Table 4 . Univariate logistic regression of PUD on year of endoscopy, age, gender and results of the urease test.

Variables tested	OR	95% Confidence interval	p -value
Year of endoscopy	0.86	0.85-0.88	<0.001
Age(for each 10 years)	1.06	1.02-1.09	0.002
Gender
Female	1
Male	1.99	1.79-2.22	<0.001
Urease test
Negative	1
Positive	3.33	2.90-3.82	<0.001