RAMRIS Synovitis (without RF interaction) | RAMRIS Synovitis (with RF interaction) | |||||
---|---|---|---|---|---|---|
Cutoff | Sensitivity | Specificity | PPV | NPV | AIC | AIC |
8 | 0.35 | 0.80 | 0.36 | 0.80 | 216.9 | 218.9 |
7 | 0.44 | 0.75 | 0.36 | 0.81 | 214.0 | 216.1 |
6 | 0.56 | 0.68 | 0.35 | 0.83 | 212.7 | 213.5 |
5 | 0.64 | 0.60 | 0.33 | 0.84 | 213.2 | 212.1* |
4 | 0.70 | 0.54 | 0.32 | 0.85 | 213.6 | 212.5 |
3 | 0.79 | 0.39 | 0.29 | 0.85 | 215.6 | 217.0 |
2 | 0.86 | 0.26 | 0.26 | 0.85 | 215.6 | 218.3 |
↵* Final model with lowest AIC (see Table 5 for sensitivity, specificity, and PPV and NPV for this model in both RF-positive and RF-negative patients; with OR adjusted for cohort effect). RAMRIS: Rheumatoid Arthritis Magnetic Resonance Imaging Score; RF: rheumatoid factor.