Table 1.

Baseline characteristics of the patients.

	Group A	Group B	Group C	P value
Age (y) (mean ± s.d.)	45.80 ± 10.96	47.01 ± 13.75	49.92 ± 10.24	.203
Gender (male/female)	21/29	19/31	17/33	.712
BMI (body mass index)	23.01 ± 2.86	22.09 ± 2.42	22.71 ± 3.02	.245
Minorities				.329
The Han nationality	50	48	50
Others	0	2	0
Other diseases				.928
Diabetes	2	1	0
Hypertension	2	2	2
Others	2	1	1
Diagnosis				.912
Chronic gastritis with dyspepsia	21	24	27
Chronic erosive gastritis	10	13	10
Chronic gastritis with constipation	21	16	18
Asymptomatic	4	3	4