Prevalence and incidence of musculoskeletal disorders and disabilities among the study groups in the past 7 days and 12 months
| Body regions | Street sweeper N=180 | Comparison group N=180 | χ2 test |
|---|---|---|---|
| Neck | |||
| Past 12 months | 16.7% | 10.6% | χ2=2.858; p=0.091 |
| Disabled in past 12 months | 10.6% | 9.4% | χ2=0.123; p=0.725 |
| 7 days | 6.7% | 4.4% | χ2=0.847; p=0.357 |
| Shoulders | |||
| Past 12 months | 31.7% | 11.1% | χ2=22.616; p=0.000 |
| Disabled in past 12 months | 24.4% | 9.4% | χ2=14.388; p=0.000 |
| 7 days | 10.6% | 4.4% | χ2=4.844; p=0.028 |
| Elbows | |||
| Past 12 months | 26.7% | 8.9% | χ2=19.459; p=0.000 |
| Disabled in past 12 months | 23.3% | 5.6% | χ2=23.017; p=0.000 |
| 7 days | 16.1% | 4.4% | χ2=13.284; p=0.000 |
| Wrists/hands | |||
| Past 12 months | 29.4% | 18.9% | χ2=5.471; p=0.019 |
| Disabled in past 12 months | 26.1% | 13.3% | χ2=9.281; p=0.002 |
| 7 days | 16.7% | 2.8% | χ2=19.780; p=0.000 |
| Upper back | |||
| Past 12 months | 33.9% | 27.2% | χ2=1.885; p=0.170 |
| Disabled in past 12 months | 26.7% | 18.9% | χ2=3.095; p=0.079 |
| 7 days | 18.9% | 3.9% | χ2=20.065; p=0.000 |
| Lower back | |||
| Past 12 months | 33.3% | 29.4% | χ2=0.632; p=0.427 |
| Disabled in past 12 months | 26.7% | 17.8% | χ2=4.114; p=0.043 |
| 7 days | 15.6% | 8.9% | χ2=3.728; p=0.053 |
| Hips/thighs | |||
| Past 12 months | 26.7% | 20.0% | χ2=2.236; p=0.135 |
| Disabled in past 12 months | 16.7% | 7.8% | χ2=6.628; p=0.010 |
| 7 days | 17.2% | 6.7% | χ2=9.534; p=0.002 |
| Knees | |||
| Past 12 months | 1.7% | 3.9% | χ2=1.6457; p=0.200 |
| Disabled in past 12 months | 0.6% | 3.3% | χ2=3.6423; p=0.056 |
| 7 days | 1.7% | 0.6% | χ2=1.0112; p=0.315 |
| Ankles/feet | |||
| Past 12 months | 3.9% | 2.2% | χ2=0.8440; p=0.358 |
| Disabled in past 12 months | 1.7% | 2.2% | χ2=0.1457; p=0.703 |
| 7 days | 2.2% | 0.6% | χ2=1.8254; p=0.177 |