Frailty, disability and survival in the elderly over the age of seventy: Evidence from "The Treviso Longeva (TRELONG) Study".

Frailty is a biological syndrome of decreased reserves and lower resistance to stressors, deriving from cumulative declines across multiple physiological systems and causing adverse outcomes. Physical frailty is easy to assess, strongly correlated to disability and to survival, considering the comorbidities, too. This working definition of frailty is inexpensive to apply, and provides a basis for standardized screening for risk of disability in older adults.