Moderate Alcohol Intake Linked to Higher Risk of Upper Aerodigestive Tract Cancer, Meta-Analysis Finds
France: Even moderate alcohol consumption significantly increases the risk of squamous cell cancers of the upper aerodigestive tract (UADT), a large pooled analysis of 28 prospective cohorts published in the JNCI: Journal of the National Cancer Institute has shown.
The analysis revealed that consuming as little as 5–15 grams of alcohol per day—equivalent to roughly half a standard drink—was associated with a 12% higher risk of UADT cancer compared with very low alcohol intake. Risk estimates rose consistently with each 10-gram increment, reaching 16% in women and 12% in men, highlighting the public health implications of even modest drinking.
The study, conducted by Elmira Ebrahimi and colleagues from the Genomic Epidemiology Branch at the International Agency for Research on Cancer (IARC/WHO), Lyon, France, pooled individual-level data from 2,365,437 participants across multiple geographic regions. Over a median follow-up of 15.5 years, the analysis identified 6,903 cases of UADT squamous cell carcinoma. Researchers used advanced statistical models to account for potential confounders, including age, sex, and smoking status, and examined associations across different types of alcoholic beverages.
Key findings from the meta-analysis include:
- Risk at low to moderate intake: Alcohol consumption of 5–<15 g/day was associated with a 12% higher risk of UADT cancers (HR 1.12) compared with 0.1–<5 g/day.
- Dose-response relationship: Each 10-gram daily increment in alcohol intake increased UADT cancer risk by 16% in women and 12% in men.
- Impact across smoking status: The elevated risk persisted among current smokers (HR 1.14), former smokers (HR 1.10), and never-smokers (HR 1.15).
- Consistency across beverages: The association between alcohol and UADT cancer was observed regardless of the type of alcoholic drink consumed.
- Geographic differences: Risk estimates per 10 g/day varied slightly by region, with Europe-Australia showing HR 1.15, Asia 1.13, and North America 1.11.
These findings reinforce that alcohol acts as an independent risk factor for UADT squamous cell carcinoma, regardless of smoking history. While baseline risks differ—with smokers at higher absolute risk—the consistent increase across populations underscores the broader implications of alcohol consumption on cancer burden.
According to the researchers, the study supports ongoing public health strategies aimed at reducing alcohol intake to lower UADT cancer incidence. “Even moderate alcohol consumption, often considered safe, can meaningfully elevate the risk of upper aerodigestive tract cancers,” Ebrahimi and colleagues noted. “Public health interventions should continue emphasizing alcohol reduction, particularly in populations with other risk factors such as tobacco use.”
The study adds to a growing body of evidence linking alcohol with cancer development beyond the liver, highlighting the need for global awareness and policy measures targeting alcohol consumption. By reducing alcohol intake, individuals can take an important step toward lowering their risk of these often-aggressive cancers.
Reference:
Ebrahimi, E., Naudin, S., Dimou, N., Mayén, A., Wang, M., Abnet, C. C., Åkesson, A., Barnett, M. J., Bellocco, R., Bonn, S. E., Chen, C., Christiani, D. C., Crane, T. E., Eliassen, A. H., Freudenheim, J. L., Gao, Y., Gierach, G., Giovannucci, E. L., Gram, I. T., . . . Ferrari, P. Alcohol consumption and upper aerodigestive tract squamous cell carcinoma: Evidence from 28 prospective cohorts. JNCI: Journal of the National Cancer Institute. https://doi.org/10.1093/jnci/djaf230
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