Prepregnancy Body Mass Index as a Significant Predictor of Total Gestational Weight Gain and Birth Weight.
We aimed to describe adherence to gestational weight gain (GWG) recommendations and identify determinants of excessive GWG in a sample of women from Quebec, Canada.



Data were collected from the multi-centre 3D (Design, Develop, Discover) pregnancy cohort study, which included women who delivered between May 2010 and August 2012 at 9 obstetrical hospitals in Quebec, Canada. GWG was calculated for 1145 women and compared to the 2009 Institute of Medicine (IOM) recommendations.



Overall, 51% of participants exceeded the recommendations. Approximately 68% of women with obesity gained weight in excess of the IOM recommendations. The corresponding numbers were 75%, 44%, and 27% in overweight, normal weight, and underweight women, respectively. A prepregnancy BMI of 25 kg/m2or more was the only significant predictor of exceeding GWG recommendations (OR 3.35, 95% CI 2.44-4.64) in a multivariate model. Birth weight was positively associated with GWG. GWG and prepregnancy BMI could explain 3.13% and 2.46% of the variance in birth weight, respectively.



About half of women exceeded GWG recommendations, and this was correlated with infant birth weight. This reinforces the need to develop and evaluate strategies, including nutritional interventions, for pregnant women to achieve optimal GWG.
a Centre de recherche du Centre hospitalier universitaire de Sherbrooke, Sherbrooke, QC.|b Sainte Justine University Hospital Research Center, University of Montreal, Montreal, QC.
Anne-Sophie
AS
Morisset
c School of Epidemiology, Public Health and Preventive Medicine, University of Ottawa, Ottawa, ON.
Lise
L
Dubois
a Centre de recherche du Centre hospitalier universitaire de Sherbrooke, Sherbrooke, QC.
Cynthia K
CK
Colapinto
b Sainte Justine University Hospital Research Center, University of Montreal, Montreal, QC.|d Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital, Shanghai Jiao-Tong University School of Medicine, Shanghai, Huangpu.
Zong-Chen
ZC
Luo
a Centre de recherche du Centre hospitalier universitaire de Sherbrooke, Sherbrooke, QC.|b Sainte Justine University Hospital Research Center, University of Montreal, Montreal, QC.
William D
WD
Fraser
D000293:Adolescent; D000328:Adult; D001724:Birth Weight; D015992:Body Mass Index; D015331:Cohort Studies; D004522:Educational Status; D005260:Female; D047109:Fetal Development; D006801:Humans; D009765:Obesity / Q000150:complications / Q000503:physiopathology; D050177:Overweight / Q000150:complications; D010298:Parity; D016742:Preconception Care; D011247:Pregnancy; D011248:Pregnancy Complications / Q000503:physiopathology; D011792:Quebec; D013851:Thinness / Q000150:complications; D015430:Weight Gain; D055815:Young Adult