Effect on examination ordering by physician attitude, common knowledge, and practice behavior regarding CT radiation exposure

The ability to quickly rule in or rule out conditions effectively strongly influenced the decision to order CT (85%-99%). Fear of litigation influenced CT ordering for those with less experience [odds ratio (OR)=2.3, P<.05]. Residents and primary care physicians were less likely to discuss risks/benefits of CT with patients (P≤.03) compared to those with >5 years of experience (OR=4.0, P=.04).