Long-term air pollution exposure was linked to liver cancer
An observational evidence review found associations with liver cancer diagnoses and deaths, with different patterns across pollutants and outcomes.
Based on the published abstract. The full paper may contain additional methods, results and limitations.
The 30-second takeaway
Higher fine-particle exposure was associated with more liver cancer diagnoses and deaths. Nitrogen dioxide exposure was associated with diagnoses, while its association with liver cancer mortality was not statistically significant. Because the underlying studies were observational, these findings do not demonstrate that pollution caused the cancers or deaths.
The abstract does not give follow-up durations, participant totals or the full set of adjustment factors. Adjusted observational estimates can still reflect other differences between people and places.
What researchers found
Liver cancer incidence: relative hazard
Per 1 μg/m3 higher PM2.5 versus lower exposure over the long term; exact follow-up was unreported.
Diagnoses and deaths differ
The review examined both developing liver cancer and dying from it. The nitrogen dioxide results show why these endpoints need separate interpretation: an association with diagnoses did not establish an association with deaths.
Reading the ratio
The ratio compares diagnosis rates over time among people not yet diagnosed with liver cancer. Its estimate and interval indicate a small relative increase, but the abstract does not provide absolute chances.
The original publication
Air Pollution and the Risk of Liver Cancer Incidence and Mortality: A Systematic Review and Meta-Analysis.
Yu G, Cui Y, Kang R et al.
Liver Int · 2025
- PubMed ID
- 41144931
- Record checked
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