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Table 1 Trial registration data

From: New ways to cope with depression—study protocol for a randomized controlled mixed methods trial of bouldering psychotherapy (BPT) and mental model therapy (MMT)

Data category

Information

1. Primary registry and trial identification number’

ISRCTN 12347878

2. Date of registration in primary registry

March 28, 2022

3. Secondary identifying numbers

-

4. Source(s) of monetary or material support

University Hospital Erlangen

5. Primary sponsor

University Hospital Erlangen

6. Secondary sponsor(s)

-

7. Contact for public queries

see Point 8

8. Contact for scientific queries

PD Dr. Katharina Luttenberger, katharina.luttenberger@uk-erlangen.de

9. Public title

New ways to cope with depression

10. Scientific title

New ways to cope with depression—study protocol for a randomized controlled mixed methods trial of bouldering psychotherapy (BPT) and mental model therapy (MMT)

11. Countries of recruitment

Germany

12. Health condition(s) or problem(s) studied

Depression

13. Intervention(s)

Intervention group receiving the bouldering psychotherapy (BPT)

Intervention group receiving the mental model therapy (MMT)

Control group (CG)

14. Key inclusion and exclusion criteria

Inclusion criteria:

1. Depressive episode, assessed via virtual diagnostic screening interview based on the DSM-V diagnostic criteria

2. Informed consent to participate in the study (especially regarding the randomized allocation, anonymous storage of data, and data collection)

3. Ability and availability to come to the therapy locations and time to participate as well as access to digital applications for video or telephone interviews

Exclusion criteria:

1. Age < 18 years

2. Presence of current severe mental illnesses that complicate participation in group therapy (e.g., psychosis, mania, current self-injury, acute substance dependence, current suicidality)

3. Physical contraindication for climbing (physical ailments or pregnancy)

4. Body Mass Index (BMI) < 17.5 or > 40

5. Current treatment confounded with study outcomes (participation in psychotherapeutic group therapy, initiation/change in psychotropic medication within 8 weeks prior to the intervention)

15. Study type

Randomized controlled prospective assessor-blinded longitudinal clinical intervention study

16. Date of first enrollment

Began on March 29, 2022

17. Target sample size

120

18. Recruitment status

Ongoing

19. Primary outcome(s)

Depression measured with the Montgomery Asberg Rating Scale (MADRS) score from a third-party assessment in computer-assisted video interviews

20. Key secondary outcomes

Anxiety, self-efficacy, sense of coherence, locus of control, (mind- and body-based) state mindfulness, physical activity, mechanisms of therapeutic change in group therapy, blood concentration of osteocalcin, sphingolipid parameters, growth factors and inflammatory markers, qualitative factors of influence

BPT specific

Hand strength, core stability, BMI, body fat percentage, muscle percentage

MMT specific

Cognitive processing