Table 4
Associations of meniscal injury with occupational activities
| Occupational activity (in an average working day) | No. of cases exposed | No. of controls exposed | OR (95% CI) |
|---|---|---|---|
| *For definition see text. | |||
| Each occupational activity was analysed in a separate regression model with adjustment for participation in sport (soccer, other, none). Subjects were classified as exposed to an activity if they reported it at the birthday preceding the onset of their symptoms or those of their matched case. | |||
| Sitting for >2 hours in total | 26 | 150 | 0.8 (0.4 to 1.6) |
| Standing or walking for >2 hours in total | 43 | 184 | 1.5 (0.8 to 3.1) |
| Kneeling for >1 hour in total | 23 | 56 | 2.5 (1.3 to 4.8) |
| Squatting for >1 hour in total | 20 | 47 | 2.5 (1.2 to 4.9) |
| Getting up from kneeling or squatting >30 times | 23 | 76 | 1.9 (1.0 to 3.8) |
| Driving for >4 hours in total | 8 | 40 | 0.9 (0.4 to 2.1) |
| Walking for >2 miles in total | 25 | 102 | 1.1 (0.6 to 2.2) |
| Climbing >30 flights of stairs | 18 | 59 | 2.0 (1.0 to 4.1) |
| Lifting or moving weights of 10+ kg by hand | 31 | 120 | 1.7 (0.9 to 3.1) |
| Lifting or moving weights of 25+ kg by hand | 20 | 86 | 1.3 (0.7 to 2.5) |
| Work in an occupation likely to involve kneeling or squatting* | 17 | 61 | 2.3 (1.1 to 4.8) |
