Table 6

Interobserver reliability results for detection and scoring of synovitis components and for the combined PD US score according to the different joints in static images and in patients

	Static images				Patients
	Wrist	PIP	Knee	MTP	Wrist		PIP		Knee		MTP
	Mean kappa	Mean kappa	Mean kappa	Mean kappa	Mean observed agreement	Mean kappa	Mean observed agreement	Mean kappa	Mean observed agreement	Mean kappa	Mean observed agreement	Mean kappa
SH score (0–3)	0.51	0.69	0.60	0.54	0.5	0.60	0.7	0.52	0.51	0.5	0.76	0.50
SH detection (yes/no)	0.35	0.74	0.81	0.64	0.5	0.23	0.7	0.2	0.51	0.42	0.76	0.34
PD score (0–3)	0.84	0.89	0.85	0.86	0.82	0.67	0.95	0.1	0.53	0.49	0.96	0.54
PD detection (yes/no)	0.91	0.92	0.83	0.89	0.82	0.42	0.95	0.1	0.53	0.41	0.96	0.48
Combined score* (0–3)	0.61	0.75	0.55	0.58	0.87	0.67	0.7	0.53	0.67	0.54	0.72	0.50
Combined score* (SH+PD) (yes/no)	0.61	NA	0.62	NA	0.87	0.43	0.7	0.3	0.67	0.41	0.72	0.39

*EULAR-OMERACT combined score.
MTP, metatarsophalangeal; NA, non-applicable; PD, power Doppler signal; PIP, proximal interphalangeal; SH, synovial hypertrophy.