Lead: Association of alcohol intake over the lifetime with colorectal adenoma and colorectal cancer risk in the Prostate, Lung, Colorectal, and Ovarian Cancer Screening Trial

Lead: Association of alcohol intake over the lifetime with colorectal adenoma and colorectal cancer risk in the Prostate, Lung, Colorectal, and Ovarian Cancer Screening Trial

Association of alcohol intake over the lifetime with colorectal adenoma and colorectal cancer risk in the Prostate, Lung, Colorectal, and Ovarian Cancer Screening Trial

Cancer

This study analyzed data from the Prostate, Lung, Colorectal, and Ovarian (PLCO) Cancer Screening Trial to look for an association between alcohol intake and colorectal cancer (CRC) or colorectal adenoma. Participants' lifetime pattern of alcohol intake was determined from a dietary history recorded as part of the PLCO trial. Current drinkers with a lifetime average of over 14 drinks per week had a higher CRC risk than those with under 1 drink per week (HR 1.25, p = .003) and an even higher risk of rectal cancer (HR 1.95). There was no consistent association between alcohol intake and colorectal adenoma risk, however results suggested that former drinkers may have a reduced risk of adenoma. They discussed potential mechanisms such as acetaldehyde, a known carcinogen and product of alcohol metabolism, and effects of alcohol on gut microbiome. They conclude that heavy alcohol intake increases CRC risk and that alcohol cessation may lower adenoma risk.

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