Table 2. Distribution of BMI and GWG categories and birthweight z-scores in the healthy reference and the PGDM populations.
| Reference Median (range) | PGDM Median (range) | ||||||
|---|---|---|---|---|---|---|---|
| BMI (kg/m2) | 23.0 (17.0–41.0) | 25.4 (19.8–44.1) | |||||
| GWG/week (kg/week) | 0.37 (0.01–0.73) | 0.46 (-0.14–0.95) | |||||
| Category | % | Mean BW z-score | n | % | Mean BW z-score | ||
| BMI | normal weight | 101 | 63.1 | -0.11 | 22 | 44.9 | 0.62 |
| overweight | 43 | 26.9 | 0.17 | 14 | 28.6 | 2.02 | |
| obese | 9 | 5.6 | -0.52 | 11 | 22.4 | 0.59 | |
| p * | 0.224 | 0.001* | |||||
| GWG | insufficient | 47 | 29.4 | -0.16 | 6 | 12.2 | 0.31 |
| appropriate | 61 | 38.1 | -0.08 | 16 | 32.7 | 0.60 | |
| excessive | 47 | 29.4 | 0.10 | 27 | 55.1 | 1.48 | |
| p * | 0.556 | 0.008* | |||||
| Total group | 155 | -0.06 (-3.02–1.81) | 49 | 1.05 (-2.15–5.82) | |||
PGDM, pregestational diabetes; Body Mass Index, BMI; BMI categories were defined as: normal weight (18.5–25), overweight (25–30), obese (≥30); Gestational Weight Gain, GWG; GWG categories were defined as: insufficient, appropriate, excessive
* Mean birthweight z-score difference between categories tested by univariate linear regression (one-way ANOVA)