Table 5 . Multivariate logistic regression of PUD on independent variables using backward Wald method.

Variables in the equation	OR	95% Confidence interval	p -value
Year of endoscopy	0.86	0.85-0.88	<0.001
Age(for each 10 years)	1. 07	1.03-1.12	0.002
Gender
Female	1
Male	1.99	1.79-2.25	<0.001
Urease test
Negative	1
Positive	2.81	2.44-3.24	<0.001