Figure 2. Kaplan–Meier Estimates of the Proportion of Donors Continuing to Receive Vasopressors.

Shown are survival curves in the intention-to-treat population for the time from initiation of levothyroxine or saline infusion until weaning from vasopressors and inotropes (excluding vasopressin at a dose of <1 unit per hour) in the two trial groups. The shaded bands represent 95% confidence intervals. The proportional-hazards assumption was satisfied.