Measure | ⩽PASS* | >PASS* | Accuracy† (%) | κ‡ |
DAS28 | ||||
Remission | 40.3 | 0 | 45.8 | 0.34 |
Low | 64.8 | 0 | 64.5 | 0.59 |
Moderate | 75.8 | 24.2 | 62.5 | 0.54 |
SDAI | ||||
Remission | 17.4 | 0 | 30.7 | 0.14 |
Low | 75.2 | 0 | 73.8 | 0.70 |
Moderate | 74.7 | 25.3 | 61.3 | 0.53 |
CDAI | ||||
Remission | 18.6 | 0 | 31.4 | 0.15 |
Low | 76.2 | 0 | 74.6 | 0.72 |
Moderate | 78.1 | 21.9 | 67.2 | 0.61 |
PAS | ||||
Low | 38.3 | 0 | 46.5 | 0.35 |
Agreement between new PASS cut-off points and existing threshold values is expressed as accuracy (%) and κ values.
*DAS28 PASS = 4.11, SDAI PASS = 16.2, CDAI PASS = 14.7, PAS PASS = 3.56. †Accuracy is the percentage of congruently classified patients divided by all patients. ‡κ is a measure of agreement between raters, ranging in strength from 0 to 1.00.
CDAI, Clinical Disease Activity Index; DAS28, 28-joint Disease Activity Score; PAS, Patient Activity Scale; SDAI, Simplified Disease Activity Index,