Fig. 2From: Clinical features and outcomes of prolonged mechanical ventilation: a single-center retrospective observational studyKaplan–Meier curves for survival, ICU/HCU stay, and continuation of mechanical ventilation (MV) in the patients mechanically ventilated for > 21 days (N = 93). The survival curve had a gentle slope from 21 to 90 days after initiation of MV. The curves of MV withdrawal and ICU/HCU discharge were almost identical, having an initial steep slope and transition to a gentle slope in the last third of the curvesBack to article page