Fried frailty scale
This scale works as a scoring system that assigns one point for the presence of each of the following 5 phenotypical manifestations that are commonly found in frail individuals: shrinking (self-report of unintentional weight loss of >4.5 kg in the past year), self-reported exhaustion, weakness (measured with grip strength and standardized by sex and body mass index), slow walking speed (measured as time to walk 4.6 m. at usual pace and standardized by sex and height), and low physical activity (using as cut-off value the consumption of <383 Kcal per week for men and <270 Kcal per week for women). According to the total score obtained, the individuals are classified as robust (0 points), pre-frail (1-2 points) and frail (3-5 points).