Association between Helicobacter pylori seropositivity and digestive tract cancers

Table 1 Demographic characteristics of digestive tract cancer patients and controls n (%)

	Cancer				Control
	Oral SCC	Esophageal SCC	Gastric adenocarcinoma	Colon adenocarcinoma	1st hospital-based control	2nd hospital-based control	Community-based control
n	199	317	196	240	305	403	395
Age mean ± SD	50.6 ± 9.9	58.3 ± 11.6	63.2 ± 13.5	64.5 ± 12.7	57.1 ± 11.4	60.0 ± 10.2	40.2 ± 6.2
(min, med, max)	(26, 50, 78)	(34, 58, 86)	(22, 65, 91)	(24, 66, 89)	(34, 57, 82)	(39, 60, 84)	(30, 40, 58)
Sex
Male	188 (90.5)	301 (95.0)	123 (62.8)	139 (57.9)	289 (94.8)	374 (92.8)	204 (51.6)
Female	11 (5.5)	16 (5.0)	73 (37.2)	101 (42.1)	16 (5.2)	29 (7.2)	191 (48.4)
Educational level
≤ primary school	117 (58.8)	176 (55.5)	118 (60.2)	133 (55.4)	78 (25.6)	162 (40.2)	41 (10.4)
Junior high & high school	76 (38.2)	120 (37.9)	53 (27.0)	72 (30.0)	93 (30.5)	76 (18.9)	241 (61.0)
> high school	6 (3.0)	21 (6.6)	25 (12.8)	35 (14.6)	134 (43.9)	165 (40.9)	113 (28.6)
Cigarette smoking
No	32 (16.1)	39 (12.3)	101 (51.5)	143 (59.6)	168 (55.1)	248 (61.5)	283 (71.6)
Yes	167 (83.9)	278 (87.7)	95 (48.5)	97 (40.4)	137 (44.9)	155 (38.5)	112 (28.4)
Alcohol consumption
No	64 (32.2)	60 (18.9)	145 (74.0)	193 (80.4)	215 (70.5)	288 (71.5)	298 (75.4)
Yes	135 (67.8)	257 (81.1)	51 (26.0)	47 (19.6)	90 (29.5)	115 (28.5)	97 (24.6)
Betel quid chewing
No	29 (14.6)	149 (47.0)	171 (87.2)	213 (88.8)	280 (91.8)	381 (94.5)	-
Yes	170 (85.4)	168 (53.0)	25 (12.8)	27 (11.2)	25 (8.2)	22 (5.5)	-

SCC: Squamous cell carcinoma.