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

Table 5

High versus low categories of salt and gastric cancer in Asia.

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	0.8%	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. 2010 [18]	2779	439134	7670	1450941	94.7%	1.20 [1.15, 1.25]
Shikata et al. 2006 [19]	30	564	12	663	0.3%	3.05 [1.55, 6.01]
Ngoan et al. 2002 [20]	8	657	35	4915	0.2%	1.72 [0.79, 3.72]
Tsugane et al. 2004 [21]	130	89048	58	86483	1.6%	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	2.2%	1.48 [1.12, 1.96]
Total (95% CI)		530197		1544630	100.0%	1.27 [1.22, 1.32]
Total events	3314		8209
Heterogeneity: Chi^2 = 133.98, df = 7 (𝑃<0.00001); 𝐼^2 = 95%
Test for overall effect: 𝑍 = 11.22 (𝑃<0.00001)