Risk of developing of rheumatoid arthritis among participants exposed to prolonged repetitive physical workloads in the EIRA
| Baseline | 5 years before baseline | ||||
|---|---|---|---|---|---|
| Types of physical workloads | Cases/controls | OR* (95% CI) | Cases/controls | OR* (95% CI) | |
| Repetitive bending/turning | Unexposed | 923/1941 | 1.0 (ref) | 963/2039 | 1.0 (ref) |
| Exposed | 1446/2067 | 1.5 (1.3 to 1.6) | 1925/2531 | 1.6 (1.5 to 1.8) | |
| Repetitive hand/finger movements | Unexposed | 678/1351 | 1.0 (ref) | 824/1546 | 1.0 (ref) |
| Exposed | 1691/2652 | 1.3 (1.1 to 1.4) | 2060/3020 | 1.3 (1.2 to 1.4) | |
| Lift or carry more than 10 kg | Unexposed | 1274/2418 | 1.0 (ref) | 1284/2496 | 1.0 (ref) |
| Exposed | 1095/1585 | 1.3 (1.2 to 1.5) | 1602/2077 | 1.5 (1.4 to 1.7) | |
| Precision work | Unexposed | 2098/3584 | 1.0 (ref) | 2536/4061 | 1.0 (ref) |
| Exposed | 265/398 | 1.1 (1.0 to 1.4) | 344/487 | 1.1 (1.0 to 1.3) | |
| Hands below knee level | Unexposed | 1908/3448 | 1.0 (ref) | 2215/3827 | 1.0 (ref) |
| Exposed | 456/546 | 1.5 (1.3 to 1.8) | 668/736 | 1.6 (1.4 to 1.8) | |
| Hands above shoulder level | Unexposed | 1802/3331 | 1.0 (ref) | 2028/3675 | 1.0 (ref) |
| Exposed | 568/668 | 1.6 (1.4 to 1.8) | 857/893 | 1.8 (1.6 to 2.0) | |
| Vibration | Unexposed | 1993/3492 | 1.0 (ref) | 2353/3927 | 1.0 (ref) |
| Exposed | 374/499 | 1.4 (1.2 to 1.6) | 535/634 | 1.5 (1.3 to 1.8) | |
*OR adjusted for age (10 strata), sex and residential area; baseline is the year when the participants were diagnosed with rheumatoid arthritis.
EIRA, Epidemiological Investigation of Rheumatoid Arthritis; ref, reference.