title: Risk factors for early diagnosis of gestational diabetes mellitus.
abstract: OBJECTIVE
  To determine factors possibly associated with early development of GDM (before 24 weeks of gestation).
  
  
  METHODS
  A total of 196 pregnant women who were at risk for GDM and started antenatal care at antenatal clinic before 24 weeks of gestation, Siriraj Hospital between January 2002 and December 2002 were enrolled. Those who were known cases of DM before pregnancy were excluded.
  
  
  METHODS
  Screening test with 50 g GCT was offered to all participants at their first visits and 100g OGTT was used as a diagnostic test. If GDM was not diagnosed, they were retested between 28-32 weeks using the same criteria. Early GDM was defined as the diagnosis of GDM before 24 weeks of gestation. Late GDM was defined as the diagnosis of GDM later than 24 weeks of gestation. Clinical risk factors of the 2 groups were compared to determine the association with early development of GDM.
  
  
  RESULTS
  Of 196 women with GDM, 127 (64.5%) were diagnosed before 24 weeks of gestation, and 69 (35.5%) were diagnosed later. Obesity was only one significant risk factor for early development of GDM. Early GDM group were more likely to be obese than late GDM group (20.5% and 8.7% respectively, p = 0.042). Other clinical risks were not significantly different between the 2 groups. Early GDM were more likely to diagnose if 3 or more clinical risk factors were found compared to late GDM group (8.75% and 2.9% respectively) but not significantly different.
  
  
  CONCLUSIONS
  Obese women (BMI e" 27 kg/m2) should attend the screening program at early pregnancy to reduce maternal complications and adverse neonatal outcomes.
authors.affiliation: Department of Obstetrics and Gynecology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok 10700, Thailand.
authors.forename: Sittiwate
authors.initials: S
authors.lastname: Bunthalarath
authors.forename: Prasert
authors.initials: P
authors.lastname: Sunsaneevithayakul
authors.forename: Dittakarn
authors.initials: D
authors.lastname: Boriboohirunsarn
mesh_terms: D000328:Adult; D016640:Diabetes, Gestational / Q000175:diagnosis* / Q000209:etiology; D042241:Early Diagnosis; D005260:Female; D005865:Gestational Age; D005951:Glucose Tolerance Test; D006801:Humans; D008403:Mass Screening; D008423:Maternal Age; D009765:Obesity / Q000150:complications*; D011247:Pregnancy; D011262:Pregnancy Trimester, Second; D011295:Prenatal Care / Q000379:methods; D012307:Risk Factors; D015430:Weight Gain; D055815:Young Adult