Table 1.
Characteristics of mothers and children in study compared with term live singleton births not in study.
| In study | |||
|---|---|---|---|
| Characteristic | No (n = 554*) | Yes (n = 2389) | P-value |
| Mother | |||
| Education (≥A-levels), n (%) | 278 (51%) | 1452 (61%) | <0.001 |
| Primiparous, n (%) | 251 (45%) | 1231 (52%) | 0.009 |
| Smoking in pregnancy, n (%) | 112 (23%) | 334 (14%) | <0.001 |
| Pre-pregnancy BMI, median (IQR) | 24.1 (22.0-27.3) | 24.2 (21.9-27.4) | 0.87 |
| Age at child’s birth, years, mean (SD) | 30.3 (4.0) | 30.8 (3.8) | 0.006 |
| Child | |||
| Birthweight, g, mean (SD) | 3486 (487) | 3506 (471) | 0.35 |
| Males, n (%) | 265 (48%) | 1160 (49%) | 0.85 |
| Breastfed for ≥ 4 months, n (%) | 120 (32%) | 968 (42%) | <0.0001 |
| Child at 3 years | |||
| Height, cm, mean (SD) | 95.2 (3.7) | 95.8 (3.5) | 0.16 |
| Weight, kg, median (IQR) | 14.8 (13.6-15.9) | 14.9 (13.8-16.1) | 0.70 |
| Overweight/obese, n (%) | 10 (14%) | 322 (14%) | 0.97 |
| Meals per day, median (IQR) | 5.0 (4.0-5.0) | 5.0 (4.0-6.0) | 0.61 |
n=number, BMI=body mass index, IQR=interquartile range, SD=standard deviation.
*
n for some analyses much lower, particularly for three year characteristics where it is about 70.