Effectiveness, relapse prevention and mechanisms of change of cognitive therapy vs. interpersonal therapy for depression: Study protocol for a randomised controlled trial

Table 1 Overview of instruments per time point in the CT and IPT group*

Instrument	0**	3	7	8-11	12	24
Clinical Outcome measures
Beck Depression Inventory II	•	•	•	•	•	•
Quick Inventory of Depressive symptoms	•				•
Brief Symptom Inventory	•		•		•	•
Diagnostic Interview for Depression		•	•	•	•	•
Beck Hopelessness Scale	•		•
Longitudinal Interval Follow-up Evaluation						•
Process variables
Attributional Style questionnaire	•	•	•		•
Dysfunctional Attitude Scale	•	•	•		•
Inventory of Interpersonal Problems	•	•	•		•	•
Leiden Index of Depression Severity	•	•	•
Ruminative Response Scale NL	•	•	•
Self-Liking and Self-Competence Scale	•	•	•
Single Category Implicit Association Task	•		•
Economic Evaluation measures
Health care use Questionnaire	•	•	•		•	•
Productivity and Disease Questionnaire	•		•		•	•
Work and Social Adjustment Scale	•		•		•	•
Euroqol-6D	•		•		•	•
Rand 36	•		•		•	•
Other measures	•
Genetic information
Working Alliance Inventory		•
Collaborative Study Psychotherapy Rating Scale	•	•	•***
Working Alliance Inventory-short observer version	•	•	•***

* Patients in the waiting list condition will receive the same baseline assessment, they will have a second baseline assessment at 2 months follow-up, and their 9, 14, and 26 month follow-up assessments parallel respectively the 7, 12, and 24 month assessments of the CT and IPT group. ** The following general predictors will be administered at baseline as well: demographic variables, family anamnesis, childhood experiences, life-events, reliability and expectations. *** During the treatment phase, all sessions will be videotaped. Only a random selection of tapes will be rated.

ISSN: 1745-6215