Abstract

Background: Detecting the risk of postpartum diabetes in women with gestational diabetes mellitus (GDM) is essential for proper intervention. We investigated whether changes in insulin sensitivity after delivery affect the risk of diabetes in Korean women with GDM. Method: In a prospective cohort including women with GDM, we included those who attended the postpartum visit at 2 months and yearly thereafter. The change in insulin sensitivity was defined as ∆Matsuda index, the difference between the initial postpartum visit and during pregnancy. We analyzed the risk of diabetes according to tertiles of ∆Matsuda index. Results: During 3.4 years of follow-up, 60 out of 347 subjects (17.3%) developed diabetes. The incidence of diabetes decreased as the tertile of ∆Matsuda index increased (26.7%, 17.2%, and 7.8%, P = 0.001). Subjects in the second and third tertile of ∆Matsuda index showed lower risk of diabetes compared to the subjects in the first tertile (HR, 0.45; 95% CI, 0.24-0.82; HR, 0.18; 95% CI, 0.07-0.48) after adjusting for age, family history of diabetes, gravida, lactation, fasting glucose, and postpartum BMI. Conclusion: Amelioration of insulin resistance lowers the risk of diabetes in Korean women with GDM. Although the assessment of insulin sensitivity is not standardized, changes in insulin sensitivity may be a useful predictor for diabetes in women with GDM. Disclosure H.Son: None. J.Moon: None. N.H.Cho: None. H.Jang: None.

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