TABLE 1.

Odds Ratios Comparing Imaging Modality Effects on Residents’ Ability to Correctly Classify Acetabular Fractures

Imaging Modality	Odds Ratio	95% Confidence Interval	p Value
CT vs. XR	2.0	(1.5–2.7)	0.0001
3D vs. XR	1.9	(1.4–2.6)	0.0001
3D vs. CT	0.9	(0.7–1.3)	0.7098

Evaluation of interobserver agreement showed slight agreement for junior residents when using CT images (κ = 0.172) and an improvement to fair agreement with 3D models (κ = 0.259). Senior residents had fair agreement for both CT (κ = 0.216) and 3D models (κ = 0.351) (Table 2).