Table 4 Multivariate logistic regression analysis of factors influencing WMSDs in different body parts among electronics manufacturing workers

 Male

1

1

1

1

1

1

 Female

1.67 (1.48 ~ 1.89)^c

1.96 (1.72 ~ 2.23)^c

1.51 (1.30 ~ 1.76)^c

1.49 (1.28 ~ 1.73)^c

1.38 (1.12 ~ 1.69)^b

1.55 (1.30 ~ 1.84)^c

 < 2

1

1

1

1

1

1

1

1

 2 ~ 5

1.11 (0.96 ~ 1.27)

1.06 (0.92 ~ 1.24)

0.89 (0.75 ~ 1.06)

0.92 (0.77 ~ 1.10)

0.78 (0.60 ~ 1.00)

0.74 (0.60 ~ 0.90)^b

0.88 (0.71 ~ 1.09)

0.81 (0.62 ~ 1.04)

 > 5

1.57 (1.38 ~ 1.79)^c

1.59 (1.39 ~ 1.82)^c

1.37 (1.17 ~ 1.60)^c

1.35 (1.15 ~ 1.58)^c

1.10 (0.88 ~ 1.37)

1.09 (0.91 ~ 1.30)

1.33 (1.10 ~ 1.60)^b

1.29 (1.02 ~ 1.62)^a

 Junior middle school or below

1

1

 Senior high school or technical secondary school

1.27 (1.08 ~ 1.50)^b

0.97 (0.80 ~ 1.18)

 Junior college

1.15 (0.92 ~ 1.45)

0.94 (0.72 ~ 1.22)

 Bachelor degree or above

0.97 (0.72 ~ 1.31)

0.54 (0.36 ~ 0.82)^b

 < 18.5

1

1

1

 18.5–23.9

1.31 (1.01 ~ 1.69)

0.96 (0.68 ~ 1.34)

1.02 (0.77 ~ 1.35)

 24–27.9

1.40 (1.05 ~ 1.87)

1.01 (0.69 ~ 1.48)

1.09 (0.79 ~ 1.49)

 ≥ 28

1.82 (1.30 ~ 2.53)^c

1.65 (1.08 ~ 2.53)^a

1.62 (1.13 ~ 2.33)^b

 Never

1

1

1

1

1

1

 Occasionally

1.00 (0.88 ~ 1.14)

1.02 (0.89 ~ 1.18)

0.92 (0.79 ~ 1.08)^a

1.16 (0.93 ~ 1.46)

1.26 (1.05 ~ 1.52)

0.88 (0.73 ~ 1.06)

 2–3 times/month

1.25 (0.95 ~ 1.63)

1.09 (0.81 ~ 1.46)

0.93 (0.66 ~ 1.31)^a

0.94 (0.56 ~ 1.56)

1.31 (0.89 ~ 1.91)

0.78 (0.52 ~ 1.18)

 1–2 times/week

0.77 (0.60 ~ 0.98)^a

0.81 (0.63 ~ 1.05)

0.63 (0.46 ~ 0.86)^b

0.51 (0.30 ~ 0.86)^a

0.59 (0.40 ~ 0.89)

0.52 (0.35 ~ 0.75)^c

 More than 3 times/week

0.66 (0.49 ~ 0.89)^b

0.67 (0.49 ~ 0.93)^a

0.70 (0.48 ~ 1.02)

0.79 (0.45 ~ 1.39)

0.88 (0.57 ~ 1.36)

0.51 (0.31 ~ 0.83)^b

 Often/Always

1.89 (1.68 ~ 2.13)^c

1.89 (1.67 ~ 2.15)^c

2.15 (1.84 ~ 2.51)^c

1.97 (1.69 ~ 2.29)^c

2.26 (1.80 ~ 2.83)^c

2.93 (2.43 ~ 3.53)^c

1.93 (1.60 ~ 2.32)^c

1.82 (1.49 ~ 2.22)^c

1.45 (1.22 ~ 1.72)^c

 Often/Always

2.64 (2.22 ~ 3.14)^c

2.27 (1.89 ~ 2.72)^c

2.23 (1.84 ~ 2.70)^c

2.24 (1.85 ~ 2.72)^c

3.06 (2.41 ~ 3.88)^c

2.43 (1.98 ~ 2.99)^c

2.78 (2.24 ~ 3.44)^c

2.89 (2.29 ~ 3.64)^c

2.84 (2.29 ~ 3.51)^c

 Often/Always

1.26 (1.09 ~ 1.46)^b

1.31 (1.13 ~ 1.53)^c

1.47 (1.25 ~ 1.74)^c

1.76 (1.49 ~ 2.07)^c

1.30 (1.03 ~ 1.64)^a

1.44 (1.20 ~ 1.74)^c

1.22 (1.00 ~ 1.49)^a

1.47 (1.19 ~ 1.81)^c

1.59 (1.33 ~ 1.91)^c

 Often/Always

2.02 (1.80 ~ 2.26)^c

2.01 (1.78 ~ 2.27)^c

1.67 (1.45 ~ 1.92)^c

1.64 (1.42 ~ 1.90)^c

1.40 (1.19 ~ 1.64)^c

0.80 (0.68 ~ 0.95)^a

0.72 (0.59 ~ 0.87)^c

0.40 (0.33 ~ 0.47)^c

 Often/Always

1.37 (1.14 ~ 1.65)^b

1.26 (1.03 ~ 1.54)^a

1.34 (1.04 ~ 1.71)^a

1.28 (1.00 ~ 1.63)^a

1.36 (1.02 ~ 1.82)^a

1.69 (1.22 ~ 2.33)^c

1.52 (1.15 ~ 2.02)^b

 Often/Always

0.88 (0.78 ~ 0.99)^a

vibration

 Often/Always

1.45 (1.13 ~ 1.86)^b

1.89 (1.40 ~ 2.55)^c

1.48 (1.14 ~ 1.94)^b

 Often/Always

1.22 (1.05 ~ 1.42)^b

1.23 (1.04 ~ 1.45)^a

1.36 (1.15 ~ 1.61)^c

1.62 (1.30 ~ 2.02)^c

1.34 (1.12 ~ 1.61)^b

1.35 (1.12 ~ 1.64)^b

1.35 (1.09 ~ 1.67)^b

1.27 (1.05 ~ 1.53)^a