Table 3.

Intraobserver and Interobserver Agreement for CT Findings of PRUJ OA ^a

Feature	Intraobserver (κ)		Interobserver (κ)
Any PRUJ OA	0.933	Almost perfect	0.866	Almost perfect
Radial notch osteophyte	0.860	Almost perfect	0.849	Almost perfect
Radial head osteophyte	0.642	Substantial	0.811	Almost perfect
Joint space narrowing	0.761	Substantial	0.622	Substantial
Subchondral cyst	0.909	Almost perfect	0.804	Almost perfect
Loose bodies	0.849	Almost perfect	0.702	Substantial

^aCT, computed tomography; OA, osteoarthritis; PRUJ, proximal radioulnar joint.