Risk of hepatocellular carcinoma according to body mass index and waist circumference in nonalcoholic fatty liver disease

Table 2 Risk of hepatocellular carcinoma by abdominal obesity and body mass index

Characteristics	BMI (kg/m2)	n	Event (n)	Person-years	Incidence rate	Hazard ratio (95%CI)	P for interaction
No abdominal obesity	< 18.5	828	15	7139	21.0	1.77 (1.06-2.96)	0.012
	18.5-22.9	86305	616	854725	7.2	1 (reference)	-
	23-24.9	212179	825	2149559	3.8	0.65 (0.59-0.73)	-
	25-29.9	295403	867	3012025	2.9	0.62 (0.56-0.69)	-
	≥ 30	7636	27	77780	3.5	1.15 (0.78-1.69)	-
Abdominal obesity	< 18.5	53	2	457	43.8	5.89 (1.43-24.2)	-
	18.5-22.9	6575	50	61235	8.2	1 (reference)	-
	23-24.9	48380	297	474737	6.3	0.92 (0.68-1.24)	-
	25-29.9	353051	1651	3555405	4.6	0.99 (0.75-1.32)	-
	≥ 30	100363	423	1018134	4.2	1.43 (1.06-1.94)	-

Adjusted as adjustment Model 3. Incidence rate per 10000 person-years. BMI: Body mass index; CI: Confidence interval.