Table 2.
Comparison of absolute Psoriasis Area and Severity Index (PASI) definitions of response with PASI 90 and PASI 75. These data are derived from 23 501 PASI measurements in 10 894 patients
| PASI 90 | |||
|---|---|---|---|
| No | Yes | ||
| PASI ≤ 1·5 | No | 14 817 (63) | 606 (3) |
| Yes | 979 (4) | 7099 (30) | |
| PASI ≤ 1·6 | No | 14 622 (62) | 506 (2) |
| Yes | 1174 (5) | 7199 (31) | |
| PASI ≤ 2a | No | 13 619 (58) | 236 (1) |
| Yes | 2177 (9) | 7469 (32) | |
| PASI 75 | |||
| No | Yes | ||
| PASI ≤ 3 | No | 9814 (42) | 1386 (6) |
| Yes | 1105 (5) | 11 196 (48) | |
| PASI ≤ 3·3 | No | 9532 (41) | 1092 (5) |
| Yes | 1387 (6) | 11 490 (49) | |
| PASI ≤ 3·5 | No | 9359 (40) | 951 (4) |
| Yes | 1560 (7) | 11 631 (49) | |
| PASI ≤ 4b | No | 8737 (37) | 582 (2) |
| Yes | 2182 (9) | 12 000 (51) | |
The data are presented as n (%). aFor PASI 90 and PASI ≤ 2: agreement 90%, Cohen's kappa 0·78 (95% confidence interval 0·77–0·79). bFor PASI 75 and PASI ≤ 4: agreement 88%, Cohen's kappa 0·76 (95% confidence interval 0·75–0·77).