Table 2 Logistic regression model for associated factors with poor work performance

 Age

0.98 (0.98–0.99)^**

0.98 (0.98–0.99)^**

0.99 (0.99–1.00)^*

0.99 (0.99–1.00)^*

  Male

1.0

1.0

1.0

1.0

  Female

0.48 (0.33–0.70)^**

0.43 (0.29–0.63)^**

1.25 (1.13–1.38)^**

1.10 (0.99–1.23)

  No

1.0

1.0

1.0

1.0

  Yes

1.29 (1.17–1.43)^**

1.23 (1.11–1.37)^**

1.13 (1.02–1.24)^*

1.06 (0.96–1.17)

  Daytime worker

1.0

1.0

1.0

1.0

  Shift worker

1.39 (1.21–1.60)^**

1.40 (1.20–1.64)^**

0.99 (0.87–1.13)

1.92 (1.00–3.80)

  40-60 h

1.0

1.0

1.0

1.0

  < 40 h

0.98 (0.84–1.14)

1.05 (0.89–1.23)

1.30 (1.19–1.43)^**

1.31 (1.18–1.45)^**

  ≥ 60 h

1.39 (1.24–1.55)^**

1.24 (1.10–1.41)

1.48 (1.26–1.74)^**

1.40 (1.17–1.67)^**

  Good/average

1.0

1.0

1.0

1.0

  Poor

2.89 (2.47–3.40)^**

2.06 (1.73–2.47)^**

2.52 (2.23–2.84)^**

1.73 (1.52–1.98)^**

  Good/average

1.0

1.0

1.0

1.0

  Poor

2.84 (2.42–3.34)^**

1.82 (1.52–2.19)^**

3.18 (2.78–3.64)^**

2.23 (1.93–2.59)^**

  7-8 h

1.0

1.0

1.0

1.0

  < 7 h

1.01 (0.91–1.13)

0.91 (0.81–1.02)

1.00 (0.91–1.10)

0.95 (0.86–1.05)

  ≥ 8 h

1.33 (1.11–1.60)^*

1.41 (1.17–1.71)^**

1.30 (1.09–1.55)^*

1.26 (1.05–1.51)^*

  Without DIS

1.0

1.0

1.0

1.0

  Presence of DIS

1.74 (1.45–2.09)^**

1.26 (1.04–1.53)^*

1.80 (1.56–2.07)^**

1.33 (1.14–1.55)^**

  Without DMS

1.0

1.0

1.0

1.0

  Presence of DMS

1.66 (1.46–1.90)^**

1.28 (1.11–1.48)^*

1.62 (1.46–1.79)^**

1.24 (1.11–1.39)^**

  Without EMA

1.0

1.0

1.0

1.0

  Presence of EMA

1.56 (1.35–1.80)^**

1.23 (1.05–1.44)^*

1.67 (1.49–1.87)^**

1.34 (1.19–1.52)^**

p = 0.706

p = 0.350