Associations between physical work load factors and disability retirement due to knee osteoarthritis among men and women
| HR* | 95% CI | HR† | 95% CI | HR‡ | 95% Cl | |
| Men | ||||||
| Heavy physical work | 2.38 | 2.21 to 2.57 | 1.39 | 1.23 to 1.59 | 1.26 | 1.12 to 1.43 |
| Kneeling/squatting ≥1 hour/day | 2.40 | 2.22 to 2.58 | 1.35 | 1.20 to 1.51 | 1.26 | 1.13 to 1.41 |
| Heavy lifting ≥20 kg, ≥10 times/day | 2.09 | 1.93 to 2.26 | 0.97 | 0.86 to 1.09 | 0.98 | 0.87 to 1.10 |
| Sitting ≥5 hours/day | 0.28 | 0.25 to 0.32 | 0.44 | 0.38 to 0.51 | 0.68 | 0.59 to 0.79 |
| Standing or moving ≥5 hours/day | 2.52 | 2.32 to 2.73 | 1.28 | 1.14 to 1.44 | 1.11 | 0.99 to 1.24 |
| Women | ||||||
| Heavy physical work | 2.75 | 2.57 to 2.95 | 1.92 | 1.76 to 2.10 | 1.49 | 1.36 to 1.63 |
| Kneeling/squatting ≥1 hour/day | 1.94 | 1.75 to 2.15 | 1.34 | 1.20 to 1.49 | 1.12 | 1.01 to 1.24 |
| Heavy lifting ≥20 kg, ≥10 times/day | 2.13 | 1.94 to 2.35 | 1.04 | 0.92 to 1.16 | 1.01 | 0.90 to 1.14 |
| Sitting ≥5 hours/day | 0.23 | 0.20 to 0.26 | 0.33 | 0.29 to 0.38 | 0.36 | 0.31 to 0.41 |
| Standing or moving ≥5 hours/day | 2.09 | 1.95 to 2.24 | 1.20 | 1.11 to 1.29 | 1.13 | 1.05 to 1.22 |
*Adjusted for age.
†Adjusted for age and mutually (for all variables in the table).
‡Adjusted for age, education and mutually.