JMIR Publications

ABSTRACT

Background:

In face-to-face therapy for eating disorders, the therapeutic alliance (TA) is an important predictor of symptom reduction and treatment completion. Current, however, not much is known about the TA during web-CBT and its associations with symptom reduction, treatment completion and the perspectives of patients versus therapists.

Objective:

The present study aimed to investigate (1) differences between TA-ratings measured at interim and post-treatment, separately for patients and therapists, (2) the degree of agreement between therapists and patients (treatment completers and non-completers) for TA-ratings, and (3) associations between patient and therapist TA-ratings and both eating disorder pathology and treatment completion.

Methods:

A secondary analysis was performed on the RCT data of a web-CBT intervention for eating disorders. TA-ratings (HAQ) were measured at interim and post-treatment, focusing on treatment completers, non-completers and therapists. Paired t-tests were conducted to assess the change from interim to post-treatment. Intraclass correlations were calculated to determine cross-informant agreement with regards to HAQ-scores between patients and therapists. Through two stepwise regressive procedures (at interim and post-treatment), it was examined which HAQ-scores predicted (1) eating disorder pathology and (2) therapy completion.

Results:

Participants were 170 females with BN (n=33), BED (n=68), or EDNOS (n=69); mean age 39.6 (SD=11.5) years. For completers, HAQ-total scores and HAQ-Helpfulness scores improved significantly from interim to post-treatment. For non-completers, all HAQ-scores decreased significantly. For all HAQ-scales, agreement between patients and therapists was poor. However, agreement was slightly better post-treatment than at interim. The helpfulness subscale of the HAQ was negatively associated with eating disorder psychopathology at interim and post-treatment. A positive association was found between HAQ-total patient scores at interim and treatment completion. Lastly, post-treatment HAQ-total patient scores and post-treatment HAQ-Helpfulness scores of therapists were positively associated with treatment completion.

Conclusions:

The results showed that for web-CBT for eating disorders, in particular the confidence to improve one’s situation (HAQ-Helpfulness) is important for predicting eating disorder pathology and treatment completion. Furthermore, in the current web-CBT, the TA increased for completers and decreased for non-completers, according to both patients and therapists.