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Table 3 Separate pre-post comparisons with effect sizes for the two conditions

From: Sleep better, feel better? Effects of a CBT-I and HT-I sleep training on mental health, quality of life and stress coping in university students: a randomized pilot controlled trial

Variable

N

SWIS

t

p

d

N

WLC

t

p

d

Pre M (SD)

Post M (SD)

Pre M (SD)

Post M (SD)

Mental health

 Depression

28

23.43 (8.74)

20.61 (8.05)

2.367

.025

.32

13

24.92 (7.54)

21.46 (6.94)

2.843

.015

.56

 Somatic complaints

28

7.75 (4.49)

7.04 (3.84)

1.285

.210

 

13

6.15 (3.87)

5.69 (2.02)

.496

.629

 

 Anxiety

28

7.96 (2.47)

7.62 (2.38)

1.104

.280

 

11

7.00 (2.53)

7.45 (1.97)

−.833

.424

 

 General stress

28

7.75 (3.05)

7.50 (3.67)

.500

.621

 

13

6.46 (3.13)

7.23 (4.79)

−.784

.448

 

Stress coping strategies

 Adaptive strategies

27

12.32 (2.20)

12.13 (2.70)

.393

.679

 

13

16.91 (4.08)

16.73 (4.23)

.370

.718

 

 Maladaptive strategies

27

13.50 (3.47)

12.79 (3.51)

1.522

.140

 

13

19.23 (3.94)

16.69 (4.52)

2.449

.031

.48

Quality of life

 Physical condition

28

2.95 (.58)

3.27 (.57)

−2.848

.008

.38

13

2.78 (.89)

2.98 (.66)

−1.099

.294

 

 Cognitive emotional condition

28

2.82 (.58)

2.94 (.56)

−1.246

.223

 

13

2.89 (.66)

2.98 (.59)

−.574

.577

 

 Quality of life

28

3.15 (.56)

3.29 (.55)

−1.487

.149

 

13

3.04 (.53)

3.18 (.56)

−1.067

.307

 
  1. Bold characters indicate significant results (p < .05)