Table 4. Adjusted* a relative risk for the associations between pre-pregnancy BMI and weight for gestational age.
| Weight for gestational age | Underweight | Normal weight | Overweight | Obesity |
|---|---|---|---|---|
| NSAG | ||||
| Term | – | 1.00 (reference) | – | – |
| 34–36 week | 0.88 (0.58–1.34) | 1.00 (reference) | 1.29 (0.80–2.06) | 1.40 (0.59-3.29) |
| <34 week | 1.52 (0.94–2.47) | 1.00 (reference) | 1.48 (0.77–2.84) | 0.97 (0.23-4.11) |
| SAG | ||||
| Term | 1.78 (1.45-2.17) | 1.00 (reference) | 0.88 (0.63–1.21) | 1.89 (0.48-1.66) |
| 34–36 week | 1.49 (0.79–2.81) | 1.00 (reference) | 0.43 (0.10–1.82) | 0.86 (0.12-6.41) |
| <34 week | 0.73 (0.20–2.63) | 1.00 (reference) | 1.62 (0.44–5.89) | 2.23 (0.28-17.91) |
Notes.
Abbreviations
- NSAG
- non-small for gestational age
- SAG
- small for gestational age
*
Adjusted OR and 95% CI were calculated by the logistic regression model after adjusting for age, health insurance, occupation and education.