HR (95% CI) for surgically treated OA in the hip or knee according to occupational group and gender
| Hip OA* | Knee OA† | |||
| Men | Women | Men | Women | |
| Office workers (ref.) | 1.00 | 1.00 | 1.00 | 1.00 |
| Construction workers | 1.23 (1.15 to 1.31) | 1.21 (1.03 to 1.43) | 1.27 (1.17 to 1.38) | 1.37 (1.14 to 1.64) |
| Floor- and bricklayers‡ | 1.35 (1.20 to 1.52) | n.e. | 1.49 (1.28 to 1.73) | n.e. |
| Farmers | 1.96 (1.84 to 2.08) | 1.22 (1.12 to 1.33) | 1.14 (1.04 to 1.25) | 0.95 (0.85 to 1.06) |
| Healthcare assistants | 1.11 (0.99 to 1.25) | 1.12 (1.07 to 1.18) | 1.42 (1.23 to 1.64) | 1.34 (1.27 to 1.42) |
↵* 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.