Plano amostral para avaliação da cobertura vacinal

Abstract

A sampling project applied in a survey for estimating the vaccination coverage in Araraquara County, S. Paulo State (Brazil), in 1983, is described. A target population of children aged 12-13 months was divided into the strata: children living in private dwellings (i.e. single-family houses) and those living in collective dwelling places (orphanage, asylum). R.H. Henderson and T. Sundaresan's method, proposed by the World Health Organization (WHO) for use by the Expanded Programme on Immunization (EPI) was applied to the first stratum. This method consists of the random selection of 30 partial areas with a degree of probability proportional to the respective partial populations in each area chosen; a starting point ("household") is selected at random within each selected area; the selection of 7 children within each area begins with the first household and continues according to fixed rules. The sample of the first stratum was taken from areas in both urban and rural zones. In the urban zone, after the selection of the area and before the selection of the starting point, an intermediate stage, which consist in the selection of a block with probability proportional to its estimated population, was introduced. A sample was selected form the second stratum with the same sampling fraction used in the first stratum. The ratio-estimate is proposed as the estimator of the vaccination coverage rate and the formula for the calculation of the standard error is presented.

Sampling plan in health surveys, city of São Paulo, Brazil, 2015

“…Those below 1.5 were considered suitable, which was adopted in the planning of the sample. We also verified the frequency of estimates below 2.0, which is frequently adopted in sampling plans 3 , 4 , 6 , 14 .…”

Avaliação da cobertura vacinal e do uso de serviços de saúde para vacinação na Região Sudoeste da Grande São Paulo, 1989-1990

“…1984;NAKAO, 1987). Esses inquéritos têm demostrando que a metodologia é simples e prática, podendo ser utilizada pelo pessoal da saúde, como referido por SILVA (1989), liO método de amostragem por conglomerados, adotado pelo PAI, veio de encontro das necessidades sentidas na execução de levantamentos visando a avaliação de um programa de vacinação. O principal mérito desta metodologia é sua exeqüibilidade por profissionais não especializados ... ", refere ainda que, li... o método proposto é pouco oneroso, estando ao alcance de qualquer serviço de saúde organizado, isto é, passível de ser aplicado em países em desenvolvimento.…”