Age at testing and sociodemographic characteristics of the study children
| Comparison group (n = 49) | Cases without motor disability (n = 50) | Cases with motor disability (n = 15) | p Value | |
|---|---|---|---|---|
| Categorical comparisons are between cases without motor disability and comparator children; no comparison children were selected for those with motor disability. Values are mean (SD), median (interquartile range), number (%). | ||||
| Child’s age at testing (months) | 85.88 (5.03) | 88.10 (6.50) | 85.53 (3.89) | |
| Non-manual occupation of father | 34 (76%) | 37 (80%) | 9 (60%) | 0.83 |
| Maternal education >16 years | 14 (33%) | 14 (32%) | 3 (23%) | 1.00 |
| Paternal education >16 years | 11 (31%) | 14 (39%) | 2 (18%) | 0.62 |
| Family receives state income benefits | 16 (46%) | 16 (38%) | 15 (100%) | 0.64 |
| First born | 25 (54%) | 34 (72%) | 10 (67%) | 0.12 |
| Only child | 7 (15%) | 8 (17%) | 4 (27%) | 1.00 |
| Child white | 46 (94%) | 46 (92%) | 14 (93%) | 1.00 |
| Child’s first language English | 49 (100%) | 48 (96%) | 15 (100%) | 0.50 |
| Male sex | 28 (57%) | 31 (62%) | 9 (60%) | 0.61 |
| Maternal age at delivery | 28 (25–32) | 27 (23–31) | 25 (22–32) | 0.15 |
| Perceived stress scale (mother) | ||||
| Normal | 38 (84%) | 34 (77%) | 9 (64%) | 0.43 |
| High | 7 (16%) | 10 (23%) | 5 (36%) | |