Table 1

Intraobserver and interobserver agreement between the two ultrasound investigators as measured by three different statistical methods*

Score	Intraobserver			Interobserver
Score	ICC	κ	Overall agreement (%)	ICC	κ	Overall agreement (%)
ICC, intraclass correlation coefficient; US, ultrasound.
*Intraclass correlation coefficient; unweighted κ and percentages.
Osteophytes	0.80	0.75	87	0.65	0.49	69
Femoral head	0.78	0.69	79	0.63	0.35	54
Joint effusion	0.71	0.58	75	0.45	0.38	63
Synovial profile	0.69	0.55	74	0.60	0.43	65
Global US evaluation of osteoarthritis	0.70	0.60	79	0.56	0.30	54
Global US evaluation of synovitis	0.72	0.63	81	0.58	0.37	62