Effects of a new mattress and pillow for nightly pelvic girdle pain during pregnancy

ISRCTN ISRCTN13438272
DOI https://doi.org/10.1186/ISRCTN13438272
Secondary identifying numbers VGRFOU-242761
Submission date
20/04/2018
Registration date
27/04/2018
Last edited
20/12/2021
Recruitment status
No longer recruiting
Overall study status
Completed
Condition category
Pregnancy and Childbirth
Prospectively registered
Protocol
Statistical analysis plan
Results
Individual participant data

Plain English summary of protocol

Background and study aims
Three out of ten pregnant women experience pelvic girdle pain (PGP) and one of ten experiences severe pain. Many of these women have difficulties finding a pain-free sleeping position. This can result in frequent awakenings during the night and daytime tiredness.
A newly developed mattress and pillow have been specially designed for patients with sleep apnea (breathing problems when asleep) so that they avoid sleeping on their back and can achieve a comfortable sleeping position on their side. The newly developed mattress and pillow consists of stretchy foam that shapes around the body. The pillow is separated from the mattress, resulting in a unique possibility to support the shoulder and pelvis when sleeping on the side.
The aim of this study is to investigate whether this mattress and pillow, when added to standard treatment, can decrease nightly pain and sick leave, improve daily function, sleep quality, subjective sleeping time and quality of life, and influence thoughts about pain in pregnant women with PGP.

Who can participate?
Pregnant women with moderate or severe nightly PGP

What does the study involve?
An independent specially-trained physiotherapist will assess patients who are eligible and willing to participate in the study. This assessment will include a physical examination and filling out questionnaires. All randomized participants will receive standard treatment at the first visit. Standard treatment consists of general information about the condition and anatomy of the back and pelvis. Advice is given on the participant's activities of daily living as well as exercises to do at home that are designed to increase strength in the abdominal (lower body) and gluteal (buttock) muscles. Both groups will be offered the mattress and pillow. Group 1 (the control group) can use the mattress and pillow after 4 weeks of standard treatment alone and group 2 (the intervention group) can use them in addition to standard treatment from the start of the study. Women who are satisfied with the mattress and pillow can borrow them through their pregnancy. The same self-assessed questionnaires of pain, function, sleep quality, subjective sleeping time, sickness leave, quality of life and thoughts about pain will be re-done after 4 and 8 weeks.
In a sub-study, sleep quality will be investigated in some of each group using polysomnography (sleep tracking).

What are the possible benefits and risks of participating?
Possible benefits of participating in the study are that all women get additional treatment as well as standard treatment and that women who are satisfied with the mattress and pillow can borrow them through their pregnancy. It has been confirmed in earlier studies as well as in clinical practice that there are no side effects reported of sleeping with this mattress and pillow. A possible risk is that the exercises that the women do at home can give short-lasting pain.

Where is the study run from?
Sahlgrenska University Hospital in Gothenburg, Sweden

When is the study starting and how long is it expected to run for?
March 2018 to June 2020

Who is funding the study?
The Healthcare Board, Region Västra Götaland (Sweden)

Who is the main contact?
Professor Helen Elden
helen.elden@gu.se

Contact information

Prof Helen Elden
Scientific

Sahlgrenska University hospital/ East hospital
Gothenburg
41650
Sweden

Study information

Study designRandomized controlled cross-over multicenter trial
Primary study designInterventional
Secondary study designRandomised cross over trial
Study setting(s)Home
Study typeTreatment
Participant information sheet Not available in web format, please use contact details to request a participant information sheet.
Scientific titleEffects of a new mattress and pillow as adjunct to standard treatment for nightly pelvic girdle pain in pregnant women: a randomised controlled study
Study acronymN/A
Study objectivesNull hypothesis: there is no difference in pelvic girdle pain (intensity on a visual analogue scale) in pregnant women after 4 weeks of standard treatment alone and pelvic girdle pain (intensity on a visual analogue scale) in pregnant women after 4 weeks of sleeping on a newly developed mattress and pillow as adjunct to standard treatment.
Ethics approval(s)The Regional ethical review board in Gothenburg, 05/03/2018, 100-18
Health condition(s) or problem(s) studiedPelvic girdle pain (PGP) in pregnant women
InterventionAn independent specially-trained physiotherapist will assess patients who are eligible and willing to participate in the study. This assessment will include a detailed standardized physical examination and collection of baseline data through self-assessment questionnaires. All randomised participants will receive standard treatment at the inclusion visit. Standard treatment consists of general information about the condition and anatomy of the back and pelvis. Adequate advice and practice are also given with respect to the participant's activities of daily living as well as home programme exercises designed to increase strength in the abdominal and gluteal muscles. The newly developed mattress and pillow consists of viscoelastic foam, which shapes around the body. The pillow is separated from the mattress, resulting in a unique possibility to offload the shoulder and pelvis and receive a comfortable sleeping position in a lateral position. Both groups will be offered the mattress and pillow. Group 1 after 4 weeks of standard treatment alone and group 2 (intervention group) as adjunct to standard treatment after randomisation at the inclusion visit. Women who are satisfied with the mattress and pillow can borrow them through their pregnancy. The same assessment and self-assessed questionnaires of pain, function, sleep quality, subjective sleeping time, sickness leave, quality of life and thoughts about pain will be evaluated after 4 and 8 weeks.
In a sub study, sleep quality will be investigated in a sub-group of the participants (10 from each group) using polysomnography.
Intervention typeDevice
Pharmaceutical study type(s)
Phase
Drug / device / biological / vaccine name(s)
Primary outcome measureCurrent primary outcome measure as of 15/09/2021:
Intensity of nightly pelvic girdle pain measured on a 100-point visual analogue scale (VAS) every morning for the 8 week trial period


