Table 4

Comparison of effect sizes by group CBT

Completers analyses





ITT


Study
 Heimberg (1998)
 Stangier (2003)
 Present study
 Mörtberg (2007)
 Present study
Group
 12 weeks
 15 weeks
 16 weeks
 3 weeks
 16 weeks
N
 36

26

57

35

57

Drop out (%)
 22.2

15.4

12.3

25.7

12.3


Pre
 Post
 ES
 Pre
 Post
 ES
 Pre
 Post
 ES
 Pre
 Post
 ES
 Pre
 Post
 ES

LSAS total
 59.0
 46.2
 0.97


77.2
 58.5
 0.71
 68.1
 52.5
 0.75
 76.2
 59.6
 0.65
SD
 13.2
 8.9



26.1
 27.8
20.9
 19.4
25.6
 27.3
Social fear
 15.1
 12.0
 0.44


20.1
 17.3
 0.41


20.0
 17.5
 0.37
SD
 7.0
 4.9



6.8
 7.2



6.9
 7.2
Social avoidance
 13.1
 9.9
 0.42


18.4
 14.2
 0.53


18.1
 14.3
 0.47
SD
 7.7
 4.8



7.8
 8.5



7.9
 8.5
Performance fear
 17.0
 13.4
 0.65


20.9
 15.9
 0.83


20.8
 16.3
 0.78
SD
 5.6
 3.8



6.1
 7.2



5.8
 6.9
Performance avoidance
 13.8
 10.9
 0.47


17.2
 11.1
 0.80


17.3
 11.5
 0.71
SD
 6.0
 4.3



8.3
 8.0



8.2
 7.9
FQ-spa
 19.0
 14.7
 0.60


24.2
 16.9
 1.19
 20.7
 15.5
 0.78
 24.0
 17.8
 1.01
SD
 7.2
 4.0



6.2
 8.1
6.7
 7.1
6.2
 7.8
SPS
 27.3
 25.8
 0.09
 33.6
 25.5
 0.53
 36.7
 24.0
 0.83
 36.5
 27.7
 0.64
 36.2
 24.7
 0.75
SD
 17.0
 10.0
15.3
 15.3
15.4
 15.3
13.8
 11.5
15.4
 15.2
SIAS
 41.8
 39.4
 0.13
 45.8
 38.4
 0.53
 54.9
 41.8
 0.89
 44.5
 36.7
 0.48
 54.8
 43.0
 0.79
SD
 18.4
 13.2
14.0
 12.4
14.8
 15.6
16.1
 14.7
15.0
 16.0
FNE
 22.3
 21.4
 0.12


24.3
 20.8
 0.68
 22.5
 21.5
 0.15
 24.6
 22.1
 0.49
SD
 7.6
 4.3



5.2
 6.5
6.5
 7.2
5.1
 6.5

FQ-spa: Fear Questionnaire Social Phobia Subscale

Chen et al. BMC Psychiatry 2007 7:69   doi:10.1186/1471-244X-7-69