Elderly patients are increasingly admitted in the Intensive Care Unit. Short-term outcome (e.g. hospital survival) of an ICU stay is improving in this population but little data have been published on long-term outcome. Beyond survival, outcome assessment in the elderly requires to evaluate several aspects of health: mental status, activity of daily living, pain, depression, frailty… referred by geriatrician as "comprehensive geriatric assessment' (CGA).

The purpose of the SENIOREA study is to evaluate one year outcome of elderly patients mechanically ventilated in the ICU by performing CGA one year after ICU admission. CGA will be performed on the patients' site of living.

This prospective multicentric trial will be conducted over 8 medico-surgical ICUs.

Inclusion Criteria:

1. Patients aged 75 or over
2. Admitted in a participating ICU
3. Requiring mechanical ventilation (invasive or non invasive), initiated before ICU admission or during the 48 first hours after admission.

Exclusion Criteria:

1. Non French-speaking person
2. Failure to obtain a consent by persons authorized to do so.
3. Person non-beneficiary of a social security system.

All patients aged 75 and over admitted in one of the participating ICU and requiring mechanical ventilation will be recruited for this study