Table 5 Odds ratios of the weight retention at six weeks postpartum after the first pregnancy associated with interpregnancy BMI change
| Â | Interpregnancy BMI change | Unadjusted OR (95% CI) | Adjusted OR (95% CI) | |
|---|---|---|---|---|
< 1 | ≥1 | |||
The weight retention at six weeks postpartum after the first pregnancy | ||||
 Lost 1.0 or more | 8 | 10 | 2.23(0.85~5.88) | 2.23(0.89~6.13) |
 Remain stable (±1.0) | 157 | 88 | 1 | 1 |
 Gained 1.0–1.9 | 773 | 468 | 1.08(0.81~1.44) | 1.07(0.80~1.42) |
 Gained 2.0–2.9 | 1579 | 908 | 1.03(0.78~1.35) | 1.00(0.76~1.32) |
 Gained 3.0 or more | 1345 | 1093 | 1.45(1.10~1.90) | 1.42(1.08~1.87) |