Denominators of calculation of the vaccination coverage: a study of the databases for the estimation of populations of children under one year old

by da Silva, Antonia Maria

Abstract (Summary)
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 livebirths (LV) and population estimators may lead to VC variability in certain areas. Criteria to guide denominator?s choice are necessary to PNI. An ecologic-spatial study was carried out toevaluate 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. Numeratorwas number of 3rd doses of DTP+Hib in lt;1 year old. Atypical and high VC figures were observed in municipalities of small population, suggesting Sinasc underregistration. Forthose, population estimates seemed less precise. Pearson correlation coefficients (R2) between number of live births and population estimates for municipalities with lt;100 LV/yr e com 100-999 LV were, respectively, 59.8% e 87.8%; in municipalities with 1000+ LV R2 was gt;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 dataquality and more reliable vaccination coverage assessment
This document abstract is also available in Portuguese.
Bibliographical Information:

Advisor:Eduardo Luiz Andrade Mota; Expedito José de Albuquerque Luna; Jose Cassio de Moraes

School:Universidade Federal da Bahia

School Location:Brazil

Source Type:Master's Thesis

Keywords:RCoortes vaccination coverage indicators population live birth


Date of Publication:01/22/2008

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