ClinicalTrials.gg
CompletedNCT04370444Updated Dec 18, 2023

Pathways for Patient-centered Diagnosis and Management of Endometriosis-associated Deep Dyspareunia

An interventional study of Phallus Length Reducer and Self-assessment of dyspareunia in Endometriosis-related Pain and Dyspareunia Deep, sponsored by BC Women's Hospital & Health Centre. Completed at 1 site in Canada. Open to participants aged 19 Years to 49 Years. Per ClinicalTrials.gov, last updated 2023-12-18.

Sponsored by BC Women's Hospital & Health Centre · Not applicable, Interventional, and Other

Phase
Not applicable
Study type
Interventional
Enrollment
30
Allocation
Randomized
Ages
19 Years to 49 Years
Sex
All
01

Study summary

The purpose of this study is to evaluate the acceptability and effectiveness of two tools that may help address the management of deep dyspareunia: 1) A phallus length reducer (PLR, brand name: Ohnut), consisting of 4 interconnected silicone rings worn externally over the penetrating object to reduce pain with deep penetration by allowing adjustable limitation of penetration depth, and 2) A vaginal insert for at home self-assessment of the extent and severity of deep dyspareunia.

Read the detailed description

Background: Endometriosis is a gynecological condition characterized by the abnormal growth of endometrial like tissue outside of the uterus. The condition affects approximately 10% of reproductive-age females and can cause various types of pain, including chronic pelvic pain and deep dyspareunia (pelvic pain with deep sexual intercourse). Research has shown that individuals with endometriosis and dyspareunia have significantly reduced sexual quality of life, lower self-esteem, and impaired sexual function. Qualitative research has also demonstrated that many individuals with dyspareunia feel guilty about their pain, and often continue to engage in intercourse even when the pain is severe.

Aims and Hypotheses:

  1. To measure the reduction in deep dyspareunia observed among people using the PLR with their partner. The investigators hypothesize that the PLR will be associated with a reduction in self-reported deep dyspareunia scores among participants randomized to the PLR intervention, compared to participants randomized to the waitlist control group. The measured reduction in deep dyspareunia will be used to power a future definitive trial.
  2. To assess the acceptability of the phallus length reducer (PLR) for participants with endometriosis and their partners. The investigators hypothesize that both partners will indicate the PLR is acceptable on the self-reported questionnaire.
  3. To explore whether an at-home assessment of dyspareunia is an acceptable and valid alternative to clinical measures. The investigators hypothesize that the at-home assessments of dyspareunia will be acceptable to participants and will yield results that are highly correlated with questionnaire-based and clinical assessments of this pain.
02

Conditions studied

  • Endometriosis-related Pain
  • Dyspareunia Deep

Keywords

  • endometriosis
  • dyspareunia
  • sexual distress
  • buffer
03

In context

Endometriosis

920 studies on the registry are indexed under Endometriosis; 266 are open to participants now.

This study's enrollment of 30 is below the median of 67 across 540 interventional studies indexed under Endometriosis.

Browse Endometriosis studies →

Lead sponsor

BC Women's Hospital & Health Centre is the lead sponsor of 11 studies on the registry; 2 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
19 Years to 49 Years
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

Patient

  • 19 to 49 years of age
  • Monogamous sexual partnership
  • Sexually active or not sexually active due to deep dyspareunia
  • Self-reported deep dyspareunia score ≥ 4/10
  • Sexual partner who is willing to participate
  • Willing to engage in penetrative sex at least once during the duration of the study

Partner

  • 19 years of age or older
  • Sexually active with a patient participant who has consented to participate in this study

Exclusion criteria

Exclusion Criteria:

Patient

  • Superficial dyspareunia score ≥ 4/10 (This is a potentially confounding variable; the PLR is not expected to affect introital pain)
  • Current use of a PLR
  • Inability to complete English-language questionnaires
  • GAD-7 score ≥ 15
  • PHQ-9 score ≥ 15
  • Intense fear/anxiety in anticipation of, during, or as a result of vaginal intercourse

Partner

  • Current use of a PLR
  • Inability to complete English-language questionnaires
05

Study design

Phase
Not applicable
Primary purpose
Other
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
30 participants (actual)

Study arms

  • Experimental
    Experimental (PLR)

    Participants will be given the OhNut Phallus Length Reducer (PLR) for use during the study period.

    Device: Phallus Length Reducer · Other: Self-assessment of dyspareunia

  • Other
    Control (Waitlist)

    Participants will not have a PLR during the study period. They will be placed on a waitlist to receive the PLR at the end of the study period.

