Differences in potential confounding factors and fatty acid measures according to growing pains reported at 8.5 years
| No growing pains (78.6%) | Growing pains (21.4%) | p Value | |
|---|---|---|---|
| Gender | |||
| Boy (51%) | 3137 (78.6%) | 855 (21.4%) | 0.972 |
| Girl (49%) | 3018 (78.6%) | 821 (21.4%) | |
| Maternal education | |||
| <O level (23%) | 1350 (77.3%) | 397 (22.7%) | 0.022 |
| O level (35.5%) | 2115 (78.5%) | 579 (21.5%) | |
| >O level (41.5%) | 2539 (80.5%) | 616 (19.5%) | |
| Family social class | |||
| I and II (29.4%) | 1710 (80.4%) | 417 (19.6%) | 0.001 |
| III NM (26.5%) | 1545 (80.7%) | 370 (19.3%) | |
| III M (26.9%) | 1473 (75.7%) | 473 (24.3%) | |
| IV and V (17.2%) | 981 (79.4%) | 254 (20.6%) | |
| Parity | |||
| 0 (46.3%) | 2700 (77%) | 805 (23%) | 0.002 |
| 1 (35.9%) | 2179 (80%) | 545 (20%) | |
| 2+ (17.8%) | 1091 (80.9%) | 258 (19.1%) | |
| Maternal smoking in pregnancy | |||
| None (85.1%) | 5189 (79.4%) | 1344 (20.6%) | 0.005 |
| 1–9 (7.3%) | 421 (75.6%) | 136 (24.4%) | |
| 10+ (7.6%) | 436 (74.8%) | 147 (25.2%) | |
| Child ETS at age 3 | |||
| None (62.1%) | 3592 (80.4%) | 874 (19.6%) | <0.0001 |
| Low–moderate (25%) | 1378 (76.8%) | 417 (23.2%) | |
| High (12.9%) | 701 (75.8%) | 224 (24.2%) | |
| Mean BMI (SD) at age 7 | 16.2 (2) | 16.3 (2.1) | 0.171 |
BMI, body mass index; ETS, environmental tobacco smoke; M manual; NM, non-manual