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Mortality by sex and pre-specified subgroups. Twenty-eight-day mortality by sex and (A) age group, (B) race/ethnicity, (C) comorbities, (D) body mass index, (E) PaO2:FIO2, and (F) vasopressor use. CAD = coronary artery disease, CHF = congestive heart failure, CKD = chronic kidney disease, DM = diabetes, HTN = hypertension, PaO2:FIO2 = ratio of PaO2 over the fraction of inspired oxygen (assessed only in patients receiving invasive mechanical ventilation).
