Table 4

Clinical outcomes according to age at diagnosis of HCL

≤40 y of age (n = 88)All patients (n = 209)
Median age (range) 36 y (20-40) 50 y (28-79) 
Response rate 100% 100% 
Complete 88% 95% 
Partial 12% 5% 
Median response duration (mo) 57 (range, 7-246 mo) 98 (range, 8-172 mo) 
Relapse rate 58% 37% 
Median time to relapse (mo) 54 (range, 7-246 mo) 42 (range, 8-118 mo) 
Observed-to-expected ratio of developing a second malignancy 1.60 (95% CI, 0.80-2.89) 2.03 (95% CI, 1.49-2.71) 
≤40 y of age (n = 88)All patients (n = 209)
Median age (range) 36 y (20-40) 50 y (28-79) 
Response rate 100% 100% 
Complete 88% 95% 
Partial 12% 5% 
Median response duration (mo) 57 (range, 7-246 mo) 98 (range, 8-172 mo) 
Relapse rate 58% 37% 
Median time to relapse (mo) 54 (range, 7-246 mo) 42 (range, 8-118 mo) 
Observed-to-expected ratio of developing a second malignancy 1.60 (95% CI, 0.80-2.89) 2.03 (95% CI, 1.49-2.71) 

CI, confidence interval.

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