Time to negative inhibitor of propensity score-matched groups and time to complete remission of propensity score-matched groups. Survival plots of propensity score-matched groups comparing steroids alone with steroids and oral cyclophosphamide (n = 70 in each group) showing: (A) time to negative inhibitor (HR = 2.11; 95% CI, 1.38-3.21; P < .001); and (B) time to complete remission (HR = 2.36; 95% CI, 1.49-3.74; P < .001).