Psychological Impact of Medical Evacuations on Families of Patients Admitted to Intensive Care Unit for Severe COVID-19

The case group is trusted person of evacuated patient. The control group is trusted person of not evacuated patient. The trusted person of the group control will be matched to trusted patient of the case group on : their relationship with the patient (spouse/ascendant/descendant/other) and on criteria specific to the patient: sex, age range ( \<75 years or ≥ 75 years), invasive ventilation and becoming at 3 months post COVID-19 (survivor / non survivor)