Table 2.
Frequency and relative risk of returning to pre-pregnancy body mass index +1 kg/m2 or less by second pregnancy within 18–36 months with body mass index category prior to first pregnancy stratified by gestational weight gain during first pregnancy, Washington State, 2003–2013
| Returned to Pre-Pregnancy BMI +1 kg/m2 or less | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
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| Below Recommended GWG | Met Recommended GWG | Exceeded Recommended GWG | ||||||||||
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| n | % | RR | 95% CI | n | % | RR | 95% CI | n | % | RR | 95% CI | |
| Normal | 406 | 80.6 | 1 | Ref | 1272 | 76.5 | 1 | Ref | 19128 | 62.6 | 1 | Ref |
| Overweight/Obese | 1496 | 79.9 | 0.99 | (0.92 – 1.07) | 1653 | 67.2 | 0.88 | (0.85 – 0.92) | 5645 | 49.3 | 0.79 | (0.78 – 0.80) |
(GWG = Gestational Weight Gain; BMI = Body Mass Index)
a
BMI categories: Normal = 18.5 to 24.9, Overweight/Obese = 25 to 40
b
GWG categories based on Institute of Medicine recommendations for maternal weight gain during pregnancy by BMI. 25–35 pounds for mothers in the normal BMI category, 15–25 pounds for mothers with in overweight category, 11–20 pounds for mothers in the obese category.