Factors associated with no longer working 12 months later.
| Baseline Factors | GEE Poisson Regression† | ||
|---|---|---|---|
| RR | 95% CI | ||
| Work | Job type (labor-intensive vs sedentary) | 1.4 | (0.8–2.5) |
| Absenteeism, %* | 1.02 | (1.01–1.03) | |
| Presenteeism, % | 1.0003 | (0.99–1.01) | |
| Clinical | Commencing biologic (yes vs no) | 1.01 | (0.5–2.3) |
| Uveitis (yes vs no) | 0.5 | (0.2–1.3) | |
| Psoriasis (yes vs no) | 1.2 | (0.5–3.1) | |
| Inflammatory bowel disease (yes vs no) | 0.99 | (0.3–2.8) | |
| Dactylitis (yes vs no) | low no. observations | ||
| Peripheral joint involvement (yes vs no) | low no. observations | ||
| BASDAI (score 0–10) | 0.96 | (0.8–1.1) | |
| BASFI (score 0–10) | 1.02 | (0.9–1.1) | |
| BASMI (score 0–10) | 1.1 | (0.9–1.5) | |
| BAS-G (score 0–10) | 1.1 | (0.9–1.2) | |
| Patient | ASQoL (score 0–18) | 1.03 | (0.97–1.1) |
| EQ-VAS (score 0–100) | 0.99 | (0.98–1.01) | |
| Activity impairment, % | 1.01 | (0.99–1.02) | |
| Spinal pain (score 0–10) | 1.001 | (0.9–1.1) | |
| Chalder Fatigue Scale (score 0–11) | 0.97 | (0.9–1.1) | |
| Sleep disturbance (score 0–20) | 0.99 | (0.95–1.04) | |
| HADS Anxiety (clinical/borderline vs none) | 1.04 | (0.6–1.8) | |
| HADS Depression (clinical/borderline vs none) | 1.5 | (0.8–2.7) | |
↵† Adjusted for age, sex, and deprivation.
↵* Statistically significant difference between those working and no longer working of p < 0.01. GEE: generalized estimating equation; BASDAI: Bath Ankylosing Spondylitis Disease Activity Index; BASFI: Bath AS Functional Index; BASMI: Bath AS Metrology Index; BAS-G: Bath AS Global score; ASQoL: AS Quality of Life questionnaire; EQ-VAS: EuroQol visual analog scale; HADS: Hospital Anxiety and Depression Scale.