Discriminant ability of the health status groups
| Health state (number, % patients) | Good ≤5.0 (n=553, 36%) | Moderate <5.0 to <12.0 (n=755, 49%) | Poor ≥12.0 (n=235, 15%) |
| ASAS HI | 2.1 (1.5) | 7.8 (2.0) | 13.7 (1.5) |
| BASFI | 1.2 (1.5) | 3.8 (2.5) | 6.3 (2.3) |
| BASDAI | 2.1 (1.6) | 4.8 (2.1) | 6.6 (1.9) |
| ASDAS | 1.7 (0.9) | 2.6 (2.1) | 3.7 (1.1) |
| SF-36 PSC | 47.6 (7.1) | 35.7 (8.8) | 28.7 (6.6) |
| EQ-5D | 0.8 (0.1) | 0.6 (0.2) | 0.4 (0.2) |
*Values given as mean (SD) otherwise indicated.
ASAS HI, ASAS Health Index; ASDAS, Ankylosing Spondylitis Disease Activity Score; BASDAI, Bath Ankylosing Spondylitis Disease Activity Index; BASFI, Bath Ankylosing Spondylitis Functional Index; EQ-5D, Euro Quality of Life 5 Dimensions; PSC, physical sum component; SF-36, Short Form 36.