Prevalence of observed lesions, observed agreement and interobserver reliability when scoring synovitis in MCP joints in patients with RA: standardised scan versus free hand scan
| Standardised scan | Free scan | |||||||||
| Prevalence % (mean) | Binary (yes–no) mean | Semiquantitative (0–3) mean | Prevalence (mean) | Binary (yes–no) mean | Semiquantitative (0–3) mean | |||||
| Observed agreement | Kappa + 95% CI | Observed agreement | Kappa + 95% CI | Observed agreement | Kappa + 95% CI | Observed agreement | Kappa + 95% CI | |||
| SH | Grade 0: 47 | 0.63 | 0.87 (0.86 to 0.9) | 0.46 | 0.87 (0.86 to 0.89) | Grade 0: 33 | 0.63 | 0.69 (0.66 to 0.7) | 0.41 | 0.71 (0.69 to 0.73) |
| Grade 1: 28 | Grade 1: 30 | |||||||||
| Grade 2: 22 | Grade 2: 33 | |||||||||
| Grade 3: 3 | Grade 3 : 4 | |||||||||
| PD | Grade 0: 84 | 0.88 | 0.76 (0.73 to 0.79) | 0.83 | 0.79 (0.76 to 0.8) | Grade 0: 79 | 0.84 | 0.70 (0.68 to 0.72) | 0.78 | 0.75 (0.72 to 0.77) |
| Grade 1: 8 | Grade 1: 12 | |||||||||
| Grade 2: 6 | Grade 2: 8 | |||||||||
| Grade 3: 1 | Grade 3: 1 | |||||||||
| Combined score* (SH+PD) | Grade 0: 47 | 0.62 | 0.85 (0.84 to 0.87) | 0.45 | 0.86 (0.8 to 0.89) | Grade 0: 35 | 0.64 | 0.74 (0.73 to 0.76) | 0.40 | 0.73 (0.72 to 0.76) |
| Grade 1: 29 | Grade 1: 28 | |||||||||
| Grade 2: 21 | Grade 2: 31 | |||||||||
| Grade 3: 3 | Grade 3 : 5 | |||||||||
MCP, metacarpophalangeal; PD, power Doppler; RA, rheumatoid arthritis; SH, synovial hypertrophy.
*EULAR-OMERACT combined score.
EULAR-OMERACT, European League Against Rheumatisms–Outcomes Measures in Rheumatology