ISRCTN ISRCTN98699098
DOI https://doi.org/10.1186/ISRCTN98699098
Secondary identifying numbers Protocol number 1
Submission date
12/09/2016
Registration date
09/12/2016
Last edited
26/04/2021
Recruitment status
No longer recruiting
Overall study status
Completed
Condition category
Mental and Behavioural Disorders
Prospectively registered
Protocol
Statistical analysis plan
Results
Individual participant data

Plain English summary of protocol

Background and study aims
It has been understood for some time now that environmental tobacco smoke (ETS) is harmful to the health of those breathing it in, particularly so in the case of young children. Children often breathe in ETS because their parents smoke and they are at particular risk of ETS if their mother smokes. It is not clear at the moment whether programmes (or interventions) developed to reduce the amount of ETS that children breathe in actually work. This study is testing a programme called the Smokefree Homes Service that will shortly be made available across the city of Stoke-on-Trent and that uniquely consists of telephone support, self-help materials and Nicotine Replacement Therapy (NRT)

Who can participate?
Households that agree to participate in the Smokefree Homes Service.

What does the study involve?
Potential participants/households are identified and , as long as they are happy to take part, they are randomly allocated a “time to intervention” by the researcher. This means that the time at which they start the Smokefree Homes Service during the study period will be at random. All participants do receive the Smokefree Homes Service at some point, however. This includes support via telephone, being provided with self-help materials and being given NRT. They are also given access to various training and support from a number of organisations. The programme runs for a total of 12 weeks.

What are the possible benefits and risks of participating?
Potential benefits to participants include being able to share their experience of the service and whether it has helped them to make their home smoke free. There are no risks beyond the inconvenience of organizing home visits during the study.

Where is the study run from?
University of Bristol (UK)

When is the study starting and how long is it expected to run for?
August 2016 to May 2017

Who is funding the study?
National Institute for Health Research (UK)

Who is the main contact?
Dr Frank de Vocht
frank.devocht@bristol.ac.uk

Contact information

Dr Frank de Vocht
Scientific

School of Social and Community Medicine
University of Bristol
Canynge Hall, 39 Whatley Road
Bristol
BS8 2PS
United Kingdom

ORCiD logoORCID ID 0000-0003-3631-627X
Phone 00441179287239
Email frank.devocht@bristol.ac.uk

Study information

Study designSingle-centre stepped-wedge cluster randomised trial
Primary study designInterventional
Secondary study designCluster randomised trial
Study setting(s)Community
Study typeOther
Participant information sheet Not available in web format, please use contact details to request a participant information sheet.
Scientific titleStoke-on-Trent Smokefree Homes Service Evaluation: a stepped-wedge cluster randomised controlled trial
Study acronymSSHSE
Study objectivesParticipation in the service leads to statistically significant reduction in indoor smoking, measured by:
1. Self-reported behavioural change
2. Indoor smoking-related particulate matter concentrations
Ethics approval(s)University of Bristol Health Sciences Faculty Research Ethics Committee, 05/08/2016, ref: 39241
Health condition(s) or problem(s) studiedSelf-reported home indoor tobacco smoking, 24hr indoor air pollution (PM2.5) concentration, and carbon monoxide concentration in exhaled air (all family members aged 16 years or older).
InterventionReceiving/participating in Smokefree Homes Service:
1. Telephone behavioural support
2 Self-help materials for 12 weeks plus Nicotine Replacement Therapy (NRT), sent by post to support temporary abstinence from smoking
3. Training and support for frontline staff from a range of organisations

Every participant will receive the intervention, but time-to-start will be randomized (randomization done by PI)
Intervention typeBehavioural
Primary outcome measureSuccessful smokefree home at the end of follow-up (8 month maximum). The a priori cut-off to define “smokefree” is based on:
1.1. Self-reported cessation of smoking of all family members, assessed by a questionnaire
OR
1.2. Self-reported cessation of indoor smoking (with or without use of nicotine patches), assessed by a questionnaire
AND
2. Average 24-hr average PM2.5 indoor concentration <50% of pre-intervention measurement, measured using the air quality monitor Dylos DC1700
Secondary outcome measures1. Pre/post intervention difference in 24-hr average indoor PM2.5 concentration, measured using the air quality monitor Dylos DC1700
2. Amount of carbon monoxide (CO) in exhaled air (as a measure of individual health benefit and to confirm self-reported smoking cessation. CO in exhaled air of family members will be measured using the Bedfont Micro+ Smokerlyzer

Measured pre/post intervention.
Overall study start date20/08/2016
Completion date01/05/2017

Eligibility

Participant type(s)Mixed
Age groupAdult
SexBoth
Target number of participants80 households
Total final enrolment0
Key inclusion criteria1. Every household that has agreed to participate in the Smokefree Homes Service
2. Household members aged 16 years or older
Key exclusion criteria1. Not participating in Smokefree Homes Service
2. Younger than 16 years of age
Date of first enrolment01/09/2016
Date of final enrolment01/02/2017

Locations

Countries of recruitment

  • England
  • United Kingdom

Study participating centre

University of Bristol
School of Social and Community Medicine
Canynge Hall
39 Whatley Road
Bristol
BS8 2PS
United Kingdom

Sponsor information

University of Bristol
University/education

Senate House
Tyndall Avenue
Bristol
BS8 1TH
England
United Kingdom

ROR logo "ROR" https://ror.org/0524sp257

Funders

Funder type

Government

National Institute for Health Research
Government organisation / National government
Alternative name(s)
National Institute for Health Research, NIHR Research, NIHRresearch, NIHR - National Institute for Health Research, NIHR (The National Institute for Health and Care Research), NIHR
Location
United Kingdom
Public Health England
Government organisation / National government
Alternative name(s)
PHE
Location
United Kingdom

Results and Publications

Intention to publish date30/03/2018
Individual participant data (IPD) Intention to shareNo
IPD sharing plan summaryNot expected to be made available
Publication and dissemination planThe researchers anticipate five deliverables of the PHES by the end of the project (2018):
1. A final report will be prepared for dissemination for peer-review to NIHR
2. A distilled version of the final report will be written as a journal article to be submitted to an international peer-review journal in open access format
3. For fast dissemination and knowledge transfer to the academic community, we anticipate a presentation at an appropriate conference (to be determined)
4. We further aim to present at an even or events (conference/regional meeting) for local authority (to be determined)
5. A summary briefing paper will be made available for knowledge transfer to local authorities
IPD sharing plan

Study outputs

Output type Details Date created Date added Peer reviewed? Patient-facing?
Basic results 26/04/2021 26/04/2021 No No

Additional files

ISRCTN98699098_BasicResults_26Apr2021.pdf
Uploaded 26/04/2021

Editorial Notes

26/04/2021: The following changes have been made:
1. The basic results of this trial have been uploaded as an additional file.
2. The final enrolment number has been added from the basic results summary.