Table 5 Radiographic knee osteoarthritis (OA) according to the worst affected knee and compartment among floor layers (n = 134) compared to graphic designers (n = 120)
From: Occupational kneeling and radiographic tibiofemoral and patellofemoral osteoarthritis
| Â | Floor layers | Graphic designers | ||||
|---|---|---|---|---|---|---|
| Â | Total | OA | Total | OA | Â | Â |
| Â | N | n (%) | N | n (%) | OR* | 95% CI |
≤ 49 years | 43 |  | 7 |  |  |  |
Tibiofemoral |  | 5 (12) |  | 1 (14) | 1.1 | 0.1–13.1 |
Patellofemoral |  | 2 (5) |  | 2 (29) | 0.1 | 0.01–1.3 |
50–59 years | 72 |  | 73 |  |  |  |
Tibiofemoral |  | 12 (17) |  | 4 (6) | 3.6 | 1.1–12.0 |
Patellofemoral |  | 9 (13) |  | 7 (10) | 1.3 | 0.5–3.8 |
≥ 60 years | 19 |  | 40 |  |  |  |
Tibiofemoral |  | 5 (26) |  | 10 (25) | 1.9 | 0.4–7.8 |
Patellofemoral |  | 1 (5) |  | 12 (30) | 0.1 | 0.01–1.1 |