Clinical and laboratory features, which showed significant different frequencies between the very young (< 40 years old) and the young (40 to < 50 years old) patients
| Factor . | Age category . | P . | |
|---|---|---|---|
| Younger than 40 y . | 40 to younger than 50 y . | ||
| Male | 208/312 (67) | 815/1377 (59) | .015 |
| Performance status 2+ | 87/296 (29) | 475/1286 (37) | .014 |
| ISS stage II | 63/219 (29) | 375/1048 (36) | .047 |
| Durie-Salmon subtype A | 252/310 (81) | 1170/1366 (86) | .053 |
| Platelets less than 130 × 109/L | 36/247 (15) | 116/1173 (10) | .030 |
| Factor . | Age category . | P . | |
|---|---|---|---|
| Younger than 40 y . | 40 to younger than 50 y . | ||
| Male | 208/312 (67) | 815/1377 (59) | .015 |
| Performance status 2+ | 87/296 (29) | 475/1286 (37) | .014 |
| ISS stage II | 63/219 (29) | 375/1048 (36) | .047 |
| Durie-Salmon subtype A | 252/310 (81) | 1170/1366 (86) | .053 |
| Platelets less than 130 × 109/L | 36/247 (15) | 116/1173 (10) | .030 |
Data are number with factor/number with valid data for factor (%)