Table 3.
Changes in psychological test scores from pre- and post–internet-based cognitive behavioral therapy.
| Test name and assessment time point | n | Mean (SD) | Cohen d (n=5) | 95% CI | P value | ||
| EDE-Qa |
|
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||
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Global score | — | — | –0.48 | –1.158 to 0.204 | .35 | |
|
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|
Assessment | 7 | 3.2 (1.7) | —b | — | — |
|
|
|
Week 1 | 7 | 2.2 (1.3) | — | — | — |
|
|
|
Week 8 | 6 | 1.8 (1.3) | — | — | — |
|
|
|
Week 16 | 5 | 1.3 (1.1) | — | — | — |
|
|
Restraint subscale | — | — | –0.33 | –1.401 to 0.741 | .50 | |
|
|
|
Assessment | 7 | 3.1 (1.9) | — | — | — |
|
|
|
Week 1 | 7 | 2.3 (1.9) | — | — | — |
|
|
|
Week 8 | 6 | 1.6 (1.4) | — | — | — |
|
|
|
Week 16 | 5 | 1.4 (0.9) | — | — | — |
|
|
Eating concern subscale | — | — | –1.07 | –1.957 to –0.179 | .08 | |
|
|
|
Assessment | 7 | 3.3 (1.8) | — | — | — |
|
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|
Week 1 | 7 | 1.9 (1.7) | — | — | — |
|
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|
Week 8 | 6 | 1.2 (1.4) | — | — | — |
|
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|
Week 16 | 5 | 0.7 (0.2) | — | — | — |
|
|
Shape concern subscale | — | — | 0.01 | –0.273 to 0.297 | .98 | |
|
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|
Assessment | 7 | 3.4 (1.9) | — | — | — |
|
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|
Week 1 | 7 | 2.5 (2.0) | — | — | — |
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|
Week 8 | 6 | 2.3 (2.0) | — | — | — |
|
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Week 16 | 5 | 1.6 (1.8) | — | — | — |
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|
Weight concern subscale | — | — | 0.26 | 0.044 to 0.484 | .59 | |
|
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Assessment | 7 | 3.0 (2.0) | — | — | — |
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Week 1 | 7 | 2.2 (2.0) | — | — | — |
|
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Week 8 | 6 | 2.0 (1.6) | — | — | — |
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Week 16 | 5 | 1.5 (1.9) | — | — | — |
| BITEc |
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||
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Severity | — | — | –1.04 | –2.349 to 0.262 | .08 | |
|
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Assessment | 7 | 9.6 (2.8) | — | — | — |
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Week 1 | 7 | 8.0 (4.0) | — | — | — |
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Week 8 | 6 | 7.8 (7.7) | — | — | — |
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|
Week 16 | 5 | 4.6 (3.4) | — | — | — |
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|
Symptoms | — | — | –1.08 | –2.069 to –0.087 | .07 | |
|
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Assessment | 7 | 21.4 (4.1) | — | — | — |
|
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Week 1 | 7 | 17.0 (3.9) | — | — | — |
|
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|
Week 8 | 6 | 13.5 (4.6) | — | — | — |
|
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|
Week 16 | 5 | 12.0 (6.6) | — | — | — |
| BMI | — | — | 0.40 | 0.096 to 0.708 | .42 | ||
|
|
Assessment | 7 | 23.5 (6.8) | — | — | — | |
|
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Week 1 | 7 | 22.8 (6.0) | — | — | — | |
|
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Week 8 | 6 | 22.4 (6.2) | — | — | — | |
|
|
Week 16 | 5 | 23.1 (6.9) | — | — | — | |
| PHQ-9d | — | — | –0.35 | –1.278 to 0.576 | .48 | ||
|
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Assessment | 7 | 14.0 (6.5) | — | — | — | |
|
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Week 1 | 7 | 9.3 (3.8) | — | — | — | |
|
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Week 8 | 6 | 8.2 (2.7) | — | — | — | |
|
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Week 16 | 5 | 8.4 (4.8) | — | — | — | |
| GAD-7e | — | — | –0.52 | –1.586 to 0.550 | .31 | ||
|
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Assessment | 7 | 11.1 (5.7) | — | — | — | |
|
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Week 1 | 7 | 7.6 (5.1) | — | — | — | |
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Week 8 | 6 | 8.3 (5.6) | — | — | — | |
|
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Week 16 | 5 | 5.8 (1.5) | — | — | — | |
| EQ-5Df | — | — | 0.46 | –0.660 to 1.577 | .36 | ||
|
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Assessment | 7 | 0.7 (0.1) | — | — | — | |
|
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Week 1 | 7 | 0.7 (0.2) | — | — | — | |
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Week 8 | 6 | 0.8 (0.2) | — | — | — | |
|
|
Week 16 | 5 | 0.7 (0.1) | — | — | — | |
| WAI-SFg | — | — | 0.13 | –0.852 to 1.118 | .78 | ||
|
|
Assessment | 7 | — | — | — | — | |
|
|
Week 1 | 7 | 65.6 (8.4) | — | — | — | |
|
|
Week 8 | 6 | 63.7 (10.5) | — | — | — | |
|
|
Week 16 | 5 | 66.0 (4.4) | — | — | — | |
| Motivational ruler | — | — | 0.00 | –0.684 to 0.684 | >.99 | ||
|
|
Assessment | 7 | 15.4 (3.6) | — | — | — | |
|
|
Week 1 | 7 | 16.4 (3.5) | — | — | — | |
|
|
Week 8 | 6 | 18.3 (1.9) | — | — | — | |
|
|
Week 16 | 5 | 16.0 (2.7) | — | — | — | |
aEDE-Q: Eating Disorder Examination Questionnaire.
bNot applicable.
cBITE: Bulimic Investigatory Test, Edinburgh.
dPHQ-9: 9-item Patient Health Questionnaire.
eGAD-7: 7-item Generalized Anxiety Disorder scale.
fEQ-5D: EurolQol–5 Dimension.
gWAI-SF: Working Alliance Inventory-Short Form.