Table 5 Direct and indirect effects analysis

Model Summary (path A)

0.6534

0.2789

18.8105

15.413

1

108

0.0002

Model Summary (path B)

0.6506

0.4232

18.1763

7.4987

2

107

0.0009

Model Summary (path C)

0.6436

0.4142

14.4584

18.108

1

108

0.0002

Model 1(path A)

coeff

se

t

p

LLCI

ULCI

 Constant

35.45

4.11

8.61

0.001

27.29

43.6

 Night shift stress

0.38

0.09

3.92

0.002

0.19

0.58

Model 2(path B)

 Constant

29.6313

5.2529

5.641

0.001

19.218

40.045

 Night shift stress

0.3384

0.1032

3.2781

0.0014

0.1338

0.5431

 Sleep disturbances

0.0729

0.0946

0.7703

0.0428

-0.115

0.2604

Model 3(path c)

 Constant

32.2144

4.0356

7.9825

0.001

24.22

40.21

 Night shift stress

0.3665

0.0964

3.8024

2E-04

0.176

0.558

Total effect of X on Y

 Effect

se

t

p

LLCI

ULCI

 0.3665

0.0964

3.8024

0.0002

0.1755

0.5576

Direct effect of X on Y

 Effect

se

t

p

LLCI

ULCI

 0.3384

0.1032

3.2781

0.0014

0.1338

0.5431

Indirect effect(s) of X on Y:

Effect

BootSE

BootLLCI

BootULCI

 Sleep Disturbances

0.0281

0.0422

-0.0466

0.1194