Table 1 Demographic information about the sample of children affected by a ND-GC and sibling controls
Variable | Â | Group | |
|---|---|---|---|
|  | Overall, N = 493a | ND-GC, N = 389a | Sibling, N = 104a |
Age | 9.26 (7.27, 12.21) | 9.01 (7.16, 11.82) | 10.23 (8.12, 13.00) |
Gender | |||
 Female | 182 (37%) | 133 (34%) | 49 (47%) |
 Male | 311 (63%) | 256 (66%) | 55 (53%) |
Highest educational level | |||
 No school leaving exams | 32 (6.5%) | 29 (7.5%) | 3 (2.9%) |
 Low | 104 (21%) | 86 (22%) | 18 (17%) |
 Middle | 175 (35%) | 140 (36%) | 35 (34%) |
 High | 129 (26%) | 105 (27%) | 24 (23%) |
 Unknown | 53 (11%) | 29 (7.5%) | 24 (23%) |
Income | |||
 ≤ £19,999 | 123 (25%) | 105 (27%) | 18 (17%) |
 £20,000–£39,999 | 166 (34%) | 134 (34%) | 32 (31%) |
 £40,000–£59,999 | 74 (15%) | 62 (16%) | 12 (12%) |
 £60,000+ | 71 (14%) | 52 (13%) | 19 (18%) |
 Unknown | 59 (12%) | 36 (9.3%) | 23 (22%) |
Ethnicity | |||
 European | 439 (89%) | 356 (92%) | 83 (80%) |
 Other | 31 (6.3%) | 26 (6.7%) | 5 (4.8%) |
 Unknown | 23 (4.7%) | 7 (1.8%) | 16 (15%) |