TABLE 6.

Demographic characteristics of patients from other Asian countries

Characteristic	Result for patients from:
	China	Vietnam	Thailand
No. of patients	48	7	31
No. of males/no. of females	36/12	5/2	19/12
Mean age (yr) ± SD	59.7 ± 1.2	36.7 ± 1.9	52.7 ± 1.7
No. (%) of patients with the following diseasea:
Gastritis	29 (60.4)	7 (100)	16 (51.6)
GU	0 (0)	0 (0)	5 (16.1)
DU	0 (0)	0 (0)	10 (32.3)
GC	19 (39.6)	0 (0)	0 (0)
No. (%) of patients harboring isolates with the following vacA genotypes:
s region, s1	48 (100)	7 (100)	31 (100)
m region, m1	31 (64.6)	6 (85.7)	17 (54.8)
i region, i1	48 (100)	7 (100)	31 (100)
d region, d1	48 (100)	7 (100)	31 (100)
No. (%) of patients with the following s-m-i combination:
s1-m1-i1	32 (66.7)	6 (85.7)	17 (54.8)
s1-m1-i2	0 (0.0)	0 (0.0)	0 (0.0)
s1-m2-i1	16 (33.3)	1 (14.3)	14 (45.2)
s1-m2-i2	0 (0.0)	0 (0.0)	0 (0.0)
s2-m2-i1	0 (0.0)	0 (0.0)	0 (0.0)
s2-m2-i2	0 (0.0)	0 (0.0)	0 (0.0)
No. (%) of patients with the following s-m-i-d combination:
s1-m1-i1-d1	32 (66.7)	6 (85.7)	17 (54.8)
s1-m2-i1-d1	16 (33.3)	1 (14.3)	14 (45.2)
s1-m2-i2-d2	0 (0.0)	0 (0.0)	0 (0.0)
s2-m2-i2-d2	0 (0.0)	0 (0.0)	0 (0.0)
Others	0 (0.0)	0 (0.0)	0 (0.0)
No. (%) of patients positive/negative for cagA	48 (100)	7 (100)	31 (100)

^aAbbreviations: GU, gastric ulcer; DU, duodenal ulcer; GC, gastric cancer.