Table 2.

Positive Infection Rates of Salmonella in Cases and Controls in the Age Groups of <50 Years and ≥50 Years

	GBC				XGC		CC			HC			Comparisons among different groups	*P-value among subgroups	Overall *P-value
	Total No.	Positive No./Total No. (%)		Total No.	Positive No./Total No. (%)		Total No.	Positive No./Total No. (%)		Total No.	Positive No./Total No. (%)
		<50 Years	≥50 Years		<50 Years	≥50 Years		<50 Years	≥50 Years		<50 Years	≥50 Years
Female	74	5/31 (16)	7/43 (16)	11	2/6 (33)	0/5	125	17/79 (22)	13/46 (28)	9	0/8	0/1	GBC vs. HC GBC vs. CC GBC vs. XGC XGC vs. HC XGC vs. CC	NA 0.37 0.13 NA 0.23	0.28
Male	26	1/7 (14)	9/19 (47)	13	0/3	5/10 (50)	75	15/47 (32)	6/28 (21)	191	5/186 (3)	0/5	GBC vs. HC GBC vs. CC GBC vs. XGC XGC vs. HC XGC vs. CC	0.001 0.001 0.46 0.002 0.004	<0.001
Total	100	6/38 (16)	16/62 (26)	24	2/9 (22)	5/15 (33)	200	32/126 (25)	19/74 (26)	200	5/194 (3)	0/6	GBC vs. HC GBC vs. CC GBC vs. XGC XGC vs. HC XGC vs. CC	0.003 0.005 0.95 0.013 0.08	0.003

CC, Chronic cholecystitis; GBC, Gall bladder cancer; HC, Healthy controls; XGC, Xanthogranulomatous cholecystitis; *Chi-square test was used; NA, Not applicable as there is no positive case in HC