[Alcohol intake, Lewis phenotypes and risk of ischemic heart disease. The Copenhagen Male Study].

In the Copenhagen Male Study we found an increased risk of ischaemic heart disease (IHD) in men with the Lewis phenotype Le(a-b-). This study investigated whether, within the group of Le(a-b-) men, any conventional risk factors modified their increased risk. Three thousand, three hundred and eighty-three men aged 53 to 75 years were examined in 1985/86 and their morbidity and mortality over the next four years recorded. Three hundred and forty-three men with cardiovascular diseases were excluded at baseline. Potential risk factors examined were: alcohol consumption, physical activity, tobacco smoking, serum cotinine, serum lipids, body mass index, blood pressure, hypertension, non-insulin dependent diabetes mellitus and social class. In eligible men with Le(a-b-), N = 280 (9.6%), alcohol was the only risk factor associated with risk of IHD. There was a significant inverse dose-effect relationship between alcohol consumption and risk. The age-adjusted p-values of trend tests were for risk of non-fatal + fatal IHD: p = 0.03; for risk of fatal IHD: p = 0.02. In eligible men with other phenotypes, N = 2,649 (90.4%) only a limited and non-significant negative association with alcohol. In Le(a-b-) men, a group genetically at increased risk of IHD, the risk was strongly and significantly negatively correlated with alcohol consumption.