Completitude e confiabilidade do Sistema de Informações sobre Mortalidade para óbitos perinatais no Brasil, 2011-2012: um estudo descritivo*

Abstract

Abstract Objective: to analyze the completeness and reliability of data on perinatal deaths held on Brazil’s Mortality Information System (SIM) in 2011-2012. Methods: this was a study evaluating the quality of completeness of data on perinatal deaths reported on SIM compared to data from the ‘Birth in Brazil’ survey for the same period; to evaluate reliability, we used the Kappa coefficient, the intraclass correlation coefficient (ICC) and the Bland-Altman plot method. Results: completeness was greater than 80%, and agreement was 0.61 for 10 of the 12 evaluated fields; aggregated gestation length (Kappa coefficient=0.542) and continuous gestation length (ICC=0.448) for early neonatal deaths and fetal deaths, respectively, had regular agreement; graphical evaluation of gestation length showed that the fetal death metric was underestimated and that early neonatal deaths were overestimated by between 25 and 35 weeks of gestation. Conclusion: the information analyzed available on SIM for perinatal deaths is complete and reliable for the period analyzed.