Table 4

Subjective sleep measures; Mean (SD), Change values and Effect Sizes

Pre

Post

Fu3

Change Pre to Post

Change Pre to Fu3

Mean (SD)

Mean (SD)

Mean (SD)

Mean (95% CI)

Effect size (d)a

Mean (95% CI)

Effect size (d)


Insomnia Severity Index

Bibliotherapy with support (n = 44)

17.5 (3.5)

7.6 (4.5)

8.4 (5.1)

-9.9 (-11.3 to -8.5)

-2.46

-9.1 (-10.7 to -7.5)

-2.08

Bibliotherapy (n = 45)

16.6 (3.8)

11.2 (4.2)

10.4 (4.8)

-5.3 (-6.6 to -4.0)

-1.35

-6.2 (-7.5 to -4.8)

-1.43

Waiting list control group (n = 44)

16.7 (3.7)

15.6 (4.7)

14.2 (4.7)

-1.1 (-2.2 to 0.0)

-0.26

-2.5 (-3.5 to -1.5)

-0.59

Sleep Related Behaviours Questionnaire

Bibliotherapy with support (n = 44)

83.6 (14.5)

57.8 (16.4)

58.5 (16.0)

-25.8 (-30.4 to -21.2)

-1.67

-25.1 (-29.8 to -20.8)

-1.64

Bibliotherapy (n = 45)

77.1 (12.8)

66.6 (16.0)

61.5 (17.5)

-10.5 (-14.1 to -6.9)

-0.72

-15.6 (-20.5 to -10.7)

-1.02

Waiting list control group (n = 44)

83.4 (12.8)

79.5 (13.8)

76.9 (13.6)

-3.9 (-6.9 to -0.9)

-0.29

-6.5 (-9.4 to -3.5)

-0.49

Dysfunctional Beliefs and Attitudes about Sleep

Bibliotherapy with support (n = 44)

125.2 (31.3)

58.0 (30.8)

-*

-67.2 (-77.0 to -57.4)

-2.17

- *

- *

Bibliotherapy (n = 45)

116.0 (31.8)

85.8 (37.0)

-

-30.1 (-41.4 to -18.9)

-0.88

-

-

Waiting list control group (n = 44)

133.5 (31.1)

122.7 (30.7)

-

-10.8 (-16.2 to -5.4)

-0.35

-

-

Bed Time Stress b

Bibliotherapy with support (n = 44)

1.5 (1.1)

0.49 (0.74)

0.55 (0.88)

-1.03 (-1.34 to -0.72)

-1.08

-0.97 (-1.29 to -0.64)

-0.95

Bibliotherapy (n = 45)

0.80 (0.92)

0.68 (0.85)

0.52 (0.74)

-0.12 (-0.34 to 0.10)

-0.14

-0.28 (-0.51 to -0.06)

-0.36

Waiting list control group (n = 43)

1.2 (1.1)

1.1 (1.1)

1.1 (1.1)

-0.05 (-0.33 to 0.22)

-0.09

-0.08 (-0.33 to 0.16)

-0.09

Sleep Quality c

Bibliotherapy with support (n = 44)

2.6 (0.66)

3.6 (0.65)

3.5 (0.71)

1.0 (0.75 to 1.2)

1.53

0.93 (0.68 to 1.2)

1.31

Bibliotherapy (n = 45)

2.6 (0.53)

3.1 (0.57)

3.1 (0.65)

0.57 (0.39 to 0.75)

0.91

0.53 (0.32 to 0.75)

0.84

Waiting list control group (n = 43)

2.9 (0.56)

3.0 (0.66)

3.1 (0.61)

0.11 (-0.07 to 0.28)

0.16

0.20 (0.03 to 0.36)

0.34


Abbreviations: Pre, Pre-treatment assessment; Post, Post-treatment assessment; Fu3, 3-month follow-up assessment,

a Effect sizes calculated within groups, pre-post, and pre-fu3, with pooled SDs. (A negative effect size represents a decrease in the measure, a positive effect size an increase.)

b Scored on a scale 0-5, with 0 indicating no stress at all, and 5 indicating very high stress

c Scored on a scale 1-5, with 1 indicating very poor sleep quality, and 5 indicating very good sleep quality

* DBAS-data missing from 3-month follow-up

Jernelöv et al. BMC Psychiatry 2012 12:5   doi:10.1186/1471-244X-12-5

Open Data