Prevalence and factors associated with multimorbidities in Brazilian older adults.

This study aimed to identify the prevalence of multimorbidity in Brazilian older adults and factors associated with socioeconomic and lifestyle variables. This is a cross-sectional, population-based study carried out with data from the National Health Survey database. Seniors with multimorbidity where the ones with a diagnosis of two or more chronic diseases. The chi-square test was used in data analysis, and then prevalence ratios were estimated through Poisson multiple regression, both with 95% confidence level. In total, 11,697 older adults were evaluated and the multimorbidity prevalence was 53.1%. As a result of the multivariate analysis, female seniors (p < 0.001), the oldest elderly (p = 0.002), those who were not single, more strongly associated with widowers (p = 0.001) and those with a health plan at the interview (p < 0.001) were associated with multimorbidity. Also, in comparison with older adults with two chronic diseases, women are associated with three (p = 0.003) and four or more chronic diseases (p < 0.001). We can conclude that multimorbidity in Brazilian older adults is a widespread condition and that it has been influenced by socioeconomic factors and is poorly related to lifestyle.