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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