Fig. 2. HRs across seven categories of BMI for HCC incidence according to age.

BMI categories (kg/m²; <18.5, 18.5–20.9, 21–22.9, 23–24.9 [reference], 25–27.4, 27.5–29.9, and ≥30). The midpoint was used as a representative value of each BMI category, except for both ends (17.6 and 31.9), for which the median was used. HRs and 95% confidence intervals were calculated using Cox proportional hazards models with adjustment for sex (for all participants only), age at baseline, household income, smoking status, alcohol use, and physical activity. BMI body mass index, HCC hepatocellular carcinoma, HR hazard ratio.