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

Table 6

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

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
Campos et al. 2006 [12]	19	30	197	617	8.7%	3.68 [1.72, 7.89]
Shikata et al. 2006 [19]	30	564	12	663	13.6%	3.05 [1.55, 6.01]
Ngoan et al. 2002 [20]	8	65	35	4915	1.0%	19.57 [8.69, 44.04]
Tsugane et al. 2004 [21]	130	89048	58	86483	76.6%	2.18 [1.60, 2.97]
Total (95% CI)		89707		92678	100.0%	2.61 [2.02, 3.38]
Total events	187		302
Heterogeneity: Chi^2 = 25.98, df = 3 (𝑃<0.00001); 𝐼^2=88%
Test for overall effect: 𝑍 = 7.29 (𝑃<0.00001)