These authors contributed equally to this study.
Clinical association between serum γ-glutamyltransferase levels and the development of insulin resistance in Korean men: a 5-year follow-up study
Article first published online: 9 OCT 2013
© 2013 The Authors. Diabetic Medicine © 2013 Diabetes UK
Volume 31, Issue 4, pages 455–461, April 2014
How to Cite
Diabet. Med. 31, 455–461 (2014)
- Issue published online: 16 MAR 2014
- Article first published online: 9 OCT 2013
- Accepted manuscript online: 16 SEP 2013 02:41AM EST
- Manuscript Accepted: 4 SEP 2013
- Manuscript Revised: 17 JUL 2013
- Manuscript Received: 25 MAR 2013
In recent years, γ-glutamyltransferase has emerged as a predictor of cardiovascular disease, Type 2 diabetes mellitus, the metabolic syndrome and hypertension. However, it is not yet certain whether γ-glutamyltransferase is a predictor for insulin resistance. The aim of this study was to examine the longitudinal association between baseline γ-glutamyltransferase level and the development of insulin resistance in Korean men.
We performed a prospective cohort study, involving 22 931 healthy Korean men without baseline insulin resistance (homeostasis model assessment of insulin resistance, HOMA-IR < 2.7) for 5 years. We checked the HOMA-IR serially to monitor the development of insulin resistance (incidence of HOMA-IR ≥ 2.7). A Cox proportional hazards model was used to determine hazard ratios for insulin resistance by quartile groups of baseline serum γ-glutamyltransferase levels.
During 81 208.6 person-years of follow-up, 3856 (16.8%) cases of insulin resistance developed between 2006 and 2010. After adjusting for multiple covariates, including baseline HOMA-IR, the hazard ratios (95% CI) for incident insulin resistance comparing the second to the fourth quartile of baseline serum γ-glutamyltransferase levels with the first quartile were 1.19 (1.06–1.33), 1.38 (1.23-1.53) and 1.58 (1.41-1.77), respectively (P for trend < 0.001).
Our findings show that serum γ-glutamyltransferase level could be a predictor of the development of insulin resistance in Korean men.