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Demographic characteristics [no. (%)] of ALL cases and controls.
| Cases | Cases (n = 790) | Population controls (n = 790) |
|---|---|---|
| Mother’s education | ||
| None or primary school | 34 (4.3) | 25 (3.2) |
| Secondary school | 437 (55.3) | 436 (55.2) |
| College or university | 319 (40.4) | 328 (41.6) |
| Mother’s age at child’s birth | ||
| < 35 | 721 (91.3) | 743 (94.0) |
| ≥35 | 69 (8.7) | 47 (6.0) |
| Family income at diagnosis (Can$) | ||
| ≥40,000 | 312 (39.9) | 309 (40.2) |
| 10,000–39,000 | 427 (54.7) | 422 (54.9) |
| < 10,000 | 42 (5.4) | 38 (4.9) |
