Long Term Effects of Awake Prone Positioning in COVID-19 ICU Patients

Inclusion Criteria: * Patients included in the randomized meta-trial evaluating awake prone position versus control among COVID-19 patients on high-flow nasal oxygen therapy (Ehrmann 2021). * Patients alive at D28 * No opposition to participate in the research which evaluates mortality and quality of life by telephone interview. Exclusion Criteria: * Patients lost to follow-up after 28 days. * Withdrawal of consent from randomized meta-trial by patient * Vulnerable person: safeguard of justice, curatorship, or guardianship * Patients refusing to answer telephone questionnaire.