Analysis of quality of information about deaths from neoplasms in Brazil between 2009 and 2019.

Objective: To assess the quality of information about mortality from neoplasm within the Mortality Information System.

Methods: Descriptive observational study evaluating the quality of the Mortality Information System, with an outcome referring to data on deaths from neoplasm between 2009 and 2019 in the Brazilian population (≥15 years). Information Quality (IQ) was measured through coverage, specificity and completeness of data, at national and state level.

Results: The quality of the coverage dimension ranged from "good" to "excellent" in the national and state coverages. Specificity was classified as inadequate mainly in the states of the North and Northeast regions. The proportion of ill-defined causes was classified as "poor" quality in most units of analysis throughout the series. Data completeness varied according to indicator. Gender and age indicators were proven "excellent" for the entire period and units of analysis, while educational level varied in quality across units and periods, marital status had its quality improved over the period, as well as ethnicity/skin color.

Conclusions: The quality of data on mortality from neoplasm in the Brazilian population (≥15 years) is mostly adequate, but there are important gaps to be filled, as the expansion of IQ seeks to give visibility to the health condition of the Brazilian population and to propose public actions for its improvement.