Median values for the total RAMRIS and the individual features and the diagnostic accuracy to differentiate RA from other diagnoses per MRI feature. Scores per feature by joint area, median (IQR) values. The cutoffs to dichotomize the scores were 1.75 for synovitis, 2.75 for tenosynovitis, 10.50 for BME, and 5.75 for erosion.
| Total | Wrist | MCP | MTP | Sensitivity | Specificity | PPV | NPV | LR+ | LR− | AUC | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Synovitis | 4.0 (5.0) | 1.5 (3.0) | 1.0 (2.5) | 0.5 (1.0) | 93% | 27% | 0.29 | 0.92 | 1.27 | 0.26 | 0.63 |
| Tenosynovitis | 2.0 (4.0) | 1.0 (3.0) | 0.5 (2.0) | N/A | 65% | 63% | 0.36 | 0.85 | 1.76 | 0.56 | 0.62 |
| BME | 4.5 (6.5) | 2.0 (5.0) | 0.5 (1.5) | 0.5 (1.5) | 37% | 84% | 0.42 | 0.81 | 2.31 | 0.75 | 0.61 |
| Erosions | 3.5 (4.0) | 2.5 (3.0) | 0.5 (1.0) | 0.5 (1.0) | 40% | 78% | 0.36 | 0.64 | 1.82 | 0.77 | 0.60 |
RAMRIS: Rheumatoid Arthritis Magnetic Resonance Imaging Scoring; RA: rheumatoid arthritis; BME: bone marrow edema; IQR: interquartile range; MCP: metacarpophalangeal; MTP: metatarsophalangeal; PPV: positive predictive value; NPV: negative predictive value; LR+: positive likelihood ratio; LR–: negative likelihood ratio; AUC: area under the curve; N/A: non-applicable.