Table 3.
Comparison of effect sizes among various clinical trials using the model of Clark and Wells
|
Study group |
Present study |
Clark et al. (2003) |
Stangier et al. (2003) |
Clark et al. (2006) |
Mörtberg et al. (2007) |
Stangier et al. (2011) |
|||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
CBT protocol |
90 min 14 weeks |
75 min 16 weeks |
60 min 15 weeks |
90 min0 14 weeks |
60 min 16 weeks |
50–90 min 20 weeks |
|||||||||||||
| Pre | Post | ES | Pre | Post | ES | Pre | Post | ES | Pre | Post | ES | Pre | Post | ES | Pre | Post | ES | ||
| LSAS |
Mean (SD) |
91.8 (23.5) |
51.7 (27.8) |
1.71 |
78.7 (25.6) |
35.4 (22.9) |
1.69 |
|
|
|
74.8 (24.1) |
28.0 (17.7) |
1.94 |
81.8 (21.1) |
51.3 (27.9) |
1.45 |
69.2 (23.4) |
39.5 (21.1) |
1.27 |
| SPS |
Mean (SD) |
44.1 (18.7) |
26.1 (17.6) |
0.96 |
30.2 (14.8) |
17.4 (13.2) |
0.86 |
30.7 (10.2) |
21.5 (12.6) |
0.90 |
29.3 (13.5) |
9.0 (6.0) |
1.51 |
37.9 (12.5) |
21.5 (13.8) |
1.31 |
|
|
|
| SIAS |
Mean (SD) |
58.7 (12.0) |
37.1 (19.0) |
1.80 |
48.3 (12.3) |
34 (13.9) |
1.17 |
44.9 (10.8) |
36.1 (14.8) |
0.82 |
43.6 (17.8) |
18.2 (10.0) |
1.43 |
51.6 (15.5) |
37.8 (17.7) |
0.89 |
|
|
|
| FNE |
Mean (SD) |
25.2 (4.6) |
16.9 (9.1) |
1.82 |
25.2 (5.2) |
19.5 (8.7) |
1.09 |
|
|
|
23.1 (7.0) |
12.9 (8.9) |
1.46 |
23.3 (4.8) |
18.5 (7.4) |
1.00 |
|
|
|
| FQ | Mean (SD) | 28.5 (8.2) | 16.5 (10.7) | 1.54 | 22.4 (6.4) | 14.2 (7.0) | 1.29 | 22.3 (8.6) | 14.6 (7.6) | 0.9 | |||||||||
Abbreviations: LSAS, Liebowitz Social Anxiety Scale; SPS, Social Phobia Scale; SIAS, Social Interaction Anxiety Scale; FNE, Fear of Negative Evaluation; FQ-SP, Fear Questionnaire – Social Phobia subscale; ES, Effect Size.