HR (95% CI) for surgically treated OA in the hip or knee according to cumulative years in occupation among men and women
| Hip OA* | Knee OA† | |||
| Men | Women | Men | Women | |
| Office workers (ref.) | 1.00 | 1.00 | 1.00 | 1.00 |
| Construction workers | ||||
| 1–5 years | 1.05 (0.97 to 1.13) | 1.17 (0.97 to 1.41) | 0.95 (0.86 to 1.05) | 1.19 (0.95 to 1.47) |
| 6–10 years | 1.18 (1.08 to 1.29) | 1.21 (0.78 to 1.88) | 1.45 (1.30 to 1.62) | 1.98 (1.33 to 2.97) |
| >10 years | 1.83 (1.68 to 2.00) | 1.57 (0.97 to 2.52) | 1.96 (1.75 to 2.20) | 2.06 (1.26 to 3.37) |
| Floor- and bricklayers‡ | ||||
| 1–5 years | 0.94 (0.77 to 1.13) | n.e. | 1.04 (0.81 to 1.34) | n.e. |
| 6–10 years | 1.44 (1.21 to 1.72) | n.e. | 1.58 (1.26 to 1.99) | n.e. |
| >10 years | 2.23 (1.81 to 2.73) | n.e. | 2.27 (1.75 to 2.95) | n.e. |
| Farmers | ||||
| 1–5 years | 1.63 (1.52 to 1.74) | 1.10 (1.00 to 1.21) | 0.92 (0.82 to 1.02) | 0.88 (0.77 to 0.99) |
| 6–10 years | 2.38 (2.20 to 2.57) | 1.59 (1.37 to 1.84) | 1.42 (1.26 to 1.61) | 1.25 (1.03 to 1.51) |
| >10 years | 3.00 (2.71 to 3.32) | 1.62 (1.19 to 2.20) | 1.83 (1.55 to 2.15) | 0.91 (0.56 to 1.46) |
| Healthcare assistants | ||||
| 1–5 years | 0.99 (0.85 to 1.15) | 0.89 (0.83 to 0.95) | 1.24 (1.04 to 1.45) | 1.05 (0.97 to 1.13) |
| 6–10 years | 1.04 (0.79 to 1.37) | 1.09 (1.01 to 1.18) | 1.09 (0.75 to 1.57) | 1.27 (1.17 to 1.38) |
| >10 years | 1.71 (1.36 to 2.14) | 1.57 (1.46 to 1.69) | 2.44 (1.90 to 3.14) | 1.92 (1.78 to 2.08) |
↵* Adjusted for age (underlying timescale), calendar period, income and unemployment.
↵† Adjusted for age (underlying timescale), calendar period, income, unemployment and knee injury.
↵‡ Floor- and bricklayers was a subgroup of construction workers, the group had too few women to make analysis possible.
n.e., not estimable; OA, osteoarthritis.