Table 2

Sleep timing 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)


Sleep Onset Latency, minutes

Bibliotherapy with support (n = 44)

60.3 (41.0)

24.9 (17.0)

33.5 (22.6)

-35.4 (-46.6 to -24.2)

-1.13

-26.8 (-39.0 to -14.5)

-0.81

Bibliotherapy (n = 45)

65.7 (45.1)

45.1 (32.2)

43.0 (28.4)

-20.6 (-30.6 to -10.6)

-0.53

-22.7 (-34.8 to -10.5)

-0.60

Wait-list control (n = 43)

66.9 (42.1)

62.2 (42.4)

62.4 (45.1)

-4.6 (-10.7 to 1.5)

-0.11

-4.5 (-12.0 to 3.0)

-0.10

Wake After Sleep Onset, minutes

Bibliotherapy with support (n = 44)

53.6 (40.4)

17.0 (16.8)

26.8 (29.3)

-36.5 (-47.7 to -25.4)

-1.18

-26.8 (-38.9 to -14.6)

-0.76

Bibliotherapy (n = 45)

47.5 (33.6)

32.0 (27.0)

30.2 (28.7)

-15.6 (-24.6 to -6.5)

-0.51

-17.4 (-26.6 to -8.2)

-0.55

Wait-list control (n = 43)

36.9 (29.5)

30.4 (28.9)

25.3 (25.0)

-6.5 (-12.5 to -0.4)

-0.22

-11.6 (-19.4 to -3.7)

-0.42

Total Sleep Time, hours

Bibliotherapy with support (n = 44)

5.56 (1.44)

6.07 (1.02)

6.52 (0.95)

0.51 (0.20 to 0.83)

0.41

0.97 (0.56 to 1.37)

0.79

Bibliotherapy (n = 45)

5.73 (0.89)

6.22 (1.02)

6.46 (0.96)

0.49 (0.26 to 0.73)

0.51

0.73 (0.46 to 1.00)

0.79

Wait-list control (n = 43)

6.40 (1.09)

6.55 (1.26)

6.74 (1.11)

0.14 (-0.14 to 0.42)

0.13

0.34 (0.09 to 0.59)

0.31

Sleep Efficiency, %

Bibliotherapy with support (n = 44)

67.1 (15.5)

85.4 (6.8)

83.3 (8.3)

18.3 (14.4 to 22.2)

1.53

16.2 (11.7 to 20.6)

1.30

Bibliotherapy (n = 45)

68.3 (11.1)

76.4 (10.9)

78.4 (9.8)

8.1 (5.8 to 10.3)

0.74

10.1 (7.6 to 12.6)

0.96

Wait-list control (n = 43)

71.5 (11.2)

74.5 (11.5)

76.1 (10.5)

3.0 (0.5 to 5.4)

0.27

4.5 (1.8 to 7.2)

0.42


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.)

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

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