Five year actuarial percentage survival rates (SE) by calandar period of diagnosis, with results of χ2 test for trend in survival with calendar period
| 1980–84 | 1985–89 | 1990–94 | p Value | |
|---|---|---|---|---|
| Age at diagnosis (years) | ||||
| 0 | 29 (6.6) | 32 (6.1) | 50 (6.5) | 0.12 |
| 1–4 | 75 (1.6) | 82 (1.3) | 86 (1.2) | < 0.0001 |
| 5–9 | 68 (2.2) | 74 (2.1) | 80 (1.8) | < 0.0001 |
| 10–14 | 54 (2.8) | 58 (3.1) | 74 (2.8) | < 0.0001 |
| Sex | ||||
| Male | 65 (1.6) | 71 (1.5) | 80 (1.3) | < 0.0001 |
| Female | 70 (1.7) | 77 (1.6) | 83 (1.4) | < 0.0001 |
| White blood cell count (× 109/l) | ||||
| 0–49 | 74 (1.3) | 79 (1.2) | 86 (1.0) | < 0.0001 |
| 50+ | 44 (2.7) | 56 (2.6) | 68 (2.3) | < 0.0001 |
| Immunophenotype | ||||
| Common (incl. pre-B) | 74 (1.4) | 80 (1.1) | 86 (1.0) | < 0.0001 |
| T cell | 41 (3.5) | 50 (3.9) | 62 (3.4) | < 0.0001 |
| B cell (mature) | 33 (10.3) | 45 (11.1) | 68 (8.4) | 0.0054 |
| Null | 48 (5.5) | 56 (5.4) | 65 (5.5) | 0.022 |
| Down’s syndrome | ||||
| Yes | 42 (10.1) | 46 (10.6) | 78 (7.3) | 0.022 |
| No | 68 (1.2) | 74 (1.1) | 81 (1.0) | < 0.0001 |