Table 1 Maternal and infant characteristics for 512 children diagnosed with brain tumour and 542 children serving as controls
Childhood brain tumour | Controls | |||
|---|---|---|---|---|
N | % | N | % | |
Maternal age (years) | ||||
15–24 | 178 | 34.8 | 167 | 31.9 |
25–34 | 305 | 59.6 | 320 | 61.1 |
35–44 | 29 | 5.7 | 37 | 7.1 |
Birth order | ||||
1 | 245 | 47.9 | 210 | 40.1 |
>2 | 267 | 52.1 | 314 | 59.9 |
Multiple birth | ||||
No | 502 | 98.0 | 516 | 98.5 |
Yes | 10 | 2.0 | 8 | 1.5 |
Mother born in a Nordic country | ||||
Yes | 491 | 95.9 | 496 | 94.7 |
No | 21 | 4.1 | 28 | 5.3 |
Gestational age at birtha (weeks) | ||||
22–32 | 5 | 1.0 | 7 | 1.3 |
33–36 | 24 | 4.7 | 23 | 4.4 |
37–41 | 399 | 77.9 | 412 | 78.6 |
42–45 | 81 | 15.8 | 78 | 14.9 |
Missing | 3 | 0.6 | 4 | 0.8 |
Mode of delivery | ||||
Vaginal | 425 | 83.0 | 422 | 80.5 |
Vacuum extraction | 28 | 5.5 | 31 | 5.9 |
Caesarean section | 59 | 11.5 | 71 | 13.5 |
Breech position | ||||
No | 503 | 98.2 | 513 | 97.9 |
Yes | 9 | 1.8 | 11 | 2.1 |
Birth weight, SDS b | ||||
SGA | 9 | 1.8 | 12 | 2.3 |
AGA | 477 | 93.2 | 493 | 94.1 |
LGA | 19 | 3.7 | 14 | 2.7 |
Missing | 7 | 1.4 | 5 | 1.0 |
Head circumference, SDS b | ||||
SGA | 15 | 2.9 | 13 | 2.5 |
AGA | 473 | 92.4 | 487 | 92.9 |
LGA | 19 | 3.7 | 13 | 2.5 |
Missing | 5 | 1.0 | 11 | 2.1 |
Level of hospital | ||||
Primary level hospital | 161 | 31.4 | 150 | 28.6 |
Secondary level hospital | 248 | 48.4 | 234 | 44.7 |
Tertiary level hospital | 103 | 20.1 | 140 | 26.7 |
Total | 512 | 100.0 | 524 | 100.0 |
