Body mass index, lifestyles, physical performance and cognitive decline: the "Treviso Longeva (TRELONG)" study.

Objectives The relative contributions of risk factors, as body mass index (BMI), depression, chronic diseases, smoking, and lifestyles (as physical and performance activity, social contacts and reading habit) to cognitive decline in the elderly are unclear. We explored these variables in relation to 7-year cognitive decline in long-lived Italian elderly.