Are SMS vouchers or posted vouchers more effective for increasing response rates in a work-related survey in people with persistent pain?
| ISRCTN | ISRCTN93103453 |
|---|---|
| DOI | https://doi.org/10.1186/ISRCTN93103453 |
| Secondary identifying numbers | NRC 326732 |
- Submission date
- 13/06/2022
- Registration date
- 25/07/2022
- Last edited
- 14/05/2024
- Recruitment status
- No longer recruiting
- Overall study status
- Completed
- Condition category
- Injury, Occupational Diseases, Poisoning
Plain English summary of protocol
Background and study aims
Response rates are important in trials as high response rates mean that the sample is more likely to be reflective of the population from which it was drawn. While vouchers are known to increase response rates in trials, little work has been done to explore whether the method of delivery affects response. We will explore whether receiving vouchers by SMS message or in the post has a large effect on response rates.
Who can participate?
Those consenting to participate in a cohort study of the impact of being unemployed with persistent pain, with the chance of being offered an intervention to help people from the population to return to work and for which NOK 200 of high street vouchers are being offered as an incentive to complete questionnaires.
What does the study involve?
The study involves randomising participants to receive their vouchers either by SMS or by post
What are the possible benefits and risks of participating?
This is a methods trial comparing two ways of receiving vouchers and not a health care intervention, thus no benefits or risks are identified.
Where is the study run from?
Kristiania University College (Norway)
When is the study starting and how long is it expected to run for?
May 2022 to April 2023
Who is funding the study?
Research Council of Norway (Norway)
Who is the main contact?
Professor Robert Froud (Norway)
RobertJames.Froud@kristiania.no
Contact information
Principal Investigator
Kristiania University College
Prinsens gate 7-9
Oslo
0107
Norway
 ORCID ID |
0000-0002-9193-2297 |
|---|---|
| Phone | +47 41 26 73 69 |
| RobertJames.Froud@kristiania.no |
Study information
| Study design | Randomized controlled trial |
|---|---|
| Primary study design | Interventional |
| Secondary study design | Randomised parallel trial |
| Study setting(s) | Other |
| Study type | Quality of life |
| Scientific title | Are SMS vouchers or posted vouchers more effective for increasing response rates in a work-related survey in people with persistent pain? |
| Study acronym | SPOST |
| Study objectives | Is there a large difference between SMS vouchers or posted vouchers for increasing response rates in a work-related survey in people with persistent pain? |
| Ethics approval(s) | Approval 16/05/2022, Regional Committees for Medical and Health Research Ethics (Gullhaugveien 1-3, 0484, Oslo, Norway; +47 22 84 55 22; rek-sorost@medisin.uio.no), ref: 402918. |
| Health condition(s) or problem(s) studied | Pain |
| Intervention | Current interventions, as of 17/01/2023: We will study the follow-up rate at three months for people enrolled in a cohort randomised study (ISRCTN85437524) and who are offered vouchers to participate. We will randomise all participants, regardless of what arm they are in, in a cohort randomised approach to receive the vouchers either by SMS or by post. The objective is to see if there is a large difference (ie of 30% or more) in follow-up rate at three months with one or other of the voucher offer methods. If no difference is detected then SMS would be preferred as it is less expensive and has a lower carbon footprint. _____ Previous interventions: We will study the follow-up rate at six months (primary) and 12 months (secondary) for people enrolled in a cohort randomised study (ISRCTN85437524) and who are offered vouchers to participate. We will randomise all participants, regardless of what arm they are in in the cohort randomised approach to receive the vouchers either by SMS or by post. The objective is to see if there is a large difference (ie of 30% or more) in follow-up rates with one or other of the voucher offer methods. If no difference is detected then SMS would be preferred as it is less expensive and has a lower carbon footprint. |
| Intervention type | Behavioural |
| Primary outcome measure | Current primary outcome measure as of 17/01/2023: Follow-up response rate, measured using the number of three-month follow-up questionnaires received divided by the number of baseline measurements received. _____ Previous primary outcome measure: Follow-up response rate, measured using the number of three-month follow-up questionnaires received divided by the number of baseline measurements sent at three-months |
| Secondary outcome measures | Current secondary outcome measures as of 17/01/2023: Follow-up response rates, measured using the number of six- and 12-month follow-up questionnaires received divided by the number of baseline questionnaires, may be subsequently conducted. _____ Previous secondary outcome measures: Follow-up response rates, measured using the number of six- and 12-month follow-up questionnaires received divided by the number of baseline questionnaires sent at six- and 12-months |
| Overall study start date | 01/05/2022 |
| Completion date | 30/04/2023 |
Eligibility
| Participant type(s) | Other |
|---|---|
| Age group | Adult |
| Sex | Both |
| Target number of participants | 58 (73 including inflation allowing for 20% dropouts/withdrawals) |
| Total final enrolment | 101 |
| Key inclusion criteria | Participants in cohort randomised trial ISRCTN85437524 |
| Key exclusion criteria | Participants not in ISRCTN85437524 |
| Date of first enrolment | 15/06/2022 |
| Date of final enrolment | 16/01/2023 |
Locations
Countries of recruitment
- Norway
Study participating centre
Oslo
0107
Norway
Sponsor information
University/education
Høyskolen Kristiania
PB 1155 Sentrum
Prinsens gate 7-9
Oslo
0107
Norway
| Phone | +47 22 59 60 00 |
|---|---|
| forskadm@kristiania.no | |
| Website | https://www.forskningsradet.no/ |
"ROR" |
https://ror.org/03gss5916 |
Funders
Funder type
Research council
Government organisation / National government
- Alternative name(s)
- Forskningsrådet, Norwegian Research Council, Research Council of Norway
- Location
- Norway
Results and Publications
| Intention to publish date | 31/03/2025 |
|---|---|
| Individual participant data (IPD) Intention to share | Yes |
| IPD sharing plan summary | Available on request |
| Publication and dissemination plan | We aim at publishing a single report in a peer-reviewed journal and presenting results at national and international conferences |
| IPD sharing plan | After completion of the ReISE project and all peer-reviewed publications and disseminations will be complete and published, anonymised/de-identified data will be available upon reasonable request to the data custodian at Kristiania University College. De-identified data will be stored in a secure database for this purpose. Protocol, data from intervention, and statistical analysis plan can be delivered upon reasonable request to principal investigator. RobertJames.Froud@kristiania.no |
Editorial Notes
14/05/2024: The intention to publish date was changed from 31/12/2024 to 31/03/2025.
27/02/2024: The intention to publish date was changed from 01/08/2023 to 31/12/2024.
17/01/2023: The following changes were made to the trial record:
1. The interventions were changed.
2. The primary outcome measure was changed.
3. The secondary outcome measures were changed.
4. The total final enrolment was added.
16/06/2022: Trial's existence confirmed by the Norwegian Regional Committees for Medical and Health Research Ethics.
