Table 4.

Associations between Use of Specific Supplements and Incident Gastric Cancer by Histologic Site among Participants in the SCCS

	Non-Cardia Gastric Cancer a					Cardia Gastric Cancer b
	Events	Person-years*	HR a	95% CI	P-value	Events	Person-years*	HR b	95% CI	P-value
Any Supplement
Rarely/never	84	503,945	REF			15	507,543	REF
Sometimes/always	52	446,374	0.70	0.49-0.99	0.04	16	451,749	0.93	0.45-1.92	0.85
Multivitamin
Rarely/never	94	577,004	REF			16	581,089	REF
Sometimes/always	41	351,074	0.73	0.50-1.06	0.10	14	354,325	1.16	0.56-2.39	0.70
Vitamin C
Rarely/never	113	779,663	REF			25	785,206	REF
Sometimes/always	18	142,336	0.91	0.55-1.51	0.73	5	144,418	0.84	0.32-2.20	0.72
Vitamin E
Rarely/never	116	788,044	REF			25	793,658	REF
Sometimes/always	15	134,359	0.74	0.43-1.28	0.28	4	136,262	0.70	0.24-2.02	0.50
Calcium
Rarely/never	119	786,549	REF			26	792,091	REF
Sometimes/always	12	138,117	0.61	0.33-1.12	0.11	3	140,069	0.56	0.16-1.91	0.36
Garlic pills
Rarely/never	127	864,534	REF			28	870,995	REF
Sometimes/always	3	51,018	0.33	0.11-1.05	0.06	1	51,679	0.49	0.07-3.61	0.48

^aHR adjusted for enrollment age, race (black/white), sex, smoking status (ever/never), diagnosis of stomach or small intestine ulcer, diagnosis of diabetes

^bHR adjusted for enrollment age, race (black/white), and sex

^*Person-years is calculated based records with non-missing covariates that are used for adjustment respectively