Previous primary outcome measure as of 18/03/2021:
Participant's score of the intensity of their nightly pelvic pain on a 100-point visual analogue scale (VAS), every morning and their present pelvic pain every evening in a diary

_____

Previous primary outcome measure:
Participant's score of the intensity of their present pelvic pain on a 100-point visual analogue scale (VAS), every morning and every evening in a diary
Secondary outcome measures1. The Swedish version of the Pelvic Girdle Questionnaire (PGQ), a questionnaire specific for pelvic girdle pain in pregnancy
2. EuroQoL questionnaire measuring health function and health-related quality of life
3. Pain catastrophizing scale (PCS) a questionnaire measuring thoughts about pain
4. Epworth sleepiness scale (ESS) and subjective sleeping time (number of hours)
All questionnaires will be filled at baseline, 4 and 8 weeks.

Sleep registration (polysomnography) will be performed during 2-3 nights in 20 participants (10 in each group)
Overall study start date23/03/2018
Completion date15/06/2020

Eligibility

Participant type(s)Patient
Age groupAdult
SexFemale
Target number of participants70
Total final enrolment66
Key inclusion criteria1. Otherwise healthy
2. Pregnant with singleton fetus and have completed 12-30 gestational weeks
3. Well integrated in the Swedish language
4. Pregnancy-related PGP according to the European Guidelines of diagnosis and treatment of PGP
5. Mean self-reported evening pain intensity of ≥40 mm (on a VAS) in their baseline diary, i.e. 5-7 days before the screening visit
Key exclusion criteriaOther pain conditions
Date of first enrolment15/04/2018
Date of final enrolment03/03/2020

Locations

Countries of recruitment

  • Sweden

Study participating centres

Sahlgrenska University hospital
Gothenburg
S-413 45
Sweden
Womens health clinic in Partille
Partille
S-433 23
Sweden
Womens health clinic in Gråbo
Gothenburg
S-443 42
Sweden

Sponsor information

The Healthcare Board, Region Västra Götaland (Hälso- och sjukvårdsstyrelsen)
Research council

Regionens Hus
Göteborg
405 44
Sweden

ROR logo "ROR" https://ror.org/00a4x6777

Funders

Funder type

Not defined

The Healthcare Board, Region Västra Götaland (Hälso- och sjukvårdsstyrelsen)

No information available

Results and Publications

Intention to publish date01/06/2021
Individual participant data (IPD) Intention to shareNo
IPD sharing plan summaryData sharing statement to be made available at a later date
Publication and dissemination planPlanned publication in a high-impact peer reviewed journal.
IPD sharing planThe data sharing plans for the current study are unknown and will be made available at a later date.

Study outputs

Output type Details Date created Date added Peer reviewed? Patient-facing?
Results article 01/12/2021 20/12/2021 Yes No

Editorial Notes

20/12/2021: The following changes have been made:
1. Publication reference added.
2. The total final enrolment number has been added.
15/09/2021: The following changes have been made:
1. The public title has been changed from "Effects of a newly developed mattress and pillow for pelvic girdle pain during pregnancy." to “Effects of a new mattress and pillow for nightly pelvic girdle pain during pregnancy".
2. The scientific title has been changed from "Effects of a newly developed mattress and pillow for pelvic girdle pain during pregnancy: a randomized controlled cross-over trial." to “Effects of a new mattress and pillow as adjunct to standard treatment for nightly pelvic girdle pain in pregnant women: a randomised controlled study”.
3. The primary outcome measure has been updated.
18/03/2021: The following changes have been made:
1. The primary outcome measure has been changed.
2. The recruitment end date has been changed from 31/03/2019 to 03/03/2020.
3. The plain English summary has been updated.
4. Intention to publish date added.
18/03/2020: The plain English summary was updated.
06/03/2020: The following changes were made to the trial record:
1. The overall trial end date was changed from 23/03/2019 to 15/06/2020.
2. The intention to publish date was changed from 31/12/2020 to 15/01/2021.