Diabetes Care 31:1037-1039, 2008 DOI: 10.2337/dc07-1957 © 2008 by the American Diabetes Association
Modestly Elevated Glucose Levels During Pregnancy Are Associated With a Higher Risk of Future Diabetes Among Women Without Gestational Diabetes Mellitus
1 Department of Obstetrics & Gynecology, University of Washington, Seattle, Washington Address correspondence and reprint requests to Darcy B. Carr, MD, MS, Obstetrics & Gynecology, Box 356460, University of Washington, Seattle, WA 98195-6460. E-mail: darcarr{at}u.washington.edu OBJECTIVE—To determine whether 1-h oral glucose challenge test (OGCT) or 3-h oral glucose tolerance test (OGTT) results below gestational diabetes mellitus (GDM) criteria are associated with developing diabetes. RESEARCH DESIGN AND METHODS—A retrospective cohort study was performed among women without GDM who had a pregnancy OGCT (n = 24,780) or OGTT (n = 6,222). Subsequent diabetes was ascertained by ICD-9 codes or pharmacy or laboratory data over a median follow-up of 8.8 years.
RESULTS—Diabetes risk increased across OGCT quartiles: adjusted hazard ratio (HR) 1.67 (95% CI 1.07–2.61) for 5.4–6.2 mmol/l, 2.13 (1.39–3.25) for 6.3–7.3 mmol/l, and 3.60 (2.41–5.39) for CONCLUSIONS—Women with modestly elevated glucose levels below the threshold for GDM had a higher risk for diabetes.
Abbreviations: GDM, gestational diabetes mellitus OGCT, oral glucose challenge test OGTT, oral glucose tolerance test
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