Table 3 Multivariate logistic regression for the association between demographic and occupational factors and five types of WPV

Male

1.94(1.55–2.42)

1.31(1.09–1.59)

1.80(1.48–2.19)

1.74(1.39–2.18)

1.97(1.47–2.63)

Shift work

1.60(1.28–2.01)

1.65(1.41–1.92)

1.37(1.13–1.66)

1.48(1.18–1.86)

1.91(1.38–2.65)

 Master’s degree and above

Ref

Ref

Ref

 Associate’s degree and below

1.35(0.92–1.99)

1.25(0.97–1.61)

1.76(1.03–3.00)

 Bachelor’s degree

1.79(1.29–2.48)

1.39(1.12–1.72)

1.88(1.18–3.01)

 Primary

Ref

Ref

Ref

 Tertiary

2.71(1.35–5.53)

2.01(1.39–2.91)

2.75(1.63–4.64)

 Secondary

3.62(1.79–7.31)

2.57(1.76–3.75)

3.25(1.91–5.54)

 Primary

Ref

Ref

 Intermediate

1.19(0.95–1.50)

1.24(1.00–1.53)

 Senior

1.54(1.09–2.16)

2.34(1.71–3.09)

 < 40h

Ref

 40-50h

1.16 (0.99–1.35)

 > 50h

1.64 (1.32–2.05)