RESUMEN
OBJECTIVE: To estimate the prevalence and describe the distribution of trachoma among schoolchildren in Brazilian municipalities. METHODS: Cross-sectional study, using cluster sampling, of the schoolchildren population of the Brazilian municipalities with Human Development Index - Municipal lower than the national average. This trachoma prevalence survey was conducted by the Ministry of Health, in the period 2002-2007. There were 119,531 schoolchildren selected from 2,270 schools located in 1,156 municipalities. The selected schoolchildren underwent an external ocular examination, with a magnifying glass (2.5X), to detect clinical signs of trachoma according to the WHO criteria. The prevalence of trachoma, by state and national level, and their respective 95% confidence intervals were estimated. Chi-square and Chi-square for trends tests were used to compare categorical variables. RESULTS: There were 6,030 cases of trachoma detected, resulting in a prevalence of 5.0% (95%CI 4.5;5.4). There was no significant difference between the sexes. The prevalence of trachoma was 8.2% among children under 5 years of age, decreasing among higher age groups (p < 0.01). There was a significant difference in prevalence between urban and rural areas, 4.3% versus 6.2% respectively (p < 0.01). Cases were detected in 901 municipalities (77.7% of the sample), in all regions of the country. In 36.8% of the selected municipalities, the prevalence was higher than 5%. CONCLUSIONS: The study shows that trachoma is a significant public health problem in Brazil, contradicting the belief that the disease had been controlled in the country. The survey provides a baseline for evaluating planned interventions aimed at achieving the goal of global certification of elimination of trachoma as a cause of blindness in Brazil by 2020.
Asunto(s)
Monitoreo Epidemiológico , Enfermedades Desatendidas/epidemiología , Tracoma/epidemiología , Adolescente , Distribución por Edad , Factores de Edad , Brasil/epidemiología , Distribución de Chi-Cuadrado , Niño , Preescolar , Estudios Transversales , Femenino , Humanos , Lactante , Masculino , Tamizaje Masivo/estadística & datos numéricos , Prevalencia , Sector Público/estadística & datos numéricos , Características de la Residencia , Población Rural/estadística & datos numéricos , Instituciones Académicas/estadística & datos numéricos , Factores Sexuales , Tracoma/complicaciones , Tracoma/diagnóstico , Población Urbana/estadística & datos numéricosRESUMEN
OBJETIVO: Estimar a prevalência e descrever a distribuição do tracoma entre escolares em municípios brasileiros. MÉTODOS: Estudo de corte transversal, usando amostragem por conglomerados, da população escolar dos municípios brasileiros com Índice de Desenvolvimento Humano-Municipal menor que a média nacional. O inquérito de prevalência de tracoma foi realizado pelo Ministério da Saúde entre 2002 e 2007. Foram selecionados 119.531 alunos de 2.270 escolas localizadas em 1.156 municípios. Os alunos foram submetidos ao exame ocular externo, com lupa (2,5X), para detecção de sinais clínicos de tracoma segundo critérios da OMS. Estimou-se a prevalência de tracoma segundo estado e em nível nacional, e seus respectivos intervalos de 95% de confiança. Para a comparação de variáveis categóricas foram usados os testes do Qui-quadrado e do Qui-quadrado de tendência linear. RESULTADOS: Foram detectados 6.030 casos de tracoma, resultando em prevalência de 5,0% (IC95% 4,5;5,4). Não foi encontrada diferença significante entre os sexos. A prevalência de tracoma foi de 8,2% entre menores de cinco anos de idade, diminuindo nas faixas etárias mais altas (p < 0,01). Houve diferença significante entre as prevalências de tracoma na zona urbana e rural, 4,3% versus 6,2%, respectivamente (p < 0,01). Foram detectados casos em 901 municípios (77,7% da amostra), em todas as regiões do País. Em 36,8% dos municípios selecionados a prevalência foi superior a 5%. CONCLUSÕES: O estudo mostra que o tracoma é um importante problema de saúde pública no Brasil, contradizendo a crença de que a endemia estaria controlada no País. O inquérito realizado apresenta uma linha de base para avaliação das intervenções ...
OBJETIVO: Estimar la prevalencia y describir la distribución de tracoma entre escolares en municipios brasileños MÉTODOS: Estudio de corte transversal, usando muestreo por conglomerados, de la población escolar de los municipios brasileños con Índice de Desarrollo Humano-Municipal menor que el promedio nacional. La pesquisa de prevalencia de tracoma fue realizada por el Ministerio de la Salud entre 2002 y 2007. Se seleccionaron 119.531 alumnos de 2.270 escuelas localizadas en 1.156 municipios. Los alumnos fueron sometidos a examen ocular externo, con lupa (2,5X), para detección de señales clínicas de tracoma según criterios de la OMS. Se estimó la prevalencia de tracoma según estado y a nivel nacional, y sus respectivos intervalos de 95% de confianza. Para la comparación de variables categóricas se usaron las pruebas de Chi-cuadrado y de Chi-cuadrado de tendencia linear. RESULTADOS: Se detectaron 6.030 casos de tracoma, resultando en prevalencia de 5,0% (IC95% 4,5;5,4). No se encontró diferencia significativa entre los sexos. La prevalencia de tracoma fue de 8,2% entre menores de cinco años de edad, disminuyendo en los grupos etarios más altos (p0,01). Hubo diferencia significativa entre las prevalencias de tracoma en la zona urbana y rural, 4,3% vs. 6,2%, respectivamente (p0,01). Se detectaron casos en 901 municipios (77,7% de la muestra), en todas las regiones del País. En 36,8% de los municipios seleccionados la prevalencia fue superior a 5%. CONCLUSIONES: El estudio muestra que el tracoma es un importante problema de salud pública en Brasil, contradiciendo la creencia de que la endemia estaría controlada en el País. La pesquisa realizada presenta una línea de base para evaluación de las intervenciones planeadas con miras a alcanzar la meta mundial de certificación de eliminación del tracoma como ...
OBJECTIVE: To estimate the prevalence and describe the distribution of trachoma among schoolchildren in Brazilian municipalities. METHODS: Cross-sectional study, using cluster sampling, of the schoolchildren population of the Brazilian municipalities with Human Development Index - Municipal lower than the national average. This trachoma prevalence survey was conducted by the Ministry of Health, in the period 2002-2007. There were 119,531 schoolchildren selected from 2,270 schools located in 1,156 municipalities. The selected schoolchildren underwent an external ocular examination, with a magnifying glass (2.5X), to detect clinical signs of trachoma according to the WHO criteria. The prevalence of trachoma, by state and national level, and their respective 95% confidence intervals were estimated. Chi-square and Chi-square for trends tests were used to compare categorical variables. RESULTS: There were 6,030 cases of trachoma detected, resulting in a prevalence of 5.0% (95%CI 4.5;5.4). There was no significant difference between the sexes. The prevalence of trachoma was 8.2% among children under 5 years of age, decreasing among higher age groups (p < 0.01). There was a significant difference in prevalence between urban and rural areas, 4.3% versus 6.2% respectively (p < 0.01). Cases were detected in 901 municipalities (77.7% of the sample), in all regions of the country. In 36.8% of the selected municipalities, the prevalence was higher than 5%. CONCLUSIONS: The study shows that trachoma is a significant public health problem in Brazil, contradicting the belief that the disease had been controlled in the country. The survey provides a baseline for evaluating planned interventions aimed at achieving the goal of global certification of elimination of trachoma as a cause of blindness in Brazil by 2020. .