The Impact of Maternal Obesity and Excessive Gestational Weight Gain on Maternal and Infant Outcomes in Maine: Analysis of Pregnancy Risk Assessment Monitoring System Results from 2000 to 2010
Table 5
Maternal predictors of infant born prematurely (<37 wks of gestation).
Comparison
Odds ratio (95% CI)
Smoked before pregnancy only/never smoked
0.925 (0.736–1.161)
0.5008
Smoked before and during pregnancy/never smoked
1.010 (0.823–1.239)
0.9261
Age
1.017 (1.002–1.032)
0.0227
First live birth/previous live birth
1.425 (1.230–1.650)
<0.0001
Not married/married
1.046 (0.873–1.254)
0.6238
Education ≤ 12 yrs/> 12 yrs
0.911 (0.769–1.079)
0.2802
Prepregnancy BMI
1.019 (1.009–1.028)
0.0001
Annual HH income ≤ 20 k/> 20 k
1.255 (1.032–1.524)
0.0227
Urban or suburban/rural town or isolated rural
0.884 (0.772–1.012)
0.0740
Nonwhite/white
1.341 (0.825–2.178)
0.2360
Drank alcohol prior to pregnancy/did not drink alcohol
0.787 (0.680–0.911)
0.0013
Did not drink alcohol in last 3 months of pregnancy/drank
0.832 (0.621–1.116)
0.2192
Gestational age when being sure she is pregnant
1.025 (1.006–1.045)
0.0101
Gestational age at first prenatal visit
0.972 (0.949–0.996)
0.0217
Pregnancy weight gain < recommended/recommended
1.645 (1.401–1.931)
<0.0001
Pregnancy weight gain > recommended/recommended
0.721 (0.610–0.853)
0.0001
Logistic regression results with infant being born at < 37 weeks of gestation as the dependent variable. Infants were more likely to be born at < 37 weeks of gestational age which is greater for mothers who were older, were having their first birth, had a higher prepregnancy BMI, lived in a household with an annual income < 20,000/year, were sure they were pregnant at a later gestational age, or had a gestational weight gain < recommended range. Infants were less likely to be born at < 37 weeks of gestational age if their mother drank alcohol before pregnancy, has her first prenatal visit at an earlier gestational age, or had a gestational weight gain <> recommended range.
