Summary
This Mendelian randomization study of 3431 HNSCC cases and 3469 controls provides evidence that both lifetime smoking exposure and weekly alcohol consumption causally increase the risk of both HPV-positive and HPV-negative head and neck squamous cell carcinoma, albeit with differing magnitudes of effect. The findings suggest that smoking and alcohol act as independent risk factors for both HNSCC subtypes, which has implications for understanding shared and distinct aetiological pathways between these recognised disease entities.
Regional applicability
The study's findings are directly applicable to UK clinical and public health contexts, where both HPV-positive and HPV-negative HNSCC occur and smoking and alcohol remain significant modifiable risk factors. These results could inform UK cancer prevention messaging and risk stratification strategies, particularly in understanding how lifestyle modification might reduce cancer burden across both disease subtypes.
Key measures
Comprehensive Smoking Index (CSI); Drinks Per Week; odds ratios (OR) with 95% confidence intervals; P-values for statistical significance
Outcomes reported
The study evaluated the causal effects of lifetime smoking exposure and alcohol consumption on the risk of HPV-positive and HPV-negative head and neck squamous cell carcinoma (HNSCC) using Mendelian randomization analysis in 3431 cases and 3469 controls. Both smoking and alcohol consumption were associated with increased risk of both cancer subtypes.
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