Table 4.

Association of ultrasound results and abscess

Ultrasound result	Unadjusted odds ratio	p value	Adjusted odds ratioa	p value
Definitively positive	32.6	<0.01*	36.4	<0.01*
Definitively positive and ambiguous	8.5	<0.01*	10.8	<0.01*
Ambiguous	1.3	0.64	2.2	0.40

^aAdjusted for age <40 and WBC >10 × 1000/uL

*p < 0.05