Table 1 Demographic characteristics of the participants

Gender

Women

135 (96.4)

19.22 ± 6.30

t = 1.41

P = .159

33.37 ± 11.81

t = −0.353

P = .725

Men

5 (3.6)

15.20 ± 3.56

35.60 ± 0.54

Marital status

Married

109 (77.9)

19.01 ± 6.11

t = .245

P = .807

32.07 ± 11.45

t = 3.39

P = .001

Unmarried

31 (22.1)

19.32 ± 6.86

39.81 ± 10.15

Educational level

Bachelor

105 (75)

18.76 ± 6.32

F = 1.98

P = .141

33.57 ± 12.14

F = .116

P = .89

Master’s

30 (21.4)

19.30 ± 5.63

34.70 ± 10.37

PhD

5 (3.6)

24.40 ± 7.40

33.20 ± 7.36

Shift type

Rotation shift

114 (81.4)

19.55 ± 5.89

t = −1.89

P = .06

35.01 ± 11.02

t = − 2.61

P = .01

Fixed Shift

26 (18.6)

17 ± 7.44

28.54 ± 12.75

Number of night shifts

0

20 (14.3)

19.15 ± 5.77

F = 1.31

P = .192

32.40 ± 15.77

F = 1.15

P = .315

1-3

8 (5.7)

18.25 ± 7.25

33.17 ± 14.78

4-6

39 (27.9)

17.94 ± 7.07

33.23 ± 10.37

7-9

41 (29.3)

19.10 ± 6.10

32.95 ± 1.47

> 10

32 (22.9)

21.08 ± 4.40

34.96 ± 9.75

Second Job

Yes

10 (7.1)

18.90 ± 6.29

t = −.093

P = .926

35.89 ± 1.05

t = .558

P = .578

No

130 (92.9)

19.09 ± 6.28

33.65 ± 11.98

Sleep Disorder

Yes

40 (28.6)

19.23 ± 6.16

t = −.174

P = .862

34.15 ± 12.26

t = .225

P = .823

No

100 (71.4)

19.02 ± 6.32

33.66 ± 11.39

Ventilator training experience

Yes

98 (70)

18.21 ± 6.70

t = −2.54

P = .012

32.85 ± 11.46

t = −1.47

P = .142

No

42 (30)

21.10 ± 4.53

36 ± 11.74