FIGURE 1.

Associations of smoking status and long‐term cooking fuel exposure with liver cancer risk. HRs were stratified by sex, baseline age groups, study regions and adjusted for education, household income, occupation, marital status, alcohol consumption, environmental tobacco smoke, months of storing pesticides at home, long‐term heating fuel exposure, stoves with chimney/extractor, physical activity, BMI, having a refrigerator at home, consumption frequency of fresh fruit, preserved vegetables, red meat, fish and grains at baseline, hepatitis B test result, family history of cancer, medical history of hepatic cirrhosis and diabetes. The size of the box was inversely proportional to the variance of the logarithm of the category‐specific log risk and the vertical lines represent 95% CIs. The numbers above the vertical lines were point estimates for HRs. The analysis was restricted to individuals who had data on solid fuel use and smoking (N = 373 448)