Table 1

Reliability of scoring synovitis in static images and in patients with RA

Intraobserver					Interobserver
Static images					Static images
	Prevalence % (min–max)	Observed agreement(min–max)	Kappa (y/n)+95% CI(min–max)	Kappa (0–3)(min–max)	Prevalence % (mean)	Observed agreement(mean)	Mean Kkappa (y/n)+95% CI	Mean Kkappa (0 to 3)+95% CI
GS*	Grade 0: 3.1–17.2	0.66–0.94	−0.05 to 0.94 (0–1 to 0.7–1)	0.59–0.92 (0.1–0.65 to 0.7–0.94)	Grade 0: 11.8	0.77	0.71 (0.16 to 0.73)	0.76 (0.08 to 0.78)
	Grade 1: 4.7–25				Grade 1: 14.0
	Grade 2: 28.1–57.8				Grade 2: 43.9
	Grade 3: 6.3–42.2				Grade 3: 30.3
PD	Grade 0: 57.8–59.4	0.89–1	1–1 (0.89–1 to 1)	0.89–1 (0.7–0.94 to 0.38–1)	Grade 0: 59.3	0.82	0.98 (0.98 to 1)	0.94 (0.92 to 1)
	Grade 1: 1.6–21.9				Grade 1: 7.9
	Grade 2: 14.1–32.8				Grade 2: 22.4
	Grade 3: 6.3–18.8				Grade 3: 10.4