title: Association between gestational weight gain according to prepregnancy body mass index and short postpartum weight retention in postpartum women.
abstract: OBJECTIVE
  This study aims to assess the relationship among prepregnancy body mass index, gestational weight gain, and postpartum weight retention, and to clarify the predictors of the amount of weight retained by Chinese women after pregnancy.
  
  
  METHODS
  The multistage stratified random sampling was used in the cross-sectional study.
  
  
  RESULTS
  The subjects included 1643 women. Mean gestational weight gain was 15.9 kg and mean postpartum weight retention was 5.1 kg. 43.2% of women gained excessive gestational weight gain and 53.3% of women gained 5 kg or more postpartum weight retention. In addition, the proportions of underweight women with inadequate weight gain and overweight women with excessive weight gain were 24.2% and 52.3%, respectively. Logistic regression analysis showed that the adjusted OR of excessive gestational weight gain was 1.74 (95% CI: 1.09-2.79) in overweight women compared with normal weight women. The postpartum weight retention and the proportion of women with postpartum weight retention of 5 kg or more were significantly higher in the excessive gestational weight gain women than in the adequate gestational weight gain women in all three body mass index groups. The adjusted OR of a weight increase of 5 kg or more was at least 1.90 for underweight, normal weight, and overweight women with a gestational weight gain above the recommended amount compared with those with a gestational weight gain within the recommended amount.
  
  
  CONCLUSIONS
  Gestational weight gain above the recommended amount increases the risk of postpartum weight retention in all body mass index groups.
authors.affiliation: School of Public Health, Peking University Health Science Center, Beijing, China.
authors.forename: Defu
authors.initials: D
authors.lastname: Ma
authors.affiliation: Nestlé Research Center, Beijing, China.
authors.forename: Ignatius M Y
authors.initials: IM
authors.lastname: Szeto
authors.affiliation: Nestlé Research Center, Beijing, China.
authors.forename: Kai
authors.initials: K
authors.lastname: Yu
authors.affiliation: Nestlé Research Center, Beijing, China.
authors.forename: Yibing
authors.initials: Y
authors.lastname: Ning
authors.affiliation: Nestlé Nutrition Institute of China, China.
authors.forename: Wenjun
authors.initials: W
authors.lastname: Li
authors.affiliation: Nestlé Research Center, Beijing, China.
authors.forename: Junkuan
authors.initials: J
authors.lastname: Wang
authors.affiliation: School of Public Health, Peking University Health Science Center, Beijing, China.
authors.forename: Yingdong
authors.initials: Y
authors.lastname: Zheng
authors.affiliation: School of Public Health, Peking University Health Science Center, Beijing, China.
authors.forename: Yumei
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: School of Public Health, Peking University Health Science Center, Beijing, China. Electronic address: zhangyumei111@gmail.com.
authors.forename: Peiyu
authors.initials: P
authors.lastname: Wang
mesh_terms: D000328:Adult; D015992:Body Mass Index; D001835:Body Weight / Q000502:physiology; D003430:Cross-Sectional Studies; D005260:Female; D005865:Gestational Age; D006801:Humans; D039382:Maternal Nutritional Physiological Phenomena; D050177:Overweight / Q000453:epidemiology*; D049590:Postpartum Period / Q000502:physiology*; D011247:Pregnancy / Q000502:physiology*; D012307:Risk Factors; D013851:Thinness / Q000453:epidemiology*; D015430:Weight Gain / Q000502:physiology*
keywords: Body mass index; Gestational weight gain; Postpartum weight retention