title: Pregnancy outcomes of Chinese women with gestational diabetes mellitus defined by the IADPSG's but not by the 1999 WHO's criteria.
abstract: OBJECTIVE
  To compare pregnancy outcomes of women with gestational diabetes mellitus (GDM) newly defined by the International Association of Diabetes and Pregnancy Study Group (IADPSG)'s criteria vs GDM cases missed by a shift from the 1999 World Health Organization (WHO)'s criteria to the IADPSG's.
  
  
  METHODS
  From 2010 to 2012, we recruited 17 808 women who registered within 12 weeks of gestation in Tianjin, China. All women underwent a 50-g 1-h glucose challenge test (GCT) at 24-28 weeks of gestation and further underwent a 75-g 2-h oral glucose tolerance test (OGTT) if the GCT result was ≥7·8 mmol/l. Women were divided into four groups, i.e., GDM defined by both criteria, GDM defined by the IADPSG's only, GDM defined by the 1999 WHO's only and non-GDM by either of them. Large for gestational age (LGA), macrosomia, pregnancy-induced hypertension (PIH) and preterm birth were compared among the four groups. Logistic regression was used to control for confounders.
  
  
  RESULTS
  The use of IADPSG's and the 1999 WHO's criteria detected that 7·7% (n = 1378) and 6·8% (n = 1206) of women had GDM, respectively, with 429 GDM newly identified and 257 women missed by a shift from the 1999 WHO's to the IADPSG's. The IADPSG's newly defined GDM had significantly increased risks of LGA (adjusted OR: 2·23, 95%CI: 1·36-3·64) and macrosomia (2·65, 95%CI: 1·50-4·66) than the 1999 WHO's only defined GDM cases.
  
  
  CONCLUSIONS
  A shift of the 1999 WHO's criteria to the IADPSG's diagnosed more GDM cases who had worse pregnancy outcomes than those cases missed.
authors.affiliation: Tianjin Women and Children's Health Centre, Tianjin, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Pan
authors.affiliation: Tianjin Women and Children's Health Centre, Tianjin, China.|Department of Epidemiology and Biostatistics, School of Public Health, Tianjin Medical University, Tianjin, China.
authors.forename: Junhong
authors.initials: J
authors.lastname: Leng
authors.affiliation: Tianjin Women and Children's Health Centre, Tianjin, China.
authors.forename: Gongshu
authors.initials: G
authors.lastname: Liu
authors.affiliation: Tianjin Women and Children's Health Centre, Tianjin, China.
authors.forename: Cuiping
authors.initials: C
authors.lastname: Zhang
authors.affiliation: Tianjin Women and Children's Health Centre, Tianjin, China.
authors.forename: Huikun
authors.initials: H
authors.lastname: Liu
authors.affiliation: Tianjin Women and Children's Health Centre, Tianjin, China.
authors.forename: Min
authors.initials: M
authors.lastname: Li
authors.affiliation: Tianjin Women and Children's Health Centre, Tianjin, China.
authors.forename: Linglin
authors.initials: L
authors.lastname: Tan
authors.affiliation: Tianjin Women and Children's Health Centre, Tianjin, China.
authors.forename: Huiguang
authors.initials: H
authors.lastname: Tian
authors.affiliation: Department of Medicine and Therapeutics, Hong Kong Institute of Diabetes and Obesity and The Chinese University of Hong Kong-Prince of Wales Hospital-International Diabetes Federation Centre of Education, Hong Kong SAR, China.
authors.forename: Juliana C N
authors.initials: JC
authors.lastname: Chan
authors.affiliation: Chronic Disease Epidemiology Laboratory, Pennington Biomedical Research Center, Baton Rouge, LA, USA.
authors.forename: Gang
authors.initials: G
authors.lastname: Hu
authors.affiliation: Population Cancer Research Program and Department of Pediatrics, Dalhousie University, Halifax, NS, Canada.
authors.forename: Zhijie
authors.initials: Z
authors.lastname: Yu
authors.affiliation: Department of Epidemiology and Biostatistics, School of Public Health, Tianjin Medical University, Tianjin, China.
authors.forename: Xilin
authors.initials: X
authors.lastname: Yang
mesh_terms: D000328:Adult; D044466:Asian People; D001786:Blood Glucose; D002681:China; D016640:Diabetes, Gestational / Q000097:blood / Q000175:diagnosis*; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D011247:Pregnancy; D011256:Pregnancy Outcome
chemical_list: D001786:Blood Glucose