Association between Habitual Dietary Salt Intake and Risk of Gastric Cancer: A Systematic Review of Observational Studies

Table 3

High versus low categories of salt and gastric cancer.

Study or subgroup	High salt		Low salt			Odds ratio	Odds ratio
	Events	Total	Events	Total	Weight	M-H, fixed, 95% CI	M-H, fixed, 95% CI
Peleteiro et al. 2011 [11]	144	364	132	346	2.0%	1.06 [0.78, 1.44]
Pourfarzi et al. 2009 [13]	121	213	95	394	0.7%	4.14 [2.90, 5.91]
Campos et al. 2006 [12]	19	30	197	617	0.2%	3.68 [1.72, 7.89]
Kim et al. (men) 2010 [18]	2261	302734	5874	890825	73.9%	1.13 [1.08. 1.19]
Kim et al. (women) 2010 [22]	518	136400	1796	560116	17.5%	1.19 [1.07, 1.31]
Jose M. Ramón et al. 1993 [14]	27	63	33	108	0.3%	1.70 [0.89, 3.25]
Shikata et al. 2006 [19]	30	564	12	663	0.3%	3.05 [1.55, 6.01]
Ngoan et al. (men) 2002 [20]	7	341	27	2039	0.2%	1.56 [0.67, 3.62]
Ngoan et al. (women) 2002 [20]	1	316	8	2876	0.0%	1.14 [0.14, 9.13]
Ward and López-Carrillo 1999 [15]	105	355	75	435	1.2%	2.02 [1.44,2.83]
Tsugane et al. 2004 [21]	130	89048	58	86483	1.5%	2.18 [1.60, 2.97]
Lee et al. 2003 [16]	47	69	22	199	0.1%	17.19 [8.77, 33.68]
Yang et al. 2011 [17]	180	482	120	418	2.0%	1.48 [1.12, 1.96]
Total (95% CI)		530979		1545519	100.0%	1.22 [1.17, 1.27]
Total events	3590		8449
Heterogeneity: Chi^2 = 154.77, df = 12 (𝑃<0.00001); 𝐼^2 = 92%
Test for overall effect: 𝑍 = 9.64 (𝑃<0.00001)