Table 3.

Multivariate models for predicting ICU treatment. Odds ratios, p values, and Nagelkerke R² values from binary logistic regression analyses

	Model 1		Model 2		Model 3
Variable	Odds ratio	p value	Odds ratio	p value	Odds ratio	p value
CRP	1.01	< 0.001	1.01	0.001	1.01	0.015
RPE			5.78	0.002	5.07	0.004
ME			2.64	0.011	2.09	0.067
Abscess diameter					1.02	0.006
Model R2	0.17		0.29		0.33

Model 1 only has a clinical predictor, model 2 has a clinical predictor and MRI edema patterns, and model 3 adds the maximal abscess diameter in patients with an abscess. All models have 307 patients in whom ME could be evaluated and other data was available. In model 3, patients with no MRI evidence of abscess or false-positive abscesses in surgery were assigned “0” for maximal abscess diameter