title: The Prevalence of Gestational Diabetes Mellitus Among Asian Females is Lower Using the New 2013 World Health Organization Diagnostic Criteria.
abstract: OBJECTIVE
  To determine the impact of the new 2013 World Health Organization (WHO) criteria for gestational diabetes mellitus (GDM) diagnosis on GDM prevalence and pregnancy outcomes in Asian ethnic groups compared to the 1999 WHO criteria.
  
  
  METHODS
  A retrospective cohort study included 855 pregnant females of Chinese, Malay, and Asian Indian ethnicity at high risk of GDM who underwent 75-g oral glucose tolerance tests (OGTTs) between July 2008 and June 2010 in a tertiary center in Singapore. GDM prevalence, reclassification, and pregnancy outcomes were determined using the 2013 and 1999 diagnostic cutoffs for fasting and 2-hour postglucose (PG) values.
  
  
  RESULTS
  The prevalence of GDM was reduced from 28.8% to 21.1% when the 2013 criteria were used. Overall, 10.2% subjects were reclassified from GDM to normal using the 2013 criteria, and 2.6% were reclassified from normal to GDM, giving a net reclassification rate of 12.8%. Reclassification from GDM to normal was greatest among Chinese, followed by Asian Indians, but the prevalence rate was unchanged among Malays. Babies of mothers who were reclassified from normal to GDM were more likely to have birth weight >95th centile and shoulder dystocia.
  
  
  CONCLUSIONS
  The prevalence of GDM was reduced when the 2013 criteria were used, with the greatest reduction seen among Chinese, followed by Asian Indians. Lowering the fasting cutoff as per the new criteria identified a select group of patients who might benefit from GDM treatment. However, raising the 2-hour PG cutoff would miss a significant number of patients who might potentially benefit from GDM treatment.
authors.affiliation: Department of Medicine, National University Health System.
authors.forename: Tong Wei
authors.initials: TW
authors.lastname: Yew
authors.affiliation: Department of Medicine, National University Health System.
authors.forename: Chin Meng
authors.initials: CM
authors.lastname: Khoo
authors.affiliation: Department of Medicine, National University Health System.
authors.forename: Ah Chuan
authors.initials: AC
authors.lastname: Thai
authors.affiliation: Department of Obstetrics and Gynecology, National University Health System.
authors.forename: Anita Sugam
authors.initials: AS
authors.lastname: Kale
authors.affiliation: Department of Obstetrics and Gynecology, National University Health System.
authors.forename: Eu Leong
authors.initials: EL
authors.lastname: Yong
authors.affiliation: Department of Medicine, National University Health System Department of Epidemiology and Public Health, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.
authors.forename: E Shyong
authors.initials: ES
authors.lastname: Tai