The use of digital photographs for the diagnosis of hand osteoarthritis: the AGES-Reykjavik study

Table 1 Inter- and intraobserver agreement for photograph reading measured by Kappa and Average Measure Intraclass Coefficient (ICC)

	Joint	Interobserver	Interobserver	Intraobserver
		kappa	ICC	ICC
Left	DIP5	0.83	0.85	0.90
	DIP4	0.87	0.83	0.91
	DIP3	0.85	0.84	0.93
	DIP2	0.80	0.84	0.95
	PIP5	0.92	0.79	0.81
	PIP4	0.94	0.78	0.90
	PIP3	0.86	0.86	0.92
	PIP2	0.84	0.81	0.81
	CMC1	0.87	0.88	0.91
Right	DIP5	0.82	0.84	0.87
	DIP4	0.88	0.80	0.94
	DIP3	0.88	0.85	0.93
	DIP2	0.79	0.78	0.95
	PIP5	0.95	0.83	0.88
	PIP4	0.97	0.80	0.89
	PIP3	0.89	0.87	0.89
	PIP2	0.84	0.81	0.84
	CMC1	0.89	0.89	0.95
Average for all 18 joints		0.87	0.83	0.89