Table 4.

Scenario #3 Multivariate Regression (CT to evaluate for possible appendicitis).

Characteristic	Odds ratio	95% Confidence interval
% Female	0.84	0.45–1.6
Age ≥ 65 years	1.1	0.30–4.2
Hispanic race	2.9	1.3–6.5
Income > $40,000	1.3	0.47–3.7
Education > high school	0.74	0.38–1.4
Insurance: Clinic Card	1.4	0.49–4.1
Insurance: Medicaid	1.3	0.50–3.5
Insurance: Medicare	0.26	0.026–2.7
Insurance: self-pay	0.90	0.35–2.3