Diagnostic Value of CT Arthrography for Evaluation of Osteochondral Lesions at the Ankle

Table 4

Cohen’s kappa values for interobserver reliability.

Parameter	CTA	MRI
	Interobserver agreement SEM	Interobserver agreement SEM
Full thickness cartilage defect
Presence	0.72 0.05	0.55 0.07
Size	0.47 0.05	0.55 0.04
Any cartilage defect
Presence	0.82 0.05	0.55 0.06
Size	0.48 0.05	0.50 0.04
Defect of the subchondral bone
Presence	0.70 0.06	0.78 0.04
Depth	0.60 0.05	0.75 0.04
Size	0.48 0.04	0.63 0.04