Thesis

118 Chapter 5 Table 1: Baseline Demographic and Clinical Characteristics Variable CBT+ (N = 132) DBT-BED (N = 71) p-values (2-sided) Effect Size 95% CI Age (mean, SD) 35.24 (10.68) 37.63 (10.56) ns d = .22 -0.06, 0.51 Female (n, %) 117 (88.6) 66 (93.0) ns Φ = .07 -0.06, 0.20 Dutch nationality (n, %) 128 (97) 70 (98.6) ns Φ = .05 -0.07, 0.17 University education (n, %) 14 (10.6) 2 (2.8) ns Φ = -.14 -0.28, 0.00 Living with partner/spouse (n, %) 68 (51.5) 51 (71.8) .007 Φ = .20 0.07, 0.33 BMI (mean, SD) 41.46 (7.00) 41.59 (6.46) ns d = .02 -0.27, 0.31 Full BED diagnosis (n, %) 112 (84.8) 66 (93.0) ns Φ = .12 -0.01, 0.25 Duration of illness (mean, SD) 15.95 (9.63) 17.21 (12,39) ns d = .12 -0.17, 0.41 OBE episodes (mean, SD) 7.98 (8.46) 6.56 (9.25) ns d = -.16 -0.45, 0.13 EDI-3 Bulimia (mean, SD) 15.12 (6.09) 15.03 (5.84) ns d = -.02 -0.30, 0.27 EDE-Q Global (mean, SD) 3.35 (1.01) 3.41 (.99) ns d = .06 -0.23, 0.35 EDE-Q Restraint (mean, SD) 1.56 (1.35) 1.71 (1.36) ns d = .11 -0.18, 0.40 Overvaluation of shape/weight (mean, SD) 4.94 (1.68) 5.09 (1.39) ns d = .09 -0.19, 0.38 EDE-Q Weight Concern1 (mean, SD) 3.67 (1.24) 3.70 (1.27) ns d = .02 -0.26, 0.31 EDE-Q Shape Concern1 (mean, SD) 4.22 (1.16) 4.25 (1.27) ns d = .03 -0.26, 0.31 DEBQ Emotional Eating (mean, SD) 3.91 (.58) 4.00 (.68) ns d = .15 -0.14, 0.43 SCL-90 Anxiety (mean, SD) 18.17 (6.72) 18.71 (7.39) ns d = .08 -0.21, 0.37 BDI-II Total (mean, SD) 23.08 (11.24) 22.85 (9.70) ns d = -.02 -0.31, 0.27 EDI-3 Low Self-Esteem (mean, SD) 11.95 (5.60) 12.86 (5.18) ns d = .17 -0.12, 0.46 EDI-3 Emotional Dysregulation (mean, SD) 5.83 (4.04) 6.08 (4.12) ns d = .06 -0.23, 0.35 TAS Difficulties Identifying Feelings 19.31 (5.39) 19.18 (5.38) ns d = -.02 -0.31, 0.26 Note: CBT+ = intensive cognitive behavior therapy; DBT-BED = dialectical behavior therapy for binge eating disorder; CI = confidence interval; BMI = body mass index; OBE = objective binge eating; EDI-3 = Eating Disorder Inventory-3rd edition; EDE-Q = Eating Disorder Examination Questionnaire; Overvaluation of weight and shape, based on Kenny & Carter (2018): the average score of the EDE-Q overvaluation of weight and shape items; DEBQ = Dutch Eating Behavior Questionnaire; SCL-90 = Symptom Checklist-90 items; BDI-II = Beck Depression Inventory-2nd edition; TAS = Toronto Alexithymia Scale. 1: The Eating Disorder Examination Questionnaire weight concern and shape concern scale scores were calculated without their respective overvaluation items. If the overvaluation items were to be included, the means of these scales would be as follows: CBT+ 3.93 (SD = 1.19), DBT-BED 3.97 (1.21) (weight concern) and CBT+ 4.31 (SD = 1.16), DBT-BED 4.36 (SD = 1.22) (shape concern). The difference between the two treatment groups is non-significant for both weight concern and shape concern. Generalized Linear Models: Decrease in OBE episodes Table 2 shows tests of prediction (i.e., main effect) and moderation (i.e., interaction) at end-of-treatment and follow-up. Unadjusted significance values are presented in the table; significance after FDR adjustment are indicated with footnotes. Figure 1 shows graphs of significant interactions.

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