Alcohol drinking cessation and its effect on esophageal and head and neck cancers: a pooled analysis.
Level 3 - non-randomized controlled study
Pooled analysis of observational epidemiological studies
PubMed 17487833 · doi:10.1002/ijc.22798
What was done
Authors conducted a pooled analysis of epidemiological literature from 1966 to 2006 to evaluate the association between alcohol cessation and the risk of esophageal and head and neck cancers. Thirteen unique studies encompassing over 5,000 cancer cases were included. Categorical and third-order polynomial (cubic) regression models were fitted to estimate cancer risk over time since cessation.
What was found
Esophageal cancer risk increased in the first 2 years following cessation (OR 2.50, 95% CI 2.23-2.80) before dropping significantly with longer abstention (OR for 15+ years: 0.37, 95% CI 0.33-0.41). Head and neck cancer risk remained elevated up to 10 years after quitting (OR for 5-10 years: 1.26, 95% CI 1.18-1.35) and decreased after 10 years (OR for 10-16 years: 0.67, 95% CI 0.63-0.73). After more than 20 years of cessation, risk for both cancer types did not differ significantly from never drinkers.
Why it matters
This analysis quantifies the multi-decade timeline required for upper aerodigestive tract cancer risks to decline following alcohol cessation, demonstrating that risk normalization to never-drinker levels takes approximately 20 years.
Limits
The abstract does not specify the designs of the 13 included studies, the total number of non-case controls, or adjustments for potential confounders such as smoking status, prior drinking volume, and quitting due to early symptoms of disease.
Cited by
- supports After quitting alcohol, it takes 15 years for esophageal cancer risk to fall by 63% and 16 years for head and neck cancer risk to fall by 33% compared to current drinkers.
- supports In the first 1 to 2 years after quitting alcohol, the risk for certain cancers, including esophageal cancer, spikes by up to 150%, likely due to the sick quitter effect.