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Table 2 Overview of study outcome measures

From: Dismantling the relative effectiveness of core components of cognitive behavioural therapy in preventing depression in adolescents: protocol of a cluster randomized microtrial

Type of variable Domain/Concept Instrument Items Source Assessment
A P T t 0 t1-t3 t 4 t 5
Primary outcome Depressive symptoms CDI-2 (FV) CDI-2 (SV) 28 12 x x    x x x x
Secondary outcome Depressive symptoms NRS for core symptoms of depression a 3 x    x x x x
   CDI-2 parent version 17   x   x   x x
  Depression diagnosis K-SADS affective disorders   x x   x   x x
  Top three problems TP measurea 3 x    x x x x
  Suicidal ideation (if score 2 on item 8 CDI-2) VOZZ suicide items 8 x    x x x x
  Health-related quality of life EQ-5D-Y 6 x x   x   x x
Cost-effectiveness Healthcare costs Cost diary 21   x   x   x x
Moderators Depression severity K-SADS   x x   x   x x
  Comorbidity BPM 19 x x   x   x x
  Demographics adolescent/parent/therapist    x x x x    
Mediators Negative cognitive errors CNCEQ-R (FV) CNCEQ-R (SV) 16 5 x x    x x x x
  Behavioural activation BADS (FV) BADS (SV) 25 9 x x    x x x x
  Problem solving skills SPSI-R 10 x    x x x x
  Relaxation PSS-10 10 x    x x x x
   NRS for relaxation 1 x    x x x x
Treatment characteristics Current and previous treatment VEHI 6 x    x    x
  Expectancy of treatment PETS 7 x    x    
  Therapeutic alliance TASC-r 12 x   x   x x  
  Groups cohesion GCQ-s 12 x     x x  
  Cooperation with treatment CWT 5    x   x x  
  Satisfaction treatment SSS 3 x      x  
  1. Abbreviations: A Adolescent, FV Full-length version, NRS Numerical Rating Scale, P Parents, SV Short version, T Therapist, t0 Baseline assessment, t1–3 Intermediate assessments, t4 Post-assessment, t5 6-month follow-up assessment.
  2. aThese questionnaires will also be administered prior to each session