Clinical epidemiology of gastric cancer in Hehuang valley of China: A 10-year epidemiological study of gastric cancer

Table 3 Gastric cancer characteristics of different ethnic groups in the Hehuang valley n (%)

	Past 5 yr group			P value	Previous 5 yr group			P value
	Muslims (n = 792)	Tibetan (n = 24)	Han (n = 578)		Muslims (n = 576)	Tibetan (n = 18)	Han (n = 391)
Age (yr)				0.511				0.268
20-44	110 (13.9)	4 (16.7)	93 (16.1)		72 (12.5)	3 (16.7)	63 (16.1)
45-85	682 (86.1)	20 (83.3)	485 (84.0)		504 (87.2)	15 (83.3)	328 (83.9)
Sex				0.281				0.310
Male	645 (81.4)	18 (75.0)	486 (84.0)		485 (84.2)	16 (88.9)	316 (80.8)
Female	147 (18.6)	6 (25.0)	92 (20.0)		91 (15.8)	2 (11.1)	75 (19.2)
H. pylori infection				0.002				< 0.001
Positive	340 (43.0)	19 (79.2)	251 (43.4)		182 (31.6)	12 (66.7)	163 (41.7)
Negative	452 (57.1)	5 (20.8)	327 (56.6)		394 (68.4)	6 (33.3)	228 (58.3)
Lauren classification				0.045				< 0.001
Intestinal	527 (66.5)	16 (66.7)	347 (60.0)		427 (74.1)	12 (66.7)	243 (62.1)
Nonintestinal	265 (33.5)	8 (33.3)	231 (40.0)		149 (25.9)	6 (33.3)	148 (37.9)
Tumor location				0.011				0.005
Upper (U)	260 (32.8)	15 (62.5)	192 (33.2)		143 (24.9)	2 (11.1)	121 (31.0)
Middle (M)	86 (10.9)	3 (12.5)	53 (9.2)		45 (7.8)	1 (5.6)	48 (12.3)
Lower (L)	414 (52.3)	4 (16.7)	287 (50.0)		336 (58.3)	11 (61.1)	183 (46.8)
UML	32 (4.0)	2 (8.3)	46 (8.0)		52 (9.0)	4 (22.2)	39 (10.0)

The native Hui and Salar in Qinghai were also included in Muslims; the Hehuang valley, an agricultural area, is located in the eastern Qinghai province, China; P < 0.05, the past 5 years group vs the previous 5 years group. H. pylori: Helicobacter pylori.