Patient presenting features
| Age at diagnosis, y | No. (%) |
| Younger than 1 | 15 (3.6) |
| 1 to 9 | 259 (62.9) |
| 10 or older | 138 (33.5) |
| Sex | |
| Male | 236 (57.3) |
| Female | 176 (42.7) |
| Race | |
| White | 311 (75.5) |
| Black | 68 (16.5) |
| Other | 33 (8.0) |
| WBC count, cells/mm3 | |
| Lower than 50 000 | 302 (73.3) |
| 50 000 or higher | 110 (26.7) |
| DNA index | |
| 1.16 or higher | 92 (22.3) |
| Other | 320 (77.7) |
| CNS status | |
| CNS-2, 3 or traumatic with blasts | 166 (40.3) |
| CNS-1, traumatic without blasts | 246 (59.7) |
| Lineage | |
| B | 346 (84.0) |
| T | 66 (16.0) |
| Philadelphia chromosome | |
| Absent | 397 (96.4) |
| Present | 13 (3.2) |
| Not known | 2 (0.5) |
| t(1;19) | |
| Absent | 386 (93.7) |
| Present | 18 (4.4) |
| Not known | 8 (1.9) |
| t(4;11) | |
| Absent | 393 (95.4) |
| Present | 11 (2.7) |
| Not known | 8 (1.9) |
| TEL/AML1 | |
| Absent | 335 (81.3) |
| Present | 60 (14.6) |
| Not known | 17 (4.1) |
| Received G-CSF | |
| Yes | 99 (24.0) |
| No | 313 (76.0) |
| Received irradiation | |
| Yes | 57 (13.8) |
| No | 355 (86.2) |
| Age at diagnosis, y | No. (%) |
| Younger than 1 | 15 (3.6) |
| 1 to 9 | 259 (62.9) |
| 10 or older | 138 (33.5) |
| Sex | |
| Male | 236 (57.3) |
| Female | 176 (42.7) |
| Race | |
| White | 311 (75.5) |
| Black | 68 (16.5) |
| Other | 33 (8.0) |
| WBC count, cells/mm3 | |
| Lower than 50 000 | 302 (73.3) |
| 50 000 or higher | 110 (26.7) |
| DNA index | |
| 1.16 or higher | 92 (22.3) |
| Other | 320 (77.7) |
| CNS status | |
| CNS-2, 3 or traumatic with blasts | 166 (40.3) |
| CNS-1, traumatic without blasts | 246 (59.7) |
| Lineage | |
| B | 346 (84.0) |
| T | 66 (16.0) |
| Philadelphia chromosome | |
| Absent | 397 (96.4) |
| Present | 13 (3.2) |
| Not known | 2 (0.5) |
| t(1;19) | |
| Absent | 386 (93.7) |
| Present | 18 (4.4) |
| Not known | 8 (1.9) |
| t(4;11) | |
| Absent | 393 (95.4) |
| Present | 11 (2.7) |
| Not known | 8 (1.9) |
| TEL/AML1 | |
| Absent | 335 (81.3) |
| Present | 60 (14.6) |
| Not known | 17 (4.1) |
| Received G-CSF | |
| Yes | 99 (24.0) |
| No | 313 (76.0) |
| Received irradiation | |
| Yes | 57 (13.8) |
| No | 355 (86.2) |