Table 2 Comparisons of maternal pre-pregnancy BMI and GWG between the case and control groups
Control | Case | Value | df | p | |
|---|---|---|---|---|---|
(n = 2200) | (n = 697) | ||||
1. BMI (kg/m2), mean (SD) | 20.30 (2.27) | 20.50 (2.25) | −2.015 | 2895 | 0.044 |
2. BMI categories, n (%) | |||||
Underweight | 466 (21.2%) | 122 (17.5%) | 4.841 | 3 | 0.184 |
Normal | 1580 (71.8%) | 523 (75.0%) | |||
Overweight | 141 (6.4%) | 49 (7.0%) | |||
Obese | 13 (0.6%) | 3 (0.5%) | |||
3. GWG (kg), mean (SD) | 15.04(5.81) | 15.70 (6.21) | −2.526 | 2895 | 0.012 |
4. GWG categories, n (%) | |||||
Inadequate | 793 (36.0%) | 226 (32.4%) | 7.912 | 2 | 0.019 |
Adequate | 344 (15.6%) | 139 (19.9%) | |||
Excessive | 1063 (48.4%) | 332 (47.7%) | |||