Hazard ratio for first medically certified absence episode by status of coexisting fibromyalgia among employees with osteoarthritis, rheumatoid arthritis or psychiatric disorders calculated from Cox proportional hazards models adjusted for age, sex and occupational status
| Patient group | Number of participants | Number of medically certified episodes (rate/100 person-years) | Adjusted hazard ratio (95% CI) |
|---|---|---|---|
| FM, fibromyalgia; OA, osteoarthritis; RA, rheumatoid arthritis. | |||
| Patients with OA or RA | |||
| No FM | 4689 | 5103 (111.1) | 1 |
| FM | 346 | 570 (170) | 1.44 (1.26 to 1.65) |
| Patients with psychiatric disorders | |||
| No FM | 3857 | 4460 (119.0) | 1 |
| FM | 220 | 389 (182.6) | 1.48 (1.26 to 1.74) |