Table 1.

Characteristics of the patients and the control groups

Variable	Patients		Control
	No	%	No.	%
H. pylori
Negative	40	44.4	40	60.6
Positive	50	55.6	26	39.4
Schistosoma
Negative	32	35.6	66	100
Positive	58	64.4	0	0
Sex
Male	58	64.4	31	47
Female	32	35.6	35	53
Age
< 40 yrs	29	32	38	57.6
≥ 40 yrs	61	68	28	42.4
Total	90	100	66	100