Denominadores para o cálculo de coberturas vacinais: um estudo das bases de dados para estimar a população de menores de um ano de idade. / Denominators of calculation of the vaccination coverage: a study of the databases for the estimation of populations of children under one year old.
AUTOR(ES)
Antonia Maria da Silva Teixeira
DATA DE PUBLICAÇÃO
2008
RESUMO
Variations in vaccine coverage (VC) in children less than one year of age is attributed to limitations in doses registry and in choosing adequate denominator. Sinasc coverage to live births (LV) and population estimators may lead to VC variability in certain areas. Criteria to guide denominators choice are necessary to PNI. An ecologic-spatial study was carried out to evaluate and compare population estimates (IBGE/Datasus), number of LV by RCoortes method and Sinasc in 2005 to calculate VC by states and municipalities in Brazil. Numerator was number of 3rd doses of DTP+Hib in <1 year old. Atypical and high VC figures were observed in municipalities of small population, suggesting Sinasc underregistration. For those, population estimates seemed less precise. Pearson correlation coefficients (R2) between number of live births and population estimates for municipalities with <100 LV/yr e com 100-999 LV were, respectively, 59.8% e 87.8%; in municipalities with 1000+ LV R2 was >95%. It is suggested that the number of LV become the adequate denominator to calculate VC, considering increase in Sinasc coverage. RCoortes estimators are close to population estimates, especially for States and may be an alternative denominator. Caution with small population municipalities is recommended, monitoring vaccination and Sinasc coverage. Incorporating critics in SIAPI to identify anomalous situations may promote better data quality and more reliable vaccination coverage assessment.
ASSUNTO(S)
nascidos vivos rcoortes indicadores indicators vaccination coverage population siapi sinasc coberturas vacinais estimativas populacionais sinasc saude coletiva siapi rcoortes live birth
