title: Screening for gestational diabetes: usefulness of clinical risk factors.
abstract: OBJECTIVE
  There is little consensus regarding selective or universal screening for gestational diabetes. The aim of this study is to determine the influence of risk factors on incidence of GDM in Iranian population by using 75 g OGTT.
  
  
  METHODS
  At the first prenatal visit, 924 pregnant women were assessed for age, BMI, obstetric history, family history of diabetes, and diagnosis of polycystic ovary syndrome before pregnancy. All eligible women underwent 2-h 75 g oral glucose tolerance test. Gestational diabetes was diagnosed according to American Diabetes Association criteria.
  
  
  RESULTS
  During study period, 68 [7.4% (95% CI 5.9-9.2)] cases of GDM were found. Age, pre-pregnancy BMI, and family history of DM were the independent clinical predictors of GDM. In women with age <25, BMI < or = 24.9, and negative family history for diabetes, the risk of GDM was 0.008 (0.001-0.044). This risk increased to 0.250 (0.102-0.495) in women with age > or =30, BMI > or = 30 and positive family history for diabetes. With selective screening and without screening in low risk group, we will do 13.6% (126 of 924) less screening tests while missing potentially 1.5% (1 of 68) of GDM cases.
  
  
  CONCLUSIONS
  Age, BMI, and family history of diabetes were independent risk factors in developing gestational diabetes. Concerning these factors, we do not miss substantial number of GDM cases with selective screening.
authors.affiliation: Department of Endocrinology and Metabolism, Islamic Azad University, Tehran, Iran. nahid.shirazian@gmail.com
authors.forename: Nahid
authors.initials: N
authors.lastname: Shirazian
authors.forename: Roya
authors.initials: R
authors.lastname: Emdadi
authors.forename: Marjan
authors.initials: M
authors.lastname: Mahboubi
authors.forename: Abbas
authors.initials: A
authors.lastname: Motevallian
authors.forename: Zhaleh
authors.initials: Z
authors.lastname: Fazel-Sarjuei
authors.forename: Narges
authors.initials: N
authors.lastname: Sedighpour
authors.forename: Seyade-Fateme
authors.initials: SF
authors.lastname: Fadaki
authors.forename: Narges
authors.initials: N
authors.lastname: Shahmoradi
mesh_terms: D000328:Adult; D000367:Age Factors; D015992:Body Mass Index; D016640:Diabetes, Gestational / Q000175:diagnosis* / Q000453:epidemiology; D005260:Female; D005951:Glucose Tolerance Test / Q000592:standards*; D006801:Humans; D015994:Incidence; D007492:Iran / Q000453:epidemiology; D016015:Logistic Models; D011247:Pregnancy; D011446:Prospective Studies; D012307:Risk Factors; D055815:Young Adult