Table 1.
Sample description
| Variable | Mean ± std or n (percentage) eligible n = 9824 | Mean ± std or n (percentage) included in model n = 7313 | Mean ± std or n (percentage) excluded from model n = 2511 |
|---|---|---|---|
| BMI z-score at 6 y | 0.02 ± 1.04 | 0 ± 1.03 | 0.07 ± 1.1 |
| Waist circumference in cm at 6 y | 52.6 ± 4.5 | 52.5 ± 4.3 | 52.8 ± 4.9 |
| Weekly GWG at t1 in kg | 0.1 ± 0.3 | 0.2 ± 0.3 | 0.1 ± 0.4 |
| Weekly GWG at t2 in kg | 0.4 ± 0.2 | 0.4 ± 0.2 | 0.4 ± 0.2 |
| Weekly GWG at t3 in kg | 0.5 ± 0.2 | 0.5 ± 0.2 | 0.5 ± 0.2 |
| Maternal age in years | 28.9 ± 5.3 | 29 ± 5.1 | 28.7 ± 5.7 |
| Maternal pre-pregnancy BMI in kg/m2 | 23.4 ± 4.2 | 23.4 ± 4.2 | 23.4 ± 4.4 |
| Underweight mothers (BMI < 18.5 kg/m2) | 465 (5.1) | 343 (4.7) | 122 (6.5) |
| Overweight mothers (BMI > 25 kg/m2) | 2377 (25.8) | 1869 (25.6) | 508 (27) |
| Obese mothers (BMI > 25 kg/m2) | 716 (7.8) | 555 (7.6) | 161 (8.6) |
| Breastfeeding, at least one month fulltime | 6703 (73.2) | 5043 (73.2) | 1660 (73) |
| Smoking, any time during pregnancy | 1162 (12) | 806 (11) | 356 (15.2) |
| Parental SES “high”/“medium”/“low” | 3129 (33.2)/3688 (39.1)/2614 (27.7) | 2313 (31.6)/2933 (40.1)/2067 (28.3) | 816 (38.5)/755 (35.6)/547 (25.8) |