Characteristics | Knee MSDs | Lower extremity MSDs | ||
Prevalence (%) | OR (95% CI) | Prevalence (%) | OR (95% CI) | |
Demographic factors | ||||
Gender | ||||
Male | 29.7 | 1 | 40.9 | 1 |
Female | 28.6 | 0.95 (0.85 to 1.07) | 41.3 | 1.02 (0.91 to 1.13) |
Age (years) | ||||
<18–25 | 27.1 | 1 | 35.9 | 1 |
26–35 | 27.9 | 1.04 (0.88 to 1.23) | 41.0 | 1.24 (1.06 to 1.44)* |
36–45 | 29.2 | 1.11 (0.94 to 1.31) | 40.9 | 1.24 (1.06 to 1.47)* |
>46 | 36.0 | 1.52 (1.26 to 1.82)** | 45.1 | 1.46 (1.23 to 1.74)** |
Education level | ||||
Middle school or below | 31.6 | 1 | 41.6 | 1 |
High school | 30.1 | 0.93 (0.81 to 1.06) | 42.3 | 1.03 (0.91 to 1.17) |
College/university or above | 26.9 | 0.80 (0.68 to 0.92)** | 37.8 | 0.85 (0.74 to 0.98)* |
BMI (kg/m2) | ||||
<18.5 | 30.1 | 1.11 (0.90 to 1.37) | 40.4 | 1.05 (0.87 to 1.28) |
18.5–23.9 | 27.9 | 1 | 39.3 | 1 |
24–27.9 | 32.5 | 1.24 (1.11 to 1.38)** | 44.1 | 1.21 (1.10 to 1.35)** |
>28 | 33.2 | 1.28 (1.02 to 1.62)* | 47.1 | 1.37 (1.10 to 1.71)** |
Job experience (years) | ||||
<5 | 24.2 | 1 | 34.0 | 1 |
5–9 | 28.2 | 1.23 (1.06 to 1.43)** | 41.9 | 1.40 (1.22 to 1.61)** |
10–14 | 31.5 | 1.44 (1.24 to 1.67)** | 42.6 | 1.45 (1.26 to 1.65)** |
>15 | 32.7 | 1.52 (1.33 to 1.73)** | 44.3 | 1.55 (1.37 to 1.75)** |
*P<0.05, **p<0.01.
BMI, body mass index; MSDs, musculoskeletal disorders.