Fig. 4

Hazard ratios for mortality according to WC interacted by BMI categories in women aged < 60 years (a–c) and those aged ≥ 60 years (d–f) after adjusting for age, BMI (as a continuous variable), alcohol, smoking and exercise status, Charlson Comorbidity Index, and laboratory tests. The p values for interactions between WC categories (8 groups) and BMI categories (4 groups) on mortality were 0.458 in women aged < 60 years and < 0.001 in those aged ≥ 60 years