PMID- 20106959 OWN - NLM STAT- MEDLINE DCOM- 20100503 LR - 20220318 IS - 1758-535X (Electronic) IS - 1079-5006 (Print) IS - 1079-5006 (Linking) VI - 65 IP - 5 DP - 2010 May TI - Sex hormone-binding globulin as an independent predictor of incident type 2 diabetes mellitus in men. PG - 503-9 LID - 10.1093/gerona/glq002 [doi] AB - BACKGROUND: Low levels of sex hormone-binding globulin (SHBG) and total testosterone (T) in men have been associated with increased risk of type 2 diabetes mellitus (T2DM). As total T and SHBG levels are highly correlated, we determined whether SHBG influences the risk of T2DM through T or whether SHBG is an independent predictor of T2DM. METHODS: Longitudinal analyses were conducted on men participating in the Massachusetts Male Aging Study, a population-based study of men aged 40-70 years. Of 1,709 men enrolled in 1987-1989, 1,156 were evaluated 7-10 years later and 853 after 15-17 years. Analyses were restricted to 1,128 men without T2DM at baseline. RESULTS: Ninety new cases of T2DM were identified. After adjustment for age, body mass index, hypertension, smoking, alcohol intake, and physical activity, the hazard ratio (HR) for incident T2DM was 2.0 for each 1 SD decrease in SHBG (95% confidence interval [CI], 1.42-2.82, p < .001) and 1.29 for each 1 SD decrease in total T (95% CI, 1.01-1.66, p = .04). Free T was not associated with T2DM (HR = 1.03, 95% CI, 0.81-1.31, p = .79). The strong association of T2DM risk with SHBG persisted even after additional adjustment for free T (HR = 2.04, 95% CI, 1.44-2.87, p < .0001) or total T (HR = 1.95, 95% CI, 1.34-2.82, p = .0004). CONCLUSIONS: SHBG is an independent predictor of incident T2DM even after adjusting for free T or total T. Free T is not significantly associated with T2DM. SHBG may contribute to the risk of T2DM through nonandrogenic mechanisms, which should be investigated as they may provide novel targets for diabetes prevention. FAU - Lakshman, Kishore M AU - Lakshman KM AD - Director of Epidemiology, New England Research Institutes, Inc., Watertown, MA 02472, USA. FAU - Bhasin, Shalender AU - Bhasin S FAU - Araujo, Andre B AU - Araujo AB LA - eng GR - R01DK51345/DK/NIDDK NIH HHS/United States GR - 1R01AG22356/AG/NIA NIH HHS/United States GR - R01DK44995/DK/NIDDK NIH HHS/United States GR - R01AG04673/AG/NIA NIH HHS/United States GR - 5P30AG031679/AG/NIA NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural DEP - 20100127 PL - United States TA - J Gerontol A Biol Sci Med Sci JT - The journals of gerontology. Series A, Biological sciences and medical sciences JID - 9502837 RN - 0 (Sex Hormone-Binding Globulin) RN - 3XMK78S47O (Testosterone) SB - IM MH - Adult MH - Age Factors MH - Aged MH - Aging/blood/physiology MH - Body Mass Index MH - Diabetes Mellitus, Type 2/*blood/physiopathology MH - Humans MH - Longitudinal Studies MH - Male MH - Middle Aged MH - Proportional Hazards Models MH - Regression Analysis MH - Risk Factors MH - Sex Hormone-Binding Globulin/*analysis MH - Testosterone/blood PMC - PMC2854882 EDAT- 2010/01/29 06:00 MHDA- 2010/05/04 06:00 PMCR- 2011/05/01 CRDT- 2010/01/29 06:00 PHST- 2010/01/29 06:00 [entrez] PHST- 2010/01/29 06:00 [pubmed] PHST- 2010/05/04 06:00 [medline] PHST- 2011/05/01 00:00 [pmc-release] AID - glq002 [pii] AID - 10.1093/gerona/glq002 [doi] PST - ppublish SO - J Gerontol A Biol Sci Med Sci. 2010 May;65(5):503-9. doi: 10.1093/gerona/glq002. Epub 2010 Jan 27.