Skip to main content
. 2015 Jun 18;17(6):e152. doi: 10.2196/jmir.3946

Table 2.

Treatment outcomes for all participants and for the individual subgroups BN, BED, and EDNOS.


 Web-based CBT (n=108) WL (n=106) Interaction effect of group x timea
Baseline Posttest P d Baseline Posttest P d F df P d
All participants (n=214)

Eating disorder psychopathology b 3.5 (0.9) 2.6 (1.2) <.001 .82 3.5 (1.0) 3.0 (1.1) <.001 .43 9.42 201 .002 .44


Restraint 2.7 (1.3) 2.2 (1.4) <.001 .39 2.5 (1.4) 2.1 (1.4) .046 .23 0.90 206 .34 .15


Eating concern 2.8 (1.2) 1.7 (1.3) <.001 .83 3.0 (1.4) 2.4 (1.5) <.001 .40 6.65 205 .01 .35


Shape concern 4.4 (1.1) 3.4 (1.5) <.001 .72 4.4 (1.1) 3.9 (1.3) <.001 .38 7.87 200 .006 .43


Weight concern 4.0 (1.1) 3.1 (1.4) <.001 .73 4.1 (1.0) 3.7 (1.2) <.001 .36 11.13 200 .001 .48

Body dissatisfactionc 58.4 (14.9) 50.5 (17.6) <.001 .49 60.3 (14.8) 58.6 (15.3) .05 .11 13.16 201 <.001 .42

Body Mass Index


<18.5 17.2 (0.3) 17.2 (0.6) .93 .03 17.9 (-) 17.9 (-) - - <0.01 4 .98 .04


18.5 – 25 22.4 (1.7) 23.2 (1.2) .09 .58 22.0 (1.7) 22.3 (2.5) .56 .10 1.43 23 .24 .38


>25 33.5 (5.7) 33.3 (5.6) .23 .04 34.0 (5.4) 34.0 (5.3) .93 .00 0.94 169 .33 .04

Physical health d 22.8 (12.7) 18.1 (12.7) <.001 .37 25.7 (11.8) 24.3 (12.2) .045 .11 12.55 200 <.001 .28


MAP-HSS 11.7 (6.5) 9.5 (6.4) <.001 .34 13.0 (5.9) 12.2 (5.9) .046 .13 6.94 202 .009 .23

Mental health e 31.7 (18.6) 23.6 (18.5) <.001 .43 34.6 (20.2) 31.2 (20.7) .03 .17 4.88 203 .03 .24


Depression 11.2 (8.4) 7.5 (7.5) <.001 .46 11.7 (8.5) 10.2 (8.6) .06 .17 4.37 204 .04 .26


Anxiety 5.5 (5.8) 4.7 (5.4) .06 .16 6.5 (7.0) 6.4 (6.4) .84 .02 1.09 206 .30 .12


Stress 15.0 (8.5) 11.3 (8.4) <.001 .43 16.4 (8.6) 14.6 (9.0) .009 .20 3.55 203 .06 .22

Self-esteemf 16.2 (7.1) 18.6 (6.8) <.001 .34 17.3 (7.2) 18.3 (6.9) .01 .14 5.06 202 .03 .20

Quality of lifeg 62.8 (17.2) 69.2 (15.8) <.001 .39 61.2 (17.1) 65.4 (15.0) .03 .27 0.85 206 .36 .13

Social functioningh 6.8 (5.0) 5.2 (4.3) <.001 .35 6.5 (4.7) 6.3 (4.3) .50 .05 7.93 205 .005 .29
BN subgroup (n=44)

Eating disorder psychopathology b 3.9 (1.0) 2.9. (1.1) .003 .94 4.2 (0.8) 3.7 (1.1) .02 .55 1.92 41 .17 .55


Restraint 3.3 (1.3) 2.6 (1.2) .01 .64 3.7 (1.0) 3.4 (1.2) .43 .27 1.11 42 .30 .44


Eating concern 3.3 (1.1) 1.9 (1.1) <.001 1.30 3.7 (1.1) 3.0 (1.5) .04 .53 2.59 41 .12 .65


Shape concern 4.7 (1.2) 3.8 (1.5) .02 .67 4.9 (1.0) 4.4 (1.3) .02 .49 0.74 41 .39 .31


Weight concern 4.4 (1.3) 3.5 (1.6) .03 .62 4.7 (1.2) 4.2 (1.2) .02 .43 0.86 41 .36 .32
BED subgroup (n=85)

Eating disorder psychopathology b 3.5 (0.8) 2.6 (1.3) <.001 .87 3.7 (0.7) 3.2 (0.9) .002 .60 4.25 78 .04 .61


Restraint 2.5 (1.4) 1.9 (1.5) .005 .42 2.3 (1.3) 2.0 (1.3) .31 .23 0.60 80 .44 .22


Eating concern 3.1 (1.2) 2.0 (1.4) <.001 .86 3.4 (1.1) 2.7 (1.4) .001 .61 1.36 80 .25 .31


Shape concern 4.5 (1.0) 3.5 (1.6) <.001 .76 4.7 (0.8) 4.2 (1.1) .004 .52 4.13 77 .046 .60


Weight concern 4.1 (0.9) 3.1 (1.4) <.001 .83 4.3 (0.8) 3.9 (0.9) .02 .39 6.67 78 .01 .77
EDNOS subgroup (n=85)

Eating disorder psychopathology b 3.2 (0.8) 2.5 (1.1) <.001 .76 2.9 (0.9) 2.5 (1.0) .002 .39 3.31 78 .07 .38


Restraint 2.6 (1.2) 2.3 (1.3) .16 .26 2.0 (1.3) 1.7 (1.2) .11 .28 0.02 80 .90 .03


Eating concern 2.2 (1.1) 1.4 (1.2) <.001 .70 2.2 (1.5) 1.8 (1.4) .04 .25 3.41 79 .07 .35


Shape concern 4.1 (1.0) 3.2 (1.4) <.001 .72 3.8 (1.1) 3.4 (1.4) .02 .32 3.27 78 .07 .44


Weight concern 3.8 (1.1) 3.0 (1.3) <.001 .73 3.6 (1.0) 3.2 (1.2) .005 .37 5.01 78 .03 .44

aTreatment outcomes were measured with repeated measures and mixed model analysis. Effect sizes were measured with Cohen’s d.

bEating Disorder Examination-Questionnaire.

cBody Attitude Test.

dTotal score of Maudsley Addiction Profile-Health Symptom Scale (MAP-HSS) and 15 additional eating disorder-specific physical complaints.

eDepression Anxiety Stress Scale.

fRosenberg Self-Esteem Scale.

gEuroQol visual analogue scale.

hMeasurements in the Addictions for Triage and Evaluation – International Classification of Functioning, Disability and Health.