Table 4. Impact of body mass index on gastric cancer risk according to waist circumference and sex

WC (cm) by sex	BMI (kg/m2)	Total			Male			Female
		Person-year	No. of cases	HR (95% CI)*	Person-year	No. of cases	HR (95% CI)†	Person-year	No. of cases	HR (95% CI)†
<90 (M)<85 (F)	<18.5	63,692	99	1.08 (0.87−1.33)	31,940	77	1.10 (0.87−1.40)	31,752	22	1.01 (0.65−1.57)
	18.5−22.9	1,120,480	1,370	1.01 (0.93−1.10)	562,289	989	0.96 (0.88−1.06)	558,192	381	1.18 (1.00−1.40)‡
	23.0−24.9	809,799	963	Ref	460,118	759	Ref	349,681	204	Ref
	25.0−29.9	517,213	634	1.09 (0.98−1.20)	295,048	478	1.06 (0.94−1.19)	222,166	156	1.19 (0.97−1.47)
	≥30.0	5,979	5	0.85 (0.35−2.04)	2,275	3	0.85 (0.27−2.64)	3,704	2	0.89 (0.22−3.58)
≥90 (M)≥85 (F)	<18.5	551	0	N/A	176	0	N/A	375	0	N/A
	18.5−22.9	28,134	50	1.08 (0.79−1.47)	10,981	32	1.17 (0.80−1.72)	17,153	18	0.92 (0.54−1.57)
	23.0−24.9	129,427	207	Ref	70,217	150	Ref	59,210	57	Ref
	25.0−29.9	548,764	831	1.07 (0.92−1.25)	315,854	604	1.05 (0.88−1.26)	232,910	227	1.12 (0.83−1.49)
	≥30.0	87,830	118	1.19 (0.94−1.49)	37,462	84	1.41 (1.07−1.85)‡	50,368	34	0.86 (0.59−1.33)

WC, waist circumference; BMI, body mass index; HR, hazard ratio; M, male; F, female.
Adjusted for age, sex, smoking status, alcohol consumption frequency per week, history of diabetes mellitus, hypertension, and dyslipidemia with consideration of a 2-year latency period.
Adjusted for age, smoking status, alcohol consumption frequency per week, history of diabetes mellitus, hypertension, and dyslipidemia with consideration of a 2-year latency period.
Indicates statistical significance.