The influence of physical and mental health on life satisfaction is mediated by self-rated health: A study with Brazilian elderly.

Chronic diseases, signals and symptoms of health problems and objective losses in functionality are seen as strongly related to low levels of life satisfaction in old age. Among seniors, self-rated health is associated with both quality of health and life satisfaction, but its relationships with objective health measures are controversial. This study aimed at identifying the influence of self-rated health as a mediator of the relationships between objectives indicators of physical and mental health and the elderly's life satisfaction. Self-reporting and physical performance measures were derived from the data basis of the FIBRA Study, which investigated frailty and associated variables in a cross-sectional sample of 2164 subjects aged 65 and above, randomly selected in seven Brazilian cities. A model considering satisfaction as a dependent variable, the number of diseases, frailty, cognitive status and depressive symptoms as predictors and self-rated health as a mediating variable was tested through path analysis. The model fit the data well and explained 19% of life satisfaction's variance. According to the bootstrapping method, indirect effects were significant for all trajectories, suggesting that self-rated health is a mediator variable between physical and mental health and elderlýs life satisfaction. In conclusion, adverse conditions of physical and mental health can influence the elderlýs life satisfaction, mostly when they determine a decrease in their levels of self-rated health.