    Other: Self-assessment of dyspareunia

Interventions

  • DevicePhallus Length Reducer

    Phallus Length Reducer

    Also known as: OhNut

  • OtherSelf-assessment of dyspareunia

    Use of a vaginal insert to self assess dyspareunia

06

What researchers measure

Primary outcomes

  1. Acceptability of the phallus length reducer (PLR)

    Acceptability of the PLR as measured via questionnaire using a 5 point likert scale (1 = most negative/ worst/ strongly disagree, 5 = most positive/ best/ strongly agree)

    Time frame: After 6 weeks of using the PLR

Secondary outcomes

  1. Severity of dyspareunia

    Self reported on an 11-point numeric rating scale (0 being no pain, 10 being worst pain imaginable)

    Time frame: Measured at baseline, before and after 6 weeks of using the PLR

  2. Change in sexual function

    Change in sexual function as measured by Female Sexual Function Index (FSFI). This a brief, self-administered questionnaire to assess key dimensions of sexual function in women. The scale consists of 19 items that assess sexual function over the past four weeks and are scored from 1 to 5 (with 1 being the lowest report of desire and 5 being the highest).

    Time frame: Measured at baseline, before and after 6 weeks of using the PLR

  3. Change in sexual distress

    Change in sexual distress as measured in Female Sexual Distress Scale-Revised (FSDS-R) This is a self-administered measure of female personal distress associated with sexual dysfunction. There are 13 questions. The range for each question is 0 (Never) to 4 (Always).

    Time frame: Measured at baseline, before and after 6 weeks of using the PLR

  4. Change in level of general anxiety (GAD-7)

    Change in level of general anxiety as measured using the General Anxiety Disorder - 7 questionnaire. There are 7 questions. The range for each question is 0 (not at all) to 4 (nearly every day).

    Time frame: Measured at baseline, before and after 6 weeks of using the PLR

  5. Change in level of general depression (PHQ-9)

    Change in level of general depression as measured using the Patient Health Questionnaire- 9 questionnaire. There are 9 questions. The range for each question is 0 (not at all) to 4 (nearly every day).

    Time frame: Measured at baseline, before and after 6 weeks of using the PLR

  6. Acceptability of self-measurement of dyspareunia

    Acceptability of self-measurement of dyspareunia will be measured via questionnaire using 5 point likert scale (1 = most negative/ worst/ strongly disagree, 5 = most positive/ best/ strongly agree)

    Time frame: After patient self-measurement of dyspareunia is complete (2 times during study)

  7. Validity of self-measurement of dyspareunia

    Dyspareunia score from the self-measurement will be compared to records of dyspareunia scores from physician performed pelvic exams. (11 point scale, 0 being no pain, 10 being worst pain imaginable)

    Time frame: Assessment and questionnaire administered 2 times, each one week apart, during the first 4 weeks of the study (to be assessed at week 2 and 3 of participant's menstrual cycle, which may vary)

  8. Feasibility - Recruitment

    The proportion of potentially eligible individuals who were successfully contacted by the study team (response rate); the proportion of contacted individuals who were ineligible, declined to participate, and consented; the number of couples enrolled per month of active recruitment (recruitment rate).

    Time frame: Up to 6 months

  9. Feasibility - Retention

    The proportion of enrolled participants who completed the study (retention rate).

    Time frame: Up to 6 months

  10. Feasibility - Intervention Fidelity

    To evaluate protocol adherence we documented: the proportion of sexual encounters using the Ohnut per couple in the intervention group during the intervention period (intervention fidelity) and the proportion of missing data.

    Time frame: Up to 6 months

07

Study locations

1 site
  • BC Women's Hospital
    Vancouver, British Columbia V6H 3N1, Canada
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Ran from Mar 2021 to primary completion in Oct 2021, 7 months.

Of 196 non-industry interventional studies with no phase under Endometriosis, half reached primary completion within 24 months of starting (the median), counting those still running; a quarter within 13 and three quarters within 44. This study's 7 months is below that.

Counting every sponsor, half of 211 studies reached it within 25 months; a quarter within 13 and three quarters within 44.

How these figures are worked out, and which studies are left out of them.

Registered
Apr 23, 2020
First posted
May 1, 2020
StartActual
Mar 10, 2021
Primary completionActual
Oct 31, 2021
CompletionActual
Dec 31, 2021
Last update
Dec 18, 2023
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Dec 18, 2023, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT04370444
Lead sponsor
BC Women's Hospital & Health Centre
Responsible party
Paul Yong (Principal Investigator, BC Women's Hospital & Health Centre) — Principal investigator
First posted
May 1, 2020
Start date
Mar 10, 2021
Primary completion
Oct 31, 2021
Completion
Dec 31, 2021
Last update
Dec 18, 2023

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in Dec 2023. You cannot join it, but the record below documents what was studied.

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