Operating characteristics of ToPAS2_cap, ToPAS2_uncap, and ToPAS2_orig for the 3 comparisons: PsA versus the rest, PsA versus psoriasis, and PsA versus unaffected.
| Screening Index | Comparison | AUC | Cutpoint | Sensitivity, % | Specificity, % |
|---|---|---|---|---|---|
| ToPAS2_cap | |||||
| PsA vs the rest | 0.910 | 7 (8) | 92.0 (87.2) | 77.2 (82.7) | |
| PsA vs psoriasis | 0.898 | 7 (8) | 92.0 (87.2) | 73.8 (80.2) | |
| PsA vs unaffected | 0.954 | 7 (8) | 92.0 (87.2) | 89.9 (92.1) | |
| ToPAS_uncap | |||||
| PsA vs the rest | 0.911 | 8 (9) | 92.0 (84.0) | 75.8 (83.5) | |
| PsA vs psoriasis | 0.897 | 8 (9) | 92.0 (84.0) | 71.6 (80.5) | |
| PsA vs unaffected | 0.961 | 8 (9) | 92.0 (84.0) | 91.0 (94.4) | |
| ToPAS2_orig | |||||
| PsA vs the rest | 0.908 | 7 (8) | 86.6 (81.1) | 83.7 (87.8) | |
| PsA vs psoriasis | 0.894 | 7 (8) | 86.6 (81.1) | 80.5 (85.7) | |
| PsA vs unaffected | 0.959 | 7 (8) | 86.6 (81.1) | 95.5 (95.5) |
ToPAS: Toronto Psoriatic Arthritis Screen; PsA: psoriatic arthritis; AUC: area under the curve.