[Study protocol concerning the determining factors of physical and psychosocial destabilisation in the elderly].

Objective: The main objective of this study is to define the factors associated with frailty and psychosocial imbalance in elderly people who live in the community.

Methods: Multicentre prospective study with a representative sample of subjects older than 75 years who live in the community in the province of Huesca (Spain). 5-year follow-up with biannual assessment.