Table 1. Characteristics of Australian childhood brain tumour case–control study (Aus-CBT) participants.
| Cases (n=306) | Controls (n=950) | |
|---|---|---|
|
Sex | ||
| Boy | 183 (59.8%) | 500 (52.6%) |
| Girl |
123 (40.2%) |
450 (47.4%) |
| Age at case diagnosis or control recruitment (mean years) |
7.0 |
6.2 |
| Year of birth (median) |
2001 |
2001 |
|
Case histology | ||
| Low-grade glioma | 146 (47.7%) | — |
| High-grade glioma | 27 (8.8%) | — |
| Embryonal tumour | 72 (23.5%) | — |
| Germ cell tumour | 20 (6.5%) | — |
| Ependymoma | 22 (7.2%) | — |
| Other/unclassified |
19 (6.2%) |
— |
|
Control type | ||
| Aus-CBT | — | 532 |
| Aus-ALL |
— |
418 |
|
State of residence | ||
| NSW/ACT | 103 (33.7%) | 286 (30.1%) |
| VIC/TAS | 86 (28.1%) | 251 (26.4%) |
| SA/NT | 19 (6.2%) | 78 (8.2%) |
| WA | 42 (13.7%) | 114 (12.0%) |
| QLD |
56 (18.3%) |
221 (23.3%) |
|
Parents included in the study | ||
| Mothers | 293 | 935 |
| Fathers |
242 |
795 |
|
Best parental education | ||
| Did not complete secondary school | 43 (14.1%) | 92 (9.7%) |
| Completed secondary school and/or trade qualification | 101 (33.0%) | 303 (31.9%) |
| University/college | 162 (52.9%) | 555 (58.4%) |
Abbreviations: ACT=Australian Capital Territory; Aus-ALL=Australian childhood acute lymphoblastic leukaemia; Aus-CBT=Australian, nation-wide case–control study of CBT; NSW=New South Wales; NT=Northern Territory; SA=South Australia; TAS=Tasmania; VIC=Victoria; WA=Western Australia.