Geographic, demographic, and socioeconomic differences in quality of data on cause of death in Brazilian elders

This study identifies geographic, demographic, and socioeconomic differences in the quality of data on underlying causes of death in the Brazilian elderly population. We used three quality indicators: the proportion of ill-defined causes, the proportion of unspecified causes, and the two proportions combined. We analyzed the main ill-defined and unspecified causes and the association between these indicators and individual characteristics on death certificates (DC) and characteristics of the municipalities. Unspecified causes exceed ill-defined causes, and both increase with age. Schooling, race, size of municipality, and per capita GDP were associated with quality of data (especially with ill-defined as compared to unspecified causes). Having received medical care decreased the odds of cause of death being recorded as ill-defined and increased the odds of unspecified records. Programs to improve quality of information on death certificates should focus on ill-defined and unspecified causes in the elderly.