title: Maternal Dietary Nutrient Intake and Its Association  with Preterm Birth: A Case-control Study in Beijing,  China.
abstract: This study aimed to evaluate dietary nutrient intake among Chinese pregnant women by comparison with Chinese Dietary Reference Intakes (DRIs) and to explore the association between dietary nutrients and preterm birth. A case-control design was conducted in Beijing with 130 preterm delivery mothers in case group and 381 term delivery mothers in control group. Information on mothers' diet was collected using a food frequency questionnaire, and nutrients and energy intakes were subsequently calculated based on DRIs. Multivariate analysis of variance was used to compare the differences between term and preterm groups in relation to dietary nutrients. Dietary nutrient intakes were imbalanced in both groups compared with Chinese DRIs. Preterm delivery mothers had a lower level of fat and vitamin E intake than term delivery mothers (p < 0.05). Multivariate analysis showed lower vitamin E intake in preterm delivery mothers with a prepregnancy BMI < 18.5 kg/m2 (p < 0.05) and higher carbohydrate intake in preterm delivery mothers with prepregnancy BMI ≥ 24 kg/m2 (p < 0.05). An imbalanced diet in both groups and low level of dietary intakes of fat and vitamin E in preterm group suggest health education measures should be taken to improve the dietary quality of pregnant women, especially for those with an abnormal prepregnancy BMI.
authors.affiliation: Department of Child, Adolescent and Women's Health, School of Public Health, Peking University, Beijing 100871, China. zhangyan_sph@bjmu.edu.cn.
authors.forename: Yan
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Department of Child, Adolescent and Women's Health, School of Public Health, Peking University, Beijing 100871, China. hongzhou@bjmu.edu.cn.
authors.forename: Hong
authors.initials: H
authors.lastname: Zhou
authors.affiliation: Menzies Health Institute Queensland, Griffith University, Queensland 4222, Australia. a.perkins@griffith.edu.au.
authors.forename: Anthony
authors.initials: A
authors.lastname: Perkins
authors.affiliation: Department of Child, Adolescent and Women's Health, School of Public Health, Peking University, Beijing 100871, China. wangyan@bjmu.edu.cn.
authors.forename: Yan
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Menzies Health Institute Queensland, Griffith University, Queensland 4222, Australia. j.sun@griffith.edu.au.|School of Medicine, Griffith University, Queensland 4222, Australia. j.sun@griffith.edu.au.
authors.forename: Jing
authors.initials: J
authors.lastname: Sun
mesh_terms: D000328:Adult; D044466:Asian People; D015992:Body Mass Index; D016022:Case-Control Studies; D002681:China / Q000453:epidemiology; D004032:Diet / Q000009:adverse effects* / Q000208:ethnology; D000072001:Diet, Healthy / Q000208:ethnology; D005260:Female; D006801:Humans; D039382:Maternal Nutritional Physiological Phenomena / Q000208:ethnology; D015999:Multivariate Analysis; D009765:Obesity / Q000208:ethnology / Q000209:etiology / Q000503:physiopathology; D050177:Overweight / Q000208:ethnology / Q000209:etiology / Q000503:physiopathology; D010349:Patient Compliance / Q000208:ethnology; D011247:Pregnancy; D047928:Premature Birth / Q000453:epidemiology / Q000208:ethnology / Q000209:etiology* / Q000517:prevention & control; D012306:Risk; D057566:Self Report; D013851:Thinness / Q000208:ethnology / Q000209:etiology / Q000503:physiopathology; D014504:Urban Health / Q000208:ethnology
keywords: maternal dietary intake, nutrients, preterm birth