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Subgroup analysis for time to sustained recovery up to day 90 for the full cohort
Continuous variables interaction p values are based on them being fitted as continuous rather than categorical. For baseline pulmonary category, participants were eligible for enrolment in the HFNC or NIV group, only after July 19, 2021; this corresponds to a pandemic phase when the delta variant was predominant. HFNC=high-flow nasal cannula. NIV=non-invasive ventilation. RRR=recovery rate ratio.
