Abstract P522: Alcohol Consumption and Cardiovascular Mortality After Myocardial Infarction
Background: Little is known about alcohol consumption in relation to long-term mortality risk after myocardial infarction (MI). We examined alcohol consumption in relation to total, coronary heart disease (CHD) and cardiovascular disease (CVD) mortality in the Alpha Omega Cohort of Dutch post-MI patients. Methods: We included 4,365 patients (60-80y, 79% male) with MI ≤10y before enrolment. Heavy alcohol users (≥6 glasses/d) were excluded from cohort participation. Dietary intake and alcohol consumption were assessed using a 203-item validated food-frequency questionnaire. Patients were classified as non-drinkers (0 g/d, n=956), very light (>0-≤2 g/d, n=385), light (M: >2-≤10, F: >2-≤5 g/d, n=1,125), moderate (M: >10-≤30, F: >5-≤15 g/d, n=1,207) or heavy drinkers (M :>30, F: >15 g/d, n=692). Hazard ratios (HRs) for total, CHD and CVD mortality were obtained, adjusting for age, sex, education, smoking, BMI, physical activity, energy intake and other dietary factors. Results: Alcohol was consumed by 83% of men and 61% of women. During 11.1y follow up, 2,035 deaths occurred of which 575 from CHD and 801 from CVD. Compared to the reference group of very light drinkers, HRs (95%CI) for total mortality were 1.01 (0.85, 1.19) in non-drinkers, and 0.88 (0.74, 1.04), 0.85 (0.72, 1.01) and 0.91 (0.76, 1.10) in light, moderate and heavy drinkers respectively. Adding non-drinkers to the reference group did not affect HRs: 0.87 (0.78, 0.98), 0.85 (0.76, 0.96) and 0.91 (0.79, 1.05) for light, moderate and heavy drinkers. Associations were slightly stronger but non-significant for CVD and CHD mortality. Findings were roughly similar after exclusion of former drinkers (n=385), diabetics (n=883) and patients with poor health (n=1,010). Conclusion: Light to moderate alcohol consumption was weakly inversely associated with total, CVD and CHD mortality risk in post-MI patients. In this observational study, potential bias and confounding cannot be ruled out and findings should be interpreted cautiously in light of the totality of evidence.