Integrated Mindfulness-based Cognitive Behaviour Therapy Versus Cognitive Behaviour Therapy for Provoked Vestibulodynia

Not Applicable

Completed

• Conditions: Provoked Vestibulodynia
• Interventions: Behavioral: Mindfulness-based Cognitive Therapy; Behavioral: Cognitive Behavioural Therapy

• Registration Number: NCT01704456
• Lead Sponsor: University of British Columbia

Brief Summary

This randomized trial, nicknamed the COMFORT (Cognitive therapy or Mindfulness FOR Treatment of pvd) study, will compare the effects of an 8-session group Mindfulness-based Cognitive Therapy (MBCT) to an 8-session group Cognitive Behavioural Therapy (CBT) for women with provoked vestibulodynia (PVD). Women with PVD will be randomly assigned to attend either eight sessions of group MBCT or CBT. Each session is 2.25 hours long and spaced 1 week apart. The purpose of this study is to determine whether the 8-session MBCT intervention for PVD is no worse than an 8-session CBT intervention for decreasing women's pain intensity, sexual distress, catastrophizing and hypervigilance towards pain.

Detailed Description

PURPOSE:

The purpose of this study is to determine whether an 8-session MBCT intervention for PVD is no worse than an 8-session CBT intervention for improving women's pain intensity and reducing their sexual distress, catastrophizing and hypervigilance towards pain. The investigators will also examine whether pain improvements at follow-up are mediated by changes in self-compassion and mindfulness (in the MBCT arm only) and moderated by pre-treatment credibility, personality, and anxiety sensitivity.

HYPOTHESES:

1. At follow-up (4 weeks, 6 months and 12 months post-treatment), women in the MBCT arm will experience a greater decline (vs. pre-treatment) in vestibular pain intensity compared to women in the CBT arm.

2. At follow-up (4 weeks, 6 months and 12 months post-treatment), women in the MBCT arm will experience a greater decline (vs. pre-treatment) in sex-related distress, pain catastrophizing, hypervigilance, and self-reported pain during intercourse/other penetrative sex compared to women in the CBT arm.

3. The investigators hypothesize that improvements in pain intensity during vestibular touch will be mediated by changes in self-compassion and mindfulness in the MBCT arm only at 6 and 12 months follow-up.

4. The investigators hypothesize that pre-treatment credibility, personality, and anxiety sensitivity will significantly moderate improvements in pain intensity during vestibular touch at 6 and 12 months follow-up.

5. The investigators hypothesize improvements in both arms on the "Patient Global Impression of Change Scale" and significantly greater improvements in the MBCT arm relative to the CBT arm at follow-up (4 weeks, 6 months and 12 months post-treatment).

Study Timeline

• Study First Submitted: 2012-08-22
• Study Start: 2012-10
• Study First Submitted QC: 2012-10-09
• Study First Posted: 2012-10-11
• Primary Completion: 2016-09
• Study Completion: 2017-09
• Results First Submitted: 2019-10-09
• Status Verified: 2020-02
• Results First Submitted QC: 2020-02-25
• Last Update Submitted: 2020-02-25
• Results First Posted: 2020-03-10
• Last Update Posted: 2020-03-10

Recruitment & Eligibility

• Status: COMPLETED
• Sex: Female
• Target Recruitment: 130

Inclusion Criteria

• diagnosis of provoked vestibulodynia (PVD)
• 19 years of age or older
• premenopausal
• fluent in English
• during the study, women must agree not to change any medications they are taking for PVD.

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Exclusion Criteria

• unprovoked vulvar pain, other pathology causing pain with penetration, or chronic pelvic pain
• being uncomfortable and unwilling to participate in a group setting.

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Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Mindfulness-based cognitive therapy (MBCT)	Mindfulness-based Cognitive Therapy	Women in the MBCT Group Treatment arm will receive the treatment in small group format (8-9 women). Each session will be 2.25 hours in duration and there will be eight, weekly sessions over the course of 2 months. Session content includes education about chronic pain, PVD, stress and sexual response, mindfulness practices, and cognitive techniques to notice thought patterns that contribute to increased pain.
Cognitive Behavioural Therapy (CBT)	Cognitive Behavioural Therapy	Women in the CBT Group Treatment arm will receive the treatment in small group format (8-9 women). Each session will be 2.25 hrs in duration and there will be eight, weekly sessions over the course of 2 months. Session content includes education about chronic pain, PVD, stress and sexual response, behavioural techniques such as progressive muscle relaxation, cognitive techniques to challenge unhealthy thinking patterns, and communication skills training.

Primary Outcome Measures

Name	Time	Method
Change in Vulvslgesiometer Pain Rating From Baseline to One Month Post-treatment to 6 Months Post-treatment	Pre-treatment, one month post-treatment and 6 months post-treatment.	The investigators have selected pain intensity during a controlled examination as the primary endpoint in this study. Specifically, pain intensity at the vulvar vestibule will be assessed using a vulvalgesiometer. The vulvalgesiometer is an instrument that provides a measure of pain/sensitivity that can be standardized across time points. The vulvalgesiometer is calibrated to exert a fixed amount of pressure. In this study, 30 grams of pressure at the 1, 3, 4, 6, 8, 9, and 11 o'clock positions (randomly) around the vestibule will be applied using the vulvalgestiometer. Women will also report their pain at each site using a numeric rating scale from 0 (no pain) to 10 (worst pain ever).

