Table 2.

Two-stage pooled odds ratios (ORs) and 95% confidence intervals (CIs) for gastric cancer according to allium vegetables consumption in the Stomach cancer Pooling (StoP) Project consortium.

	Cases		Controls
	n	%a	n	%a	OR (95% CI)	I2 (%)
Allium vegetablesb
1st tertile	2278	37.4	4200	32.3	1
2nd tertile	1827	30.0	3956	30.4	0.80 (0.69–0.93)	59.5%
3rd tertile	1787	29.3	4337	33.3	0.71 (0.56–0.90)	82.2%
Missing	205	3.4	524	4.0
Onionsc
Below the median	3071	53.4	5730	47.5	1
Above the median	2467	42.9	5817	48.2	0.69 (0.55–0.86)	86.6%
Missing	211	3.7	527	4.4
Garlicd
Below the median	1729	58.4	3678	54.0	1
Above the median	1108	37.4	2704	39.7	0.83 (0.75–0.93)	0.0%
Missing	123	4.2	426	6.3

^aPercentages may not add to 100 due to rounding.

^bIncluded studies: StoP ID #2, #3, #5, #6, #8, #9, #10, #11, #12, #17, #21, #23, #25, #26, #30, #33, #36.

^cIncluded studies: StoP ID #3, #5, #6, #8, #9, #10, #11, #12, #17, #21, #23, #25, #26, #30, #36.

^dIncluded studies: StoP ID #8, #9, #10, #11, #12, #21, #23, #25.