Variables | Cutoff for Low Disease Activity | Sensitivity | Specificity | Overall Accuracy | PPV | NPV | Youden Index | κ* |
---|---|---|---|---|---|---|---|---|
MDAphys | ||||||||
MDA-5 | 5 | 46 | 93 | 74 | 81 | 72 | 39 | 0.48 |
MDA-6 | 6 | 29 | 99 | 71 | 94 | 68 | 28 | 0.42 |
MDA-7 | 7 | 15 | 100 | 66 | 96 | 64 | 15 | 0.32 |
MDA-joints | 5 | 35 | 97 | 72 | 87 | 69 | 32 | 0.44 |
PASDAS | 3.2 | 64 | 93 | 82 | 85 | 80 | 57 | 0.63 |
CPDAI-4 | 4 | 69 | 76 | 73 | 67 | 78 | 45 | 0.46 |
CPDAI-3 | 3 | 58 | 88 | 75 | 77 | 75 | 46 | 0.51 |
DWC | ||||||||
MDA-5 | 5 | 40 | 98 | 65 | 96 | 55 | 38 | 0.30 |
MDA-6 | 6 | 25 | 100 | 57 | 100 | 50 | 25 | 0.14 |
MDA-7 | 7 | 13 | 100 | 50 | 100 | 46 | 13 | 0.01 |
MDA-joints | 5 | 29 | 99 | 59 | 99 | 51 | 28 | 0.18 |
PASDAS | 3.2 | 52 | 98 | 72 | 97 | 61 | 50 | 0.44 |
CPDAI-4 | 4 | 63 | 82 | 71 | 83 | 62 | 45 | 0.43 |
CPDAI-3 | 3 | 51 | 94 | 69 | 92 | 58 | 45 | 0.38 |
↵* κ: prevalence adjusted, bias adjusted κ. MDA: minimal disease activity; PPV: positive predictive value; NPV: negative predictive value; MDA-5: MDA criteria with 5 items required; MDA-6: MDA criteria with 6 items required; MDA-7: MDA criteria with 7 items required; MDA-joints: MDA criteria mandating the articular items; PASDAS: Psoriatic Arthritis Disease Activity Score; CPDAI: Composite Psoriatic Disease Activity Index; CPDAI-4: CPDAI score with 4 as cutoff; CPDAI-3: CPDAI score with 3 as cutoff.