Table 2 Crude and adjusted odds ratios (ORs) and 95% confidence intervals (CIs) for acute appendicitis of sampled patients.

From: Acute Appendicitis Is Associated with Peptic Ulcers: A Population-based Study

Presence of prior peptic ulcers

Total study sample N = 7148

Patients with acute appendicitis n = 3574

Controls n = 3574

No.

%

No.

%

No.

%

Yes

1377

19.3

775

21.7

602

16.8

Odds ratio (95% CI)

—

1.37*** (1.21~1.54)

1.00

Adjusted OR (95% CI)

—

1.40*** (1.24~1.57)

1.00

  1. The adjusted OR was calculated by a conditional logistic regression which was adjusted for hypertension and diabetes.
  2. ***p < 0.001, **p < 0.01, *p < 0.05.
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