Fig. 2. Kaplan–Meier curves for time-to-event outcomes. (A ) Primary outcome: time to discharge. (B ) Primary outcome: time to discharge (truncated at day 10). (C ) Length of intensive care unit stay (truncated at day 5). (D ) Time to extubation (truncated at 1,000 min). GA = general anesthesia only; GAE = general anesthesia plus epidural.