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Diabetes Care. 2014 May;37(5):1296-303. doi: 10.2337/dc13-1965. Epub 2014 Feb 21.

Prepregnancy SHBG concentrations and risk for subsequently developing gestational diabetes mellitus.

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  • 1Corresponding author: Monique M. Hedderson, monique.m.hedderson@kp.org.



Lower levels of sex hormone-binding globulin (SHBG) have been associated with increased risk of diabetes among postmenopausal women; however, it is unclear whether they are associated with glucose intolerance in younger women. We examined whether SHBG concentrations, measured before pregnancy, are associated with risk of gestational diabetes mellitus (GDM).


This was a nested case-control study among women who participated in the Kaiser Permanente Northern California Multiphasic Health Check-up examination (1984-1996) and had a subsequent pregnancy (1984-2009). Eligible women were free of recognized diabetes. Case patients were 256 women in whom GDM developed. Two control subjects were selected for each case patient and were matched for year of blood draw, age at examination, age at pregnancy, and number of intervening pregnancies.


Compared with the highest quartile of SHBG concentrations, the odds of GDM increased with decreasing quartile (odds ratio 1.06 [95% CI 0.44-2.52]; 2.33 [1.07-5.09]; 4.06 [1.90-8.65]; P for trend < 0.001), after adjusting for family history of diabetes, prepregnancy BMI, race/ethnicity, alcohol use, prepregnancy weight changes, and homeostasis model assessment of insulin resistance. Having SHBG levels below the median (<64.5 nmol/L) and a BMI ≥25.0 kg/m(2) was associated with fivefold increased odds of GDM compared with normal-weight women with SHBG levels at or above the median (5.34 [3.00-9.49]).


Low prepregnancy SHBG concentrations were associated with increased risk of GDM and might be useful in identifying women at risk for GDM for early prevention strategies.

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[Available on 2015/5/1]
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