Variables associated with AWO after 1.5 years of follow-up.
| No AWO, n = 64 | Any AWO, n = 37 | Univariable Analysis, OR (95% CI) | Multivariable Analysis, OR (95% CI) | |
|---|---|---|---|---|
| Age, yrs, mean (SD) | 45 (8) | 43 (9) | 0.97 (0.93–1.03) | |
| Male sex, n (%) | 36 (56) | 16 (43) | 1.65 (0.72–3.76) | |
| BMI, kg/m2, mean (SD) | 24 (4) | 25 (4) | 1.05 (0.95–1.15) | |
| Postgraduate studies, n (%) | 44 (69) | 11 (31) | 0.77 (0.32–1.84) | |
| Blue-collar workers, n (%) | 18 (28) | 8 (21) | 0.78 (0.29–2.10) | |
| BASDAI, mean (SD) | 33 (20) | 35 (21) | 1.00 (0.98–1.02) | |
| BASFI, mean (SD) | 19 (20) | 27 (25) | 1.01 (0.99–1.03) | 1.01 (0.99–1.03) |
| Symptom duration, yrs, mean (SD) | 15 (9) | 11 (6) | 0.93 (0.88–0.99) | 0.94 (0.89–0.99) |
| Moderate/high-risk AS-WIS score, n (%) | 22 (35) | 24 (66) | 3.52 (1.50–8.24) | 2.71 (1.04–7.22) |
| Radiographic sacroiliitis, n (%) | 37 (58) | 21 (57) | 0.87 (0.36–2.13) | |
| HLA-B27+, n (%) | 38 (59) | 22 (59) | 1.01 (0.38–2.60) | |
| Anti-TNF treatment, n (%) | 40 (63) | 26 (70) | 1.23 (0.49–3.07) |
Values in bold denote variables associated to AWO or with a trend for association (P < 0.10) in univariable analysis. AS-WIS: Ankylosing Spondylitis Work Instability Scale; AWO: adverse work outcomes; BASDAI: Bath Ankylosing Spondylitis Disease Activity Index; BASFI: Bath Ankylosing Spondylitis Functional Index; TNF: tumor necrosis factor.