First CR duration. For this analysis, Kaplan-Meier curves were plotted from time 0, the time when patients achieved a first CR. Relapses were not considered as separate events in this analysis (n = 31 CR events). (A) CR duration of the entire cohort (n = 31). (B) In the comparison of 2 subgroups (patients with high [>2] and low [≤2] comorbidity index), there were 8 and 23 remission events, respectively (P = .002). Median observation time after first CR was a median of 630 (range, 17-3178; IQR, 280.5-1577.0) days. For the 3 relapses, subsequent CR durations ranged from 161 to 1385 days (median, 1372 days).