TABLE 2.
Representativeness of the study sample: maternal and newborn characteristics for the children included in the study sample compared with those lost to follow-up and, within the study sample, compared between maternal allocation groups1
| Included in this study maximum n = 1255 | Lost to follow-up maximum n = 707 | ||||
|---|---|---|---|---|---|
| Variable | n | n | P 2 | ||
| Among all live singleton births in the original trial: | |||||
| Allocation group,3n (%) | |||||
| Control | 649 | (51.7) | 356 | (50.4) | 0.56 |
| Intervention | 606 | (48.3) | 351 | (49.6) | |
| Maternal age, y | 1255 | 24.5 ± 3.9 | 707 | 23.5 ± 3.4 | <0.001 |
| Maternal height, cm | 1255 | 151.3 ± 5.5 | 706 | 151.6 ± 5.4 | 0.19 |
| Maternal prepregnancy BMI,4 kg/m2 | 1254 | 19.8 (17.8, 22.6) | 706 | 19.8 (17.9, 22.1) | 0.64 |
| Maternal SLI score | 1221 | 25.7 ± 5.7 | 683 | 23.7 ± 6.4 | <0.001 |
| Maternal GDM status,3n (%) | |||||
| No GDM | 660 | (89.8) | 230 | (91.3) | 0.50 |
| GDM | 75 | (10.2) | 22 | (8.7) | |
| Child's birthweight, g | 960 | 2611 ± 381 | 407 | 2611 ± 419 | 0.92 |
| Child's sex,3n (%) | |||||
| Male | 671 | (53.5) | 233 | (53.2) | 0.53 |
| Female | 584 | (46.5) | 205 | (46.8) | |
| Among children studied in this follow-up: | Control group maximum n = 649 | Intervention group maximum n = 606 | |||
| Maternal age, y | 649 | 24.7 ± 3.9 | 606 | 24.4 ± 3.8 | 0.17 |
| Maternal height, cm | 649 | 151.2 ± 5.4 | 606 | 151.3 ± 5.6 | 0.91 |
| Maternal prepregnancy BMI,4 kg/m2 | 649 | 19.9 (17.9, 22.6) | 606 | 19.6 (17.7, 22.5) | 0.04 |
| Maternal SLI score | 629 | 25.7 ± 5.6 | 592 | 25.7 ± 5.8 | 0.90 |
| Maternal GDM status,3n (%) | |||||
| No GDM | 336 | (87.7) | 324 | (92.1) | 0.05 |
| GDM | 47 | (12.3) | 28 | (8.0) | |
| Child's birth weight, g | 499 | 2594 ± 393 | 461 | 2629 (368) | 0.11 |
| Child's sex,3n (%) | |||||
| Male | 282 | (56.3) | 248 | (53.6) | 0.40 |
| Female | 219 | (43.7) | 215 | (46.4) | |
1
Values are mean ± SD unless otherwise specified.
2
P values denote the significance of differences between the groups shown
3
Categorical variables are expressed as number n and (%).
4
Skewed variables are expressed as median and (IQR).
GDM, maternal gestational diabetes mellitus; SLI: Standard of Living Index.