Secondary Outcome Measures

Name	Time	Method
Self-reported Pain During Penetration	Pre-treatment,one month post-treatment, and 6 months follow-up.	The investigators will measure self-report of pain during attempted or completed intercourse (or dildo entry for non-heterosexual women). Numeric Rating Scale that asked participants to rate the "intensity of pain during vaginal penetration attempts with sexual intercourse or penetration over the past 4 weeks" This question was rated on a 0 to 10 scale from no pain (0) to worst possible pain (10).
Sexual Distress	Pre-treatment, one month post-treatment, and 6 months post-treatment.	The investigators will examine women's self-reported sexual distress by administering the Female Sexual Distress Scale-Revised. This is a 12-item self-report questionnaire assessing for sexuality related personal distress. Scores on the scale range from 0 - 48, where higher scores represent higher levels of distress.
Chronic Pain Acceptance, CPAQ Pain Willingness	Pre-treatment, one month post-treatment, and 6 months post treatment.	The investigators will examine women's self-reported pain acceptance, activities engagement, by administering the CPAQ chronic pain acceptance questionnaire. The Chronic Pain Acceptance Questionnaire (CPAQ) measures the degree of acceptance of pain by chronic pain patients. It consists of 20 items measuring two domains: Activities Engagement and Pain Willingness. Total score range is from 0 - 120, with higher scores indicating higher levels of pain acceptance.; Subscales: Activities engagement (11 items)- Q 1, 2, 3, 5, 6, 8, 9, 10, 12, 15, 19 \[Scores Range: 0 - 66\] Pain willingness (9 items)- Q 4, 7, 11, 13, 14, 16, 17, 18, 20 \[Scores Range: 0 - 54\]
Sexual Function	Pre-treatment, one month post-treatment, and 6 months post-treatment.	The investigators will examine women's self-reported sexual function by administering the Female Sexual Function Index (FSFI). The Female Sexual Function Index (FSFI) is a 19-item self-report questionnaire which assesses sexual function in women. It covers six sexual domains: lubrication, arousal, desire, pain, orgasm and satisfaction. Scores range from 7.2 - 36 where increase in sexual dysfunction is represented by lower scores.; Subscales: Desire- 2, 3 \[Subscale scores Range: 1.2 - 6\] Arousal- 5,6,7,8 \[Subscale Scores Range: 1.2 - 6\] Lubrication- 9,10,11,12 \[Subscale Scores Range: 1.2 - 6\] Orgasm- 13, 14, 15 \[Subscale Scores Range: 1.2 - 6\] Satisfaction- 1, 16, 17 \[Subscale Scores Range: 1.2 - 6\] Pain- 18, 19, 20 \[Subscale Scores Range: 1.2 - 6\] Extra item: (4) have you been sexually active in past 4 weeks? (yes/no) \[Scores Range 0 (no) - 1 (yes)\]; Note: Ranges applicable only if question 4 was answered "yes".
Pain Hypervigilance	Pre-treatment, one month post-treatment, and 6 months post treatment.	The investigators will examine women's self-reported hypervigilance about pain by administering the Pain Vigilance and Awareness Questionnaire. The Pain Vigilance and Awareness Questionnaire (PVAQ) is a 16 item self-report measure to assess the awareness, vigilance, preoccupation and observation of pain. Sum total score \[Scores Range: 0 - 80\].
Pain Catastrophizing	Pre-treatment, one month post-treatment, and 6 months post-treatment..	The investigators will examine women's self-reported pain catastrophizing by administering the Pain Catastrophizing Scale. The Pain Catastrophizing Scale (PCS) is a self-report questionnaire that asks participants to think about past painful experiences, or a specific experience of pain, and to indicate the degree to which they have any of the presented thoughts or feelings when they are experiencing pain. Each one of the 13-items is rated on a Likert scale from 0 (not at all) to 4 (all the time), where a higher total score indicates higher pain catastrophizing.; Subscales: Rumination- (4 items) 8, 9, 10, and 11 \[Scores Range: 0 - 16\] Magnification- (3 items) 6, 7, and 13 \[Scores Range: 0 - 12\] Helplessness- (6 items) 1, 2, 3, 4, 5, and 12 \[Scores Range: 0 - 24\] Sum of all items \[Overall Range: 0 - 52\]
Chronic Pain Acceptance, Activities Engagement	Pre-treatment, one month post-treatment, and 6 months post-treatment.	The investigators will examine women's self-reported pain acceptance, activities engagement, by administering the CPAQ chronic pain acceptance questionnaire. The Chronic Pain Acceptance Questionnaire (CPAQ) measures the degree of acceptance of pain by chronic pain patients. It consists of 20 items measuring two domains, Activities Engagement and Pain Willingness. Total score range is from 0 - 120, with higher scores indicating higher levels of pain acceptance.; Subscales: Activities engagement (11 items)- Q 1, 2, 3, 5, 6, 8, 9, 10, 12, 15, 19 \[Scores Range: 0 - 66\] Pain willingness (9 items)- Q 4, 7, 11, 13, 14, 16, 17, 18, 20 \[Scores Range: 0 - 54\]

Trial Locations

Locations (2)

Department of Gynaecology; 🇨🇦 Vancouver, British Columbia, Canada

British Columbia Centre for Sexual Medicine; 🇨🇦 Vancouver, British Columbia, Canada