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. Author manuscript; available in PMC: 2015 Aug 3.
Published in final edited form as: JAMA. 2015 Feb 3;313(5):471–482. doi: 10.1001/jama.2015.12

Figure 2. Kaplan-Meier Failure Curves for Mortality at 24 Hours and 30 Days.

Figure 2

The colored areas indicate 95% confidence bands, which were calculated using the Hall-Wellner method. The Hall-Wellner bands extend to the last event (death) in each group. For 24-hour mortality, the Cox proportional hazards regression model, adjusted for site as a random effect, produced a hazard ratio (HR) of 0.72 (95% CI, 0.49–1.07). There were no patients lost to follow-up during the first 24 hours from randomization. For 30-day mortality, the Cox proportional hazards regression model, adjusted for site as a random effect, produced an HR of 0.83 (95% CI, 0.61–1.12). Between 24 hours and 30 days, 4 patients were lost to follow-up and were censored when they withdrew consent or were last known to be alive (3 in the 1:1:1 group and 1 in the 1:1:2 group).