Prevalence Study : Elderly Patients and Rehabilitation in ICU. Impact of Frailty.

We assessed the 5 components of Fried's frailty index, resulting from cumulative decline across multiple physiological systems and contain five criteria (shrinking, weakness, slowness, low-level physical activity, and self-reported exhaustion). All five components were considered from the previously reported definition and adapted to the ICU environment. The patients were considered to be frail if they had three or more frailty components among the five criteria.

During the patients' hospitalization in ICU, the following data were collected last day in ICU:

the need for dialysis during ICU the duration of mechanical ventilation (number of days under mechanical ventilation) the duration of shock (number of days under catecholamines)

Nutritional intake during ICU stay, from the first day to the patient's exit, including route of administration (enteral, parenteral), last day in ICU we assessed:

number of days under enteral nutrition number of days under enteral parenteral nutrition calculation of the average calorie / day

Last day in ICU, we record the highest level of mobilization achieved during the ICU period, the following ordinal scale was used: 1) no mobilization, 2) turning in bed, 3) sitting in bed with the head of bed elevated, 4) sitting on the edge of the bed with feet on floor, 5) sitting out of bed in a chair, 6) standing out of bed, 7) marching in place, 8) walking, 9) using cycloergometer and 9) using electrical muscle stimulation.

ICU mortality and Hospital mortality Decision of therapeutics limitation. Length of stay (ICU and hospital stay).