Table 3 Multivariable analysis of knees MSDs
Factors | Knees | |
|---|---|---|
P | OR (95% C.I.) | |
Age | 0.021 | 2.052 (1.008–4.181) |
BMI | ||
 18.5~23.9 (Healthy weight) |  |  |
 < 18.5 (Underweight) | 0.316 | 0.532 (0.255–1.112) |
 24.0~27.9 (Overweight) | 0.225 | 1.766 (0.891–3.501) |
  ≥ 28.0 (Obese) | < 0.001 | 2.502 (1.193–5.248) |
Work hours per week | < 0.001 | 2.351 (1.303–4.242) |
Break times during workday | ||
 No rest | Reference | |
 Once or twice | 0.213 | 0.598 (0.321–1.112) |
 Over twice | < 0.001 | 0.461 (0.312–0.681) |
Walking for long periods of time | < 0.001 | 3.206 (1.608–6.391) |
Standing for long periods of time | < 0.001 | 2.504 (1.206–5.202) |
Mental stress | ||
 Low | Reference | |
 Medium | 0.241 | 1.902 (0.699–5.179) |
 High | < 0.001 | 2.351 (1.303–4.242) |
Psychological fatigue | ||
 Low | Reference | |
 Medium | 0.058 | 1.906 (0.983–3.697) |
 High | < 0.001 | 2.604 (1.458–4.651) |
Employment status (1 = temporary/contract, 0 = permanent) | < 0.001 | 4.821 (2.232–10.415) |