Table 1.

Characteristics of subjects

Variables (n)	Sex (male:female)$	Age (mean ± SD)	H. pylori infection positive ratio (%)#
Controls (106)	64/42	60.9 ± 13.2	60.4
FD (111)	45/66	59.5 ± 13.6	53.2
EPS (55)	22/33	57.6 ± 14.3	45.5
PDS (36)	16/20	60.1 ± 13.6	47.2
Others (27)	8/19	62.7 ± 11.8	66.7

^$; Control vs FD; p = 0.004, Controls vs EPS; p = 0.02, Controls vs PDS; p = 0.1, Controls vs Other FD; p = 0.006.

^#; Control vs EPS; p = 0.07, statistical siginificant was assesed by χ² test.

Note; Seven of FD patients were diagnosed as both EPS and PDS.