Table 3

Prevalence of observed lesions, observed agreement and intraobserver reliability when scoring synovitis in MCP joints in patients with RA: standardised scan acquisition versus free scan acquisition

	Standardised scan				Free scan
	Prevalence % (min–max)	Observed agreement (min–max)	Kappa (min–max) + 95% CI		Prevalence % (min–max)	Observed agreement (min–max)	Kappa (min–max) + 95% CI
			Binary (y/n)	Semiquantitative (0–3)			Binary (y/n)	Semiquantitative (0–3)
SH	Grade 0: 0–80	0.40–1	0.0–1 (−0.21–0.3 to 0.6–1)	0.34–1 (0.32–0.45 to 0.9–1)	Grade 0: 0–55	0.50–0.95	0.0–1 (−0.01–0.03 to 0.6–1)	0.44–0.94 (0.21–0.44 to 0.87–0.97)
	Grade 1: 5–45				Grade 1: 5–55
	Grade 2: 0–50				Grade 2: 5–65
	Grade 3: 0–15				Grade 3: 0–5
PD	Grade 0: 55–95	0.65–1	0.22–1 (0.21–0.3 to 0.8–1)	0.26–1 (0.25–0.29 to 0.8–1)	Grade 0: 55–90	0.65–1	0.38–1 (0.36–0.3 to 0.81–1)	0.29–1 (−0.21–0.3 to 0.6–1)
	Grade 1: 0–30				Grade 1: 0–25
	Grade 2: 0–10				Grade 2: 0–15
	Grade 3: 0–5				Grade 3: 0–20
Combined score* (SH+PD)	Grade 0: 0–80	0.40–1	0.39–1 (0.34–0.43 to 0.7–1)	0.32–1 (0.29–0.34 to 0.8–1)	Grade 0: 0–60	0.50–0.95	0.0–1 (−0.11–0.3 to 0.92–1)	0.40–0.93 (0.40–0.52 to 0.76–0.95)
	Grade 1: 10–45				Grade 1: 5–43
	Grade 2: 0–50				Grade 2: 0–70
	Grade 3: 0–15				Grade 3: 0–20

*EULAR-OMERACT combined score.
EULAR-OMERACT, European League Against Rheumatisms–Outcomes Measures in Rheumatology; MCP, metacarpophalangeal; PD, power Doppler; RA, rheumatoid arthritis; SH, synovial hypertrophy.