Alcohol consumption and suicide among middle-aged men in Japan
BackgroundFew studies have investigated large population-based cohorts for an association between alcohol consumption and suicide.AimsTo investigate the possible association between alcohol intake and suicide.MethodWe used nationwide population-based cohort data from the Japan Public Health Centre-Based Prospective Study cohort. Atotal of 43 383 men aged 40–69 years participated. Death from suicide was defined according to ICD–10 as codes X60-X84.ResultsDuringthe367817person-years of follow-up, there were 168 suicides. Compared with occasional drinkers, the pooled multivariate relative risk (RR; with 95% CI) of suicide for non-drinkers and regular heavy drinkers was 2.3 (1.2–4.6) and 2.3 (1.2–4.7) respectively. The RR increased with the amount of alcohol consumed (P for trend =0.004).ConclusionsThere is a U-shaped association between alcohol consumption and subsequent suicide.