem ser considerados na avaliação das estratégias locais para alcançar práticas ideais de aleitamento materno.