Table 2.

Multiple Logistic Regression on Odds of Negative Appendectomy (full cohort)

	Odds Ratio	95% Confidence Interval
Imaging vs. No Imaging (unadjusted)	3.90	3.34 – 4.55
Imaging vs. No Imaging (adjusted)	3.65	3.01 – 4.42
Gender (female vs. male)	2.10	1.76 – 2.51
Age	0.99	0.98 – 0.99
WBC count	0.86	0.84 – 0.89