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

Table 8

High versus low categories of salt and gastric cancer through salty food.

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
Pourfarzi et al. 2009 [13]	121	213	95	394	12.3%	4.14 [2.90, 5.91]
Campos et al. 2006 [12]	19	30	197	617	2.9%	3.68 [1.72, 7.89]
Ngoan et al. (men) 2002 [20]	8	657	35	4915	3.5%	1.72 [0.79, 3.72]
Mary H. Ward 1999	105	355	75	435	20.3%	2.02 [1.44, 2.83]
Tsugane et al. 2004 [21]	130	89048	58	86483	25.1%	2.18 [1.60, 2.97]
Lee et al. 2003 [16]	47	69	22	199	1.5%	17.19 [8.77, 33.68]
Yang et al. 2011 [17]	180	482	120	418	34.4%	1.48 [1.12, 1.96]
Total (95% CI)		90854		93461	100.0%	2.41 [2.08, 2.78]
Total events	610		602
Heterogeneity: Chi^2 = 56.59, df = 6 (𝑃<0.00001); 𝐼^2 = 89%
Test for overall effect: 𝑍 = 11.75; (𝑃<0.00001)