Determinants of gamma-glutamyltransferase: positive interaction with alcohol and body mass index, negative association with coffee

American Journal of Epidemiology
K Poikolainen, Erkki Vartiainen

Abstract

gamma-Glutamyltransferase is widely used as a marker of alcohol intake although its performance is poor. This might be related to other conditions influencing gamma-glutamyltransferase activity. The authors studied determinants of gamma-glutamyltransferase activity in a random sample (n = 6,010) drawn from the general population aged 25-64 years in Finland in 1992. In regression analysis, coffee intake and drinking boiled coffee were significantly (p < 0.01) negatively related to gamma-glutamyltransferase, whereas age, male gender, the number of cigarettes per day, serum total cholesterol and high density lipoprotein cholesterol, heart rate, and diastolic blood pressure were significantly positively related to gamma-glutamyltransferase. A significant (p = 0.02) positive interaction was observed between alcohol intake and body mass index. In logistic regression analysis, the proportion of elevated gamma-glutamyltransferase values (> or = 50 U/liter) was significantly decreased, compared with lifelong abstainers, at the alcohol intake level of < 40 g/week (odds ratio (OR) = 0.51, 95% confidence interval (CI) 0.29-0.92) and significantly increased at the level of > or = 300 g/week (OR = 2.81, 95% CI 1.35-5.85) among nonobese subje...Continue Reading

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