Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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COMPLETED
NA
122 participants
INTERVENTIONAL
2018-02-27
2019-05-31
Brief Summary
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Participants attending a CFT-incorporated Pain Management Programme will complete a battery of questionnaires at the start of the group (week 1), in the middle of the group (week 5) and at the end of the group (week 11).
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Detailed Description
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Principle Research Question: Do self-compassion and psychological flexibility mediate change (anxiety/depression/well-being) in a Compassion-Focused Therapy group for adults with chronic pain?
Primary Outcome Measure: Strength of mediation effects
Sample Size:
\[Reference 1\] propose guidelines for recommended sample sizes in order to detect mediation effects with .8 power. These guidelines are informed by existing literature in the field. There is less robust research on self-compassion and chronic pain, therefore, this calculation is based on research in psychological flexibility and chronic pain.
\[Reference 2\] conducted correlational analyses on the processes of psychological flexibility following a group intervention based on ACT. These processes included acceptance of pain, mindfulness, psychological acceptance and values-based action (r values between 0.33 and 0.55). These positive correlations indicate that the group intervention was related to higher levels of psychological flexibility.
\[Reference 3\]'s review identified several studies that reported correlational effect sizes between acceptance, and depression/anxiety/daily functioning related to chronic pain (r = -0.58/-0.66/0.47 respectively). These negative correlations illustrate that higher levels of psychological flexibility were related to better outcomes.
Based on these correlational effect sizes, guidelines in \[Reference 1\] suggest that a sample size of 53-71 is required.
Analysis:
The analysis will focus on the proposed mediating factors (self-compassion and psychological flexibility) and how they explain the outcome of the CFT-incorporated group intervention. In order to study the processes of change, this study will measure change in mediators and outcomes over the course of the group.
In a mediation model, the effect of the independent variable (IV; CFT group) on a dependent variable (DV; outcome/change in symptoms) is conveyed through a third mediating variable. In order to be a mediator, a variable must change during the intervention, be associated with the intervention, and have an impact on the outcome.
In this study, it is hypothesised that self-compassion and/or psychological flexibility are the mediating variables that explain the influence of the group intervention on eventual outcome, i.e. the overall change in symptoms at the end of the group. Linear regression and nonparametric bias-corrected bootstrap, which corrects for skew in the data, will be applied to the data using SPSS, using the PROCESS macro. An effect of mediation will be indicated if the confidence interval does not contain zero.
Missing data will be handled using either the maximum likelihood or multiple imputation method, as recommended in literature.
Conditions
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Study Design
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NA
SINGLE_GROUP
HEALTH_SERVICES_RESEARCH
NONE
Study Groups
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Compassion-Focused Therapy
Compassion-Focused Therapy 11 weeks of Compassion-Focused Therapy \[based on "Compassion-Focused Therapy for Dummies" (Welford, 2016)\]
Compassion-Focused Therapy
Compassion-Focused Therapy 11 weeks of Compassion-Focused Therapy \[based on "Compassion-Focused Therapy for Dummies" (Welford, 2016)\]
Interventions
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Compassion-Focused Therapy
Compassion-Focused Therapy 11 weeks of Compassion-Focused Therapy \[based on "Compassion-Focused Therapy for Dummies" (Welford, 2016)\]
Eligibility Criteria
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Inclusion Criteria
* Aged 18+ (no upper age limit)
* Ability to provide informed consent (as defined by the Five Statutory Principles of the Mental Capacity Act, Code of Practice, 2007)
Exclusion Criteria
* Active suicidality
* Terminal illness
* Inability to provide informed consent
18 Years
ALL
No
Sponsors
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NHS Lothian
OTHER_GOV
University of Edinburgh
OTHER
Responsible Party
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Principal Investigators
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Su Tin
Role: PRINCIPAL_INVESTIGATOR
University of Edinburgh
Locations
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Astley Ainslie Hospital
Edinburgh, Edinburgh City, United Kingdom
Countries
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References
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Fritz MS, Mackinnon DP. Required sample size to detect the mediated effect. Psychol Sci. 2007 Mar;18(3):233-9. doi: 10.1111/j.1467-9280.2007.01882.x.
McCracken LM, Gutierrez-Martinez O. Processes of change in psychological flexibility in an interdisciplinary group-based treatment for chronic pain based on Acceptance and Commitment Therapy. Behav Res Ther. 2011 Apr;49(4):267-74. doi: 10.1016/j.brat.2011.02.004. Epub 2011 Feb 15.
Hayes SC, Luoma JB, Bond FW, Masuda A, Lillis J. Acceptance and commitment therapy: model, processes and outcomes. Behav Res Ther. 2006 Jan;44(1):1-25. doi: 10.1016/j.brat.2005.06.006.
Provided Documents
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Document Type: Study Protocol and Statistical Analysis Plan
Document Type: Informed Consent Form
Other Identifiers
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S0815692
Identifier Type: -
Identifier Source: org_study_id
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