Diabetes Care 28:719-725, 2005
© 2005 by the American Diabetes Association, Inc.
Reviews/Commentaries/ADA Statements Meta-Analysis |
Moderate Alcohol Consumption Lowers the Risk of Type 2 Diabetes
A meta-analysis of prospective observational studies
Lando L.J. Koppes, PHD1,2,
Jacqueline M. Dekker, PHD1,
Henk F.J. Hendriks, PHD3,
Lex M. Bouter, PHD1 and
Robert J. Heine, MD, PHD1,4
1 Institute for Research in Extramural Medicine (EMGO Institute), VU University Medical Center, Amsterdam, the Netherlands
2 Department of Public and Occupational Health, VU University Medical Center, Amsterdam, the Netherlands
3 Department of Nutritional Physiology, TNO Nutrition and Food Research, Zeist, the Netherlands
4 Department of Endocrinology, VU University Medical Center, Amsterdam, the Netherlands
Address correspondence and reprint requests to Lando L.J. Koppes, PhD, VU University Medical Center, EMGO Institute, Van der Boechorststraat 7, 1081 BT Amsterdam, Netherlands. E-mail: l.koppes{at}vumc.nl
ABSTRACT
OBJECTIVEThis meta-analysis was undertaken to obtain insight regarding the shape and strength of the relationship between alcohol consumption and the risk of type 2 diabetes, the effects of adjustment for confounders, and the effect of modification by type 2 diabetes definition, sex, and BMI.
RESEARCH DESIGN AND METHODSThe 15 original prospective cohort studies that were included comprise 11,959 incident cases of type 2 diabetes in 369,862 individuals who, on average, were followed for 12 years.
RESULTSAfter pooling the data, a U-shaped relationship was found. Compared with nonconsumers, the relative risk (RR) for type 2 diabetes in those who consumed 6 g/day alcohol was 0.87 (95% CI 0.790.95). For the moderate consumption ranges of 612, 1224, and 2448 g/day, RRs of 0.70 (0.610.79), 0.69 (0.580.81), and 0.72 (0.620.84) were found, respectively. The risk of type 2 diabetes in heavy drinkers ( 48 g/day) was equal to that in nonconsumers (1.04 [0.841.29]). In general, nonsignificant trends for larger RR reduction associated with moderate alcohol consumption were observed for women compared with men, for crude compared with multivariate-adjusted analyses, and for studies that used self-reports instead of testing for type 2 diabetes definition. No differences in RR reductions were found between individuals with low or high BMI.
CONCLUSIONSThe present evidence from observational studies suggests an 30% reduced risk of type 2 diabetes in moderate alcohol consumers, whereas no risk reduction is observed in consumers of 48 g/day.

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Copyright © 2005 by the American Diabetes Association.
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