ISRCTN ISRCTN12107048
DOI https://doi.org/10.1186/ISRCTN12107048
Secondary identifying numbers Version 2.0 18.05.2020
Submission date
27/05/2020
Registration date
28/05/2020
Last edited
14/11/2022
Recruitment status
No longer recruiting
Overall study status
Completed
Condition category
Nutritional, Metabolic, Endocrine
Prospectively registered
Protocol
Statistical analysis plan
Results
Individual participant data

Plain English Summary

Current plain English summary as of 15/06/2021:

Background and study aims
The social distancing and isolation measures imposed during the Coronavirus (COVID-19) pandemic mean adults with overweight and obesity may be vulnerable to weight gain and the associated negative impacts on health. The SWiM-C study is trying to find the best way to help people with overweight and obesity prevent weight gain and support good physical and mental health.
We will look at whether a new online self-help programme or standard advice is better at helping people to prevent weight gain and support their emotional wellbeing.

Who can participate?
We are currently recruiting adults (aged over 18 years) with overweight/obesity (BMI > 25 kg/m²) and access to weighing scales at home.

What does the study involve?
We will recruit participants and randomly assign them into one of two groups: one group receives ‘SWiM’; and one group receives standard advice materials. We will ask all participants to complete an online questionnaire at the beginning of the study, at 4 months, and 12 months so we can measure changes in weight and other outcomes. After the study ends, we will also interview a small sample of participants over the telephone to find out about their experience of the SWiM programme and the study.

What are the possible benefits and risks of participating?
BENEFITS:
The information provided in this study will help us to understand how to help people to manage their weight and support their wellbeing during social distancing and isolation. Participants will be part of a unique study that may be helpful in providing better support for weight management and wellbeing in the UK during this unique time. It will also inform interventions to support people with weight management in other situations. Participants will receive one of two treatments which may help to improve your health.
RISKS:
Other than the time it takes participants to complete the online surveys, there should be very little risk or disadvantage to taking part.

Where is the study run from?
MRC Epidemiology Unit, University of Cambridge (UK)

When is the study starting and how long is it expected to run for?
April 2020 to September 2021

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

Who is the main contact?
Jenny Woolston, jenny.woolston@mrc-epid.cam.ac.uk

_____

Previous plain English summary:

Background and study aims
The social distancing and isolation measures imposed during the Coronavirus (COVID-19) pandemic mean adults with overweight and obesity may be vulnerable to weight gain and the associated negative impacts on health. The SWiM-C study is trying to find the best way to help people with overweight and obesity prevent weight gain and support good physical and mental health.
We will look at whether a new online self-help programme or standard advice is better at helping people to prevent weight gain and support their emotional wellbeing.

Who can participate?
We are currently recruiting adults (aged over 18 years) with overweight/obesity (BMI > 25 kg/m²) and access to weighing scales at home.

What does the study involve?
We will recruit participants and randomly assign them into one of two groups: one group receives ‘SWiM’; and one group receives standard advice materials. We will ask all participants to complete an online questionnaire at the beginning of the study and at 4 months so we can measure changes in weight and other outcomes. After the study ends, we will also interview a small sample of participants over the telephone to find out about their experience of the SWiM programme and the study.

What are the possible benefits and risks of participating?
BENEFITS:
The information provided in this study will help us to understand how to help people to manage their weight and support their wellbeing during social distancing and isolation. Participants will be part of a unique study that may be helpful in providing better support for weight management and wellbeing in the UK during this unique time. It will also inform interventions to support people with weight management in other situations. Participants will receive one of two treatments which may help to improve your health.
RISKS:
Other than the time it takes participants to complete the online surveys, there should be very little risk or disadvantage to taking part.

Where is the study run from?
MRC Epidemiology Unit, University of Cambridge (UK)

When is the study starting and how long is it expected to run for?
April 2020 to February 2021 (updated 06/04/2021, previously: April 2021)

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

Who is the main contact?
Jenny Woolston, jenny.woolston@mrc-epid.cam.ac.uk

Study website

Contact information

Mrs Jenny Woolston
Public

MRC Epidemiology Unit
University of Cambridge School of Clinical Medicine
Box 285 Institute of Metabolic Science
Cambridge Biomedical Campus
Cambridge
CB2 0QQ
United Kingdom

Phone +44 (0)1223 769204
Email jenny.woolston@mrc-epid.cam.ac.uk
Dr Amy Ahern
Scientific

MRC Epidemiology Unit
University of Cambridge School of Clinical Medicine
Box 285 Institute of Metabolic Science
Cambridge Biomedical Campus
Cambridge
CB2 0QQ
United Kingdom

Phone 01223 769138
Email Ala34@cam.ac.uk

Study information

Study designPragmatic randomized single-blind parallel-group two-arm single-centre trial
Primary study designInterventional
Secondary study designRandomised parallel trial
Study setting(s)Home
Study typePrevention
Participant information sheet Can be downloaded as a PDF from the link at the bottom of the following page http://www.mrc-epid.cam.ac.uk/research/studies/swim-c/information-for-participants/
Scientific titleAn acceptance and commitment therapy-based programme for weight management during the COVID-19 pandemic in people with overweight and obesity
Study acronymSWiM-C
Study hypothesisCurrent study hypothesis as of 15/06/2021:

To evaluate the effect of SWiM on weight at 4 months and 12 months follow-up, compared to standard advice on diet, physical activity and mood.

