Table 4 Reported fatigue and its impact on shiftworkers performance. relationships and wellbeing

From: Bridging the gap: examining circadian biology and fatigue alongside work schedules

Variable

“2 x 2 x 4” schedule

“4 x 4 x 4 schedule”

“fixed 12 h” schedule

p

Valid n

Mean/n

SD/%

Valid n

Mean/n

SD/%

Valid n

Mean/n

SD/%

Reported fatigue negative impact on…

… performance at work

0.085

 Never

16

3

19

14

4

29

11

2

18

 Rarely

16

6

38

14

7

50

11

4

36

 Sometimes

16

5

31

14

3

21

11

4

36

 Frequently

16

2

13

14

0

0

11

1

9

… learning new tasks

0.009

 Never

17

6

35

15

13

87

11

3

27

 Rarely

17

8

47

15

0

0

11

5

46

 Sometimes

17

3

18

15

2

13

11

3

27

 Frequently

17

0

0

15

0

0

11

0

0

… their overall employee satisfaction

0.009

 Never

17

5

29

15

14

93

11

4

36

 Rarely

17

5

29

15

1

7

11

2

18

 Sometimes

17

6

35

15

0

0

11

3

27

 Frequently

17

1

6

15

0

0

11

2

18

… their co-workers safety

0.332

 Never

17

5

29

15

14

93

11

4

36

 Rarely

17

5

29

15

1

7

11

2

18

 Sometimes

17

6

35

15

0

0

11

3

27

 Frequently

17

0

0

15

0

0

11

0

0

… their own safety

0.314

 Never

17

13

77

15

14

93

11

8

73

 Rarely

17

4

24

15

1

7

11

2

18

 Sometimes

17

0

0

15

0

0

11

1

9

 Frequently

17

0

0

15

0

0

11

0

0

… the relationship with co-workers

0.017

 Never

17

13

77

15

14

93

11

8

73

 Rarely

17

4

24

15

1

7

11

2

18

 Sometimes

17

0

0

15

0

0

11

1

9

 Frequently

17

0

0

15

0

0

11

0

0

Reported level of alertness to carry out their work task in the …

… middle of the day

0.169

 Not at all rested and alert

17

0

0

15

0

0

11

1

9

 Poorly rested and alert

17

1

6

15

0

0

11

1

9

 Somewhat rested and alert

17

5

29

15

1

7

11

3

27

 Fairly rested and alert

17

6

35

15

5

33

11

5

46

 Very rested and alert

17

5

29

15

9

60

11

1

9

… middle of the night

0.028

 Not at all rested and alert

17

0

0

15

0

0

N/A

N/A

N/A

 Poorly rested and alert

17

5

29

15

0

0

N/A

N/A

N/A

 Somewhat rested and alert

17

5

29

15

2

13

N/A

N/A

N/A

 Fairly rested and alert

17

5

29

15

6

40

N/A

N/A

N/A

 Very rested and alert

17

2

12

15

7

47

N/A

N/A

N/A

Significant tiredness (# days)

13

6

6

14

2 (1)

3

10

8

8

0.022

Anxiety (BAI score)

17

2.7

3.7

15

1.7

2.4

11

4.6

3.6

0.095

Depression (BDI II score)

17

4.4

3.8

15

0.9 (2)

2.1

11

5.8

5.4

0.005

  1. Shown are mean (SD) or n (%). Differences were assessed through one-way ANOVA followed by Tukey post-hoc test for numerical variables or chi-square test for categorical ones. (1) Different from “fixed 12 h”; (2) Different from the others.
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