3.
“颈-肩-上背-下背”WMSDs多部位患病情况
Prevalence of multi-site WMSDs in “neck-shoulder-upper back-lower back”
| Numbers of affected site | Workers, n | Constituent ratio/% |
| 0 | 1 918 | 23.9 |
| 1 | 1 309 | 16.3 |
| 2 | 1 479 | 18.4 |
| 3 | 1 297 | 16.2 |
| 4 | 2 018 | 25.2 |
| Total | 8 021 | 100.0 |
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