Longitudinal Associations of Former and Current Alcohol Consumption with Psychosocial Outcomes among Colorectal Cancer Survivors 1-15 Years after Diagnosis

We aimed to explore positive and negative associations of consuming alcohol with psychosocial outcomes among colorectal cancer (CRC) survivors. We used data of an observational prospective cohort study, consisting of 2625 Dutch CRC survivors enrolled 1-11 years post-diagnosis that were followed-up in 4 yearly surveys. Generalized estimated equation models were used to examine longitudinal associations between alcohol consumption and anxiety, depression, and health-related quality of life (HRQoL), while correcting for sociodemographic, lifestyle and clinical characteristics. Compared to lifetime abstainers, former alcohol consumption was associated with more depressive symptoms, and worse global quality of life and social functioning, while current drinking was associated with less anxiety, depression and better HRQoL. More drinks per week was associated with less nausea/vomiting. Compared to abstainers, moderate (<= 7 drinks/week) and heavy alcohol consumption (>7 drinks/week) were associated with less anxiety and depression and better HRQoL, mostly attributable to wine consumption. Whereas current alcohol consumption was longitudinally associated with less anxiety and depression and better HRQoL, former drinking was associated with worse psychosocial outcomes, although based on a small sample size. It is important to consider that besides the potential negative effects of alcohol on patients' health, alcohol consumption may be positively related with psychosocial outcomes.