Demographic and clinical characteristics of responders and nonresponders in the reliability study. Values are means (SD) unless otherwise indicated.
| Responders, n = 33* | Nonresponders, n = 43 | |
|---|---|---|
| Age, yrs | 45.7 ± 13.5 | 40.5 ± 11.7 |
| Male, n (%) | 27 (79.4) | 31 (72.1) |
| Education, median † | 5 | 4 |
| Crohn disease, n (%) | 21 (63.6) | 26 (60.5) |
| Ulcerative colitis, n (%) | 11 (33.3) | 18 (41.9) |
| Unclassified colitis, n (%) | 1 (3) | 0 |
| Age of onset of back pain, yrs | 23.8 ± 9.0 | 25.1 ± 9.7 |
| Disease duration, median yrs | 17 | 13 |
| BASDAI†† | 3.7 ± 2.6 | 4.1 ± 2.6 |
| BASFI†† | 3.7 ± 3.0 | 3.5 ± 3.1 |
| ESR, mm/h, median | 6.5 | 13.0 |
| CRP mg/dl, median | 8 | 7 |
↵* The response of 1 patient was dropped because of incomplete information.
↵† On a scale of 1 to 5: 1 = below grade 8; 2 = high school incomplete; 3 = high school graduate; 4 = college; 5 = university.
↵†† On a 10-point scale. All p values are > 0.05. BASDAI: Bath Ankylosing Spondylitis Disease Activity Index; BASFI: Bath Ankylosing Spondylitis Functional Index; ESR: erythrocyte sedimentation rate; CRP: C-reactive protein.