Time to GVHD-treatment failure through study day 80 with hazard ratios and confidence intervals. Panel A shows product-limit estimates on an intent-to-treat basis; panel B shows estimates with a guarantee period for the first 10 days of treatment. Estimates are based on the Kaplan-Meier method. The hazard ratios at study day 50 were (A) 0.63 (95% CI, 0.35-1.13; P = .12) and (B) 0.39 (95% CI, 0.19-0.81; P = .009), respectively.