TABLE 3.
Proportions of MOCs with Lower Body and Torso Musculoskeletal Injury by Cluster.
| C1 (low-risk) | C2 (moderate-risk) | C3 (high-risk) | Fisher’s exact test p value | Relative-risk (95% CI) | |||
|---|---|---|---|---|---|---|---|
| C3/C1 | C2/C1 | C3/C2 | |||||
| %MSKI | 28/203 = 13.8% | 47/209 = 22.5% | 78/256 = 30.5% | <0.001 | 2.2 (1.5–3.3) | 1.6 (1.1–2.5) | 1.3 (1.0–1.9) |
| %MSKI Male | 26/195 = 13.3% | 45/201 = 22.4% | 38/151 = 25.2% | 0.011 | 1.9 (1.2–3.0) | 1.7 (1.1–2.6) | 1.1 (0.77–1.6) |
| %MSKI Female | 2/8 = 25.0% | 2/8 = 25.0% | 40/105 = 38.1% | 0.770 | 1.5 (0.5–5.1) | 1.0 (0.2–5.5) | 1.5 (0.5–5.1) |
| %Male | 195/203 = 96.1% | 201/209 = 96.2% | 151/256 = 59.0% | <0.001 | |||
| %Female | 8/203 = 3.9% | 8/209 = 3.8% | 105/256 = 41.0% | <0.001 | |||
Fisher's exact test comparing clusters; p < 0.05 across all three clusters; Relative-Risk (95% confidence interval) comparing between clusters; MSKI = Musculoskeletal Injury; Each MOCs received a MSKI, or noMSKI label: MSKI = lower body and torso and noMSKI = upper body, head and neck, and noMSKI; %MSKI = (MSKI/(MSKI + noMSKI)); %MSKI Male=(Male MSKI/(Male MSKI+Male noMKSI)); %MSKI Female=(Female MSKI/(Female MSKI+Female noMSKI)); %Female=(Female/(Female+Male)); %Male = (Male/(Female+Male)).