Table 3.
Primary and Secondary Outcomes by Treatment Group
| Primary Outcomes | Pretreatment | End of Treatment | 4-Month Follow-up | |||
|---|---|---|---|---|---|---|
|
| ||||||
| ICAT (n = 40) | CBT-E (n = 40) | ICAT (n = 40) | CBT-E (n = 40) | ICAT (n = 40) | CBT-E (n = 40) | |
| OBE episodes (mean, SD) | 23.2 (19.6) | 22.4 (21.0) | 6.1 (14.8) | 5.3 (9.1) | 5.6 (9.2) | 8.5 (13.7) |
|
|
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| % reduction in OBE (%) | 73.7% | 76.3% | 75.9% | 62.1% | ||
|
|
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| Purging episodes (mean, SD) | 30.6 (27.0) | 30.5 (32.6) | 8.3 (20.8) | 7.4 (11.5) | 8.6 (15.9) | 10.1 (16.3) |
|
|
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| % reduction in purging (%) | 72.9% | 75.7% | 71.9% | 66.9% | ||
|
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| EDE Global (mean, SD) | 3.3 (1.1) | 3.2 (1.1) | 1.7 (0.9) | 1.8 (0.9) | 1.6 (1.1) | 1.8 (1.0) |
| Binge-Purge Abstinence (n, %) | 1 (2.5%) | 0 (0.0%) | 15 (37.5%) | 9 (22.5%) | 13 (32.5%) | 9 (22.5%) |
| Global EDE within 1 SD of community mean (n, %) | 3 (7.5%) | 6 (15.0%) | 19 (47.5%) | 15 (37.5%) | 22 (55.0%) | 20 (50.0%) |
|
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| Hypothesized Mechanisms | ||||||
|
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| Ideal Self-discrepancy (mean, SD) | −0.5 (2.7) | −0.3 (2.4) | −1.7 (2.2) | −1.6 (2.4) | −1.8 (2.2) | −2.1 (1.7) |
| Ought Self-discrepancy (mean, SD) | −0.5 (2.2) | −0.8 (1.7) | −2.1 (1.7) | −1.7 (1.5) | −2.3 (2.0) | −1.7 (1.5) |
| DERS Total (mean, SD) | 100.6 (18.4) | 98.4 (17.6) | 88.9 (13.2) | 90.5 (13.7) | 90.0 (13.8) | 93.0 (13.3) |
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| Secondary Outcomes | ||||||
|
| ||||||
| SBE episodes (mean, SD) | 14.0 (18.7) | 11.5 (13.6) | 3.3 (4.4) | 5.1 (7.8) | 3.0 (6.5) | 4.6 (7.1) |
| EDE Restraint (mean, SD) | 3.0 (1.7) | 2.7 (1.4) | 1.3 (1.3) | 1.2 (1.1) | 1.2 (1.2) | 1.2 (1.2) |
| EDE Eating Concerns (mean, SD) | 2.6 (1.2) | 2.5 (1.4) | 0.9 (0.7) | 1.0 (0.7) | 0.9 (1.0) | 1.1 (1.1) |
| EDE Shape Concerns (mean, SD) | 3.9 (1.2) | 3.9 (1.1) | 2.3 (1.2) | 2.6 (1.2) | 2.1 (1.4) | 2.5 (1.2) |
| EDE Weight Concerns (mean, SD) | 3.8 (1.3) | 3.7 (1.3) | 2.3 (1.1) | 2.4 (1.3) | 2.1 (1.4) | 2.2 (1.3) |
| BDI Total (mean, SD) | 19.5 (11.5) | 17.9 (11.7) | 8.6 (8.0) | 9.3 (9.8) | 10.4 (11.5) | 8.9 (9.3) |
| RSE Total (mean, SD) | 2.8 (1.8) | 3.3 (1.6) | 4.4 (1.8) | 4.3 (1.5) | 3.9 (2.0) | 4.4 (1.4) |
| SSAI Total (mean, SD) | 46.9 (13.3) | 45.1 (12.5) | 35.3 (12.5) | 35.2 (10.1) | 35.9 (13.7) | 37.5 (10.8) |
| STAI Total (mean, SD) | 52.4 (13.6) | 50.9 (11.3) | 38.2 (13.2) | 39.5 (10.0) | 39.5 (14.2) | 41.5 (11.4) |
Abbreviations: ICAT = Integrative Cognitive-Affective Therapy; CBT-E = Cognitive-Behavioral Therapy-Enhanced; OBE = objective binge eating; EDE = Eating Disorder Examination; Ideal and Ought Self-discrepancy = Ideal Self-Discrepancy and Ought Self-Discrepancy from the Selves Interview; DERS = Difficulties in Emotion Regulation Scale; SBE = subjective binge eating; BDI = Beck Depression Inventory; RSE = Rosenberg Self-Esteem; SSAI = Spielberger State Anxiety Inventory; STAI = Spielberger Trait Anxiety Scale.