Alcohol increases circulatory disease mortality in Russia: acute and chronic effects or misattribution of cause?

BACKGROUND: There is a consensus that the large fluctuations in mortality seen in Russia in the past two decades can be attributed to trends in alcohol consumption. However, the precise mechanisms linking alcohol to mortality from circulatory disease remain unclear. It has recently been argued that a substantial number of such deaths currently ascribed to cardiovascular disorders are misclassified cases of acute alcohol poisoning. METHODS: Analysis of routine mortality data and of a case-control study of mortality among working-age (25-54 years) men occurring in the Russian city of Izhevsk, west of the Ural mountains, 2003-05. Interviews were carried out with proxy informants for both the dead cases (N = 1750) and the controls (N = 1750) selected at random from a population register. Mortality was analysed according to indicators of alcohol problems. RESULTS: Hazardous drinking was associated with an increased risk of death from circulatory diseases as a whole [odds ratio (OR) = 4.14, 95% confidence interval (CI) 3.23, 5.31] adjusted for age, smoking and education. The association with alcoholic cardiomyopathy was particularly strong (OR = 15.7, 95% CI 9.5, 25.9). Although there was no association with deaths from myocardial infarction (MI; OR = 1.17, 95% CI 0.59, 2.32), there was a strong association with the aggregate of all other ischaemic heart disease (IHD; OR = 4.04, 95% CI 2.79, 5.84). Stronger associations for each of these causes (other than MI) were seen with whether or not the man had drunk very heavily in the previous week. However, associations also remained when analyses were restricted to subjects with no evidence of recent heavy drinking, suggesting that misclassification of acute alcohol poisonings is unlikely to explain these overall associations. CONCLUSION: Taken as a whole, the available evidence suggests that the positive association of alcohol with increased cardiovascular disease mortality may be best explained as being the result of a combination of chronic and acute alcohol consumption resulting in alcohol-related cardiac disorders, especially cardiomyopathy, rather than being due to misclassification of acute alcohol poisoning. Further work is required to understand the mechanisms underlying the link between heavy alcohol consumption and deaths classified as being due to IHD (other than MI).

Hazardous alcohol drinking and premature mortality in Russia: a population based case-control study.

BACKGROUND: The reason for the low life expectancy in Russian men and large fluctuations in mortality are unknown. We investigated the contribution of alcohol, and hazardous drinking in particular, to male mortality in a typical Russian city. METHODS: Cases were all deaths in men aged 25-54 years living in Izhevsk occurring between Oct 20, 2003, to Oct 3, 2005. Controls were selected at random from the city population and were frequency matched to deaths by age. Interviews with proxy informants living in the same household as cases were done between Dec 11, 2003, and Nov, 16 2005, and were obtained for 62% (1750/2835) of cases and 57% (1750/3078) of controls. We ascertained frequency and usual amount of beer, wine, and spirits consumed and frequency of consumption of manufactured ethanol-based liquids not intended to be drunk (non-beverage alcohol), and markers of problem drinking. Complete information on markers of problem drinking, frequency of alcohol consumption, education, and smoking was available for 1468 cases and 1496 controls. FINDINGS: 751 (51%) cases were classed as problem drinkers or drank non-beverage alcohol, compared with 192 (13%) controls. The mortality odds ratio (OR) for these men, compared with those who either abstained or were non-problematic beverage drinkers, was 6.0 (95% CI 5.0-7.3) after adjustment for smoking and education. The mortality ORs for drinking non-beverage alcohol in the past year (yes vs no) was 9.2 (7.2-11.7) after adjustment for age. Adjustment for volume of ethanol consumed from beverages lowered the OR to 8.3 (6.5-10.7), and further adjustment for education and smoking reduced it to 7.0 (5.5-9.0). A strong direct gradient with mortality was seen for frequency of non-beverage alcohol drinking independent of volume of beverage ethanol consumed. 43% of mortality was attributable to hazardous drinking (problem drinking or non-beverage alcohol consumption, or both) adjusted for smoking and education. INTERPRETATION: Almost half of all deaths in working age men in a typical Russian city may be accounted for by hazardous drinking. Our analyses provide indirect support for the contention that the sharp fluctuations seen in Russian mortality in the early 1990s could be related to hazardous drinking as indicated by consumption of non-beverage alcohol.