Table 2. Intrareader intraclass correlation coefficients and average status scores according to the RAMRIS in early arthritis patients (n=15) by two readers.
| Patient population | Early arthritis (n=15) | ||
|---|---|---|---|
| Reader 1 | Reader 2 | ||
| MTP-joints | |||
|
| |||
| BME | ICC (95%CI) | 0.96 (0.89-0.99) | 0.98 (0.95-0.99) |
| Median (IQR, max) | 0.0 (0.0-2.5; 5) | 0.0 (0.0-2.5; 8.5) | |
| Mean (SD) | 1.1 (1.6) | 1.4 (2.3) | |
|
| |||
| Synovitis | ICC (95%CI) | 0.90 (0.74-0.97) | 0.98 (0.94-0.99) |
| Median (IQR, max) | 0.5 (0.0-1.0; 3.5) | 1.0 (0.0-2.0; 5.5) | |
| Mean (SD) | 0.8 (1.2) | 1.3 (1.8) | |
|
| |||
| Tenosynovitis | ICC (95%CI) | 0.97 (0.91-0.99) | 0.84 (0.58-0.94) |
| Median (IQR, max) | 0.0 (0.0-3.5; 8) | 0.0 (0.0; 4.5) | |
| Mean (SD) | 1.7 (2.9) | 0.6 (1.4) | |
|
| |||
| Erosions | ICC (95%CI) | 0.71 (0.35-0.89) | 0.92 (0.78-0.97) |
| Median (IQR, max) | 0.0 (0.0-1.0; 2) | 0.0 (0.0-1.0; 4.5) | |
| Mean (SD) | 0.4 (0.6) | 0.7 (1.2) | |
|
| |||
| MCP-joints | |||
|
| |||
| BME | ICC (95%CI) | 0.86 (0.61-0.95) | 0.80 (0.51-0.93) |
| Median (IQR, max) | 0 (0-0.5; 2.5) | 0 (0-0.5; 2.5) | |
| Mean (SD) | 0.4 (0.8) | 0.3 (0.7) | |
|
| |||
| Synovitis | ICC (95%CI) | 0.88 (0.68-0.96) | 0.96 (0.89-0.99) |
| Median (IQR, max) | 0 (0-1; 2) | 0 (0-1; 4) | |
| Mean (SD) | 0.5 (0.7) | 0.9 (1.3) | |
|
| |||
| Tenosynovitis | ICC (95%CI) | 0.97 (0.91-0.99) | 0.94 (0.83-0.98) |
| Median (IQR, max) | 1 (0-3.5; 4.5) | 0 (0-2; 3.5) | |
| Mean (SD) | 1.4 (1.8) | 1.0 (1.3) | |
|
| |||
| Erosions | ICC (95%CI) | 0.94 (0.82-0.98) | 0.99 (0.96-1.00) |
| Median (IQR, max) | 0 (0-1. 4.5) | 0 (0-1; 5.5) | |
| Mean (SD) | 0.7 (1.3) | 0.8 (1.6) | |
|
| |||
| Wrist | |||
|
| |||
| BME | ICC (95%CI) | 0.77 (0.45-0.92) | 0.90 (0.72-0.96) |
| Median (IQR, max) | 0.5 (0-1.5; 3.5) | 0 (0-2; 5) | |
| Mean (SD) | 0.8 (1.0) | 1.2 (1.6) | |
|
| |||
| Synovitis | ICC (95%CI) | 0.92 (0.71-0.98) | 0.95 (0.81-0.98) |
| Median (IQR, max) | 0 (0-1.5; 3.5) | 0.5 (0-1; 5) | |
| Mean (SD) | 0.8 (1.4) | 1.1 (1.5) | |
|
| |||
| Tenosynovitis | ICC (95%CI) | 0.99 (0.97-1.00) | 0.99 (0.98-1.00) |
| Median (IQR, max) | 0 (0-1; 6) | 0.5 (0-2; 6) | |
| Mean (SD) | 1.1 (1.9) | 1.4 (2.0) | |
|
| |||
| Erosions | ICC (95%CI) | 0.95 (0.86-0.98) | 0.97 (0.90-0.99) |
| Median (IQR, max) | 1 (0-3.5; 6.5) | 1 (0-3; 5) | |
| Mean (SD) | 1.9 (2.1) | 1.4 (1.7) | |
Results are based on a single-measure, absolute agreement, two-way mixed effects model.
Based on the repeated scoring of randomly selected patients (patients are scored twice by each reader).
n: number of patients; MTP: metatarsophalangeal; MCP: metacarpophalangeal; BME: bone marrow edema; ICC: interclass correlation coefficient; CI: confidence interval; IQR: interquartile range; SD: standard deviation