_____

Previous study hypothesis:

To evaluate whether SWiM reduces weight gain over 4 months compared to standard advice on diet, physical activity and mood
Ethics approval(s)Approved 24/04/2020, Cambridge Psychology Research Ethics Committee (School of the Biological Sciences, 17 Mill Lane, Cambridge, UK; +44 (0)1223 766894; Cheryl.Torbett@admin.cam.ac.uk), ref: PRE.2020.049 COV19
ConditionOverweight and Obesity
InterventionCurrent intervention as of 15/06/2021:
Participants will be randomised to either the SWiM intervention or to a standard advice wait list control using a computer-generated sequence with 1:1 allocation stratified by sex and BMI classification. If they have been allocated to the SWiM intervention, they will receive access to an online web platform with 12 modules (SWiM sessions) consisting of psychoeducational content, reflective exercises, and behavioural experiments. SWiM is intended to be a 12 week intervention, with 1 session completed per week. It also includes a weight tracker and remote support from a SWiM Coach via telephone after completing the week 4 session and via email after completing week 10 session. If allocated to standard advice waitlist control, they will be emailed a PDF of the European Association for the Study of Obesity (EASO) guidance on diet, physical activity and mood during the COVID 19 pandemic. At the end of the study participants who received standard advice will receive access to the SWiM website, and those who received SWiM will receive standard advice materials.
Participants will complete outcome assessments online at baseline, 4 months and 12 months.

_____

Previous interventions:

Participants will be randomised to either the SWiM intervention or to a standard advice wait list control using a computer-generated sequence with 1:1 allocation stratified by sex and BMI classification. If they have been allocated to the SWiM intervention, they will receive access to an online web platform with 12 modules (SWiM sessions) consisting of psychoeducational content, reflective exercises, and behavioural experiments. SWiM is intended to be a 12 week intervention, with 1 session completed per week. It also includes a weight tracker and remote support from a SWiM Coach via telephone after completing the week 4 session and via email after completing week 10 session. If allocated to standard advice waitlist control, they will be emailed a PDF of the European Association for the Study of Obesity (EASO) guidance on diet, physical activity and mood during the COVID 19 pandemic. At the end of the study participants who received standard advice will receive access to the SWiM website, and those who received SWiM will receive standard advice materials.
Participants will complete outcome assessments online at baseline and the end of the 12 week programme.
Intervention typeBehavioural
Primary outcome measureCurrent primary outcome measure as of 15/06/2021:

Self-reported weight (kg) at baseline and 4 and 12 months follow up

_____

Previous primary outcome measure:

Self-reported weight (kg) at baseline and 4 months
Secondary outcome measuresCurrent secondary outcome measures as of 15/06/2021:

At baseline 4 months, and 12 months:
1. General health measured using the Patient Health Questionnaire 8-item (PHQ-8)
2. Anxiety measured using the Generalized Anxiety Disorder 7-item (GAD-7) scale
3. Stress measured using the Perceived Stress Scale (PSS-4)
4. Weight-related thoughts and feelings measured using the Acceptance and Action Questionnaire Weight-Related (Revised) (AAQW-R)
5. Eating behaviour measured using the Three-Factor Eating Questionnaire (TFEQ-R21)
6. Physical activity measured using the International Physical Activity Questionnaire (IPAQ )
7. Health related quality of life measured using EQ-5D-L
8. Wellbeing measured using ICECAP-A
9. Website Usage (data analytics)
10. Demographics and intervention engagement

_____

Previous secondary outcome measures:

At baseline and 4 months:
1. General health measured using the Patient Health Questionnaire 8-item (PHQ-8)
2. Anxiety measured using the Generalized Anxiety Disorder 7-item (GAD-7) scale
3. Stress measured using the Perceived Stress Scale (PSS-4)
4. Weight-related thoughts and feelings measured using the Acceptance and Action Questionnaire Weight-Related (Revised) (AAQW-R)
5. Eating behaviour measured using the Three-Factor Eating Questionnaire (TFEQ-R21)
6. Physical activity measured using the International Physical Activity Questionnaire (IPAQ )
7. Health related quality of life measured using EQ-5D-L
8. Wellbeing measured using ICECAP-A
9. Website Usage (data analytics)
10. Demographics and intervention engagement
Overall study start date07/04/2020
Overall study end date30/09/2021

Eligibility

Participant type(s)Patient
Age groupAdult
Lower age limit18 Years
SexBoth
Target number of participants360
Total final enrolment388
Participant inclusion criteria1. Adults (Age ≥ 18 years)
2. Overweight or obesity (BMI ≥ 25kg/m²)
3. Good understanding of written English (materials are not suitable for non-English language speakers)
4. Willing to be randomised to either intervention and to complete outcome assessments online
5. Own a set of scales that they can weigh themselves with during the study
Participant exclusion criteria1. Bariatric surgery in the last 2 years
Recruitment start date08/06/2020
Recruitment end date07/09/2020

Locations

Countries of recruitment

  • England
  • United Kingdom

Study participating centre

MRC Epidemiology Unit
University of Cambridge School of Clinical Medicine
Box 285 Institute of Metabolic Science
Cambridge Biomedical Campus
Cambridge
CB2 0QQ
United Kingdom

Sponsor information

University of Cambridge
University/education

School of Clinical Medicine, Box 111
Cambridge Biomedical Campus
Cambridge
CB2 0SP
England
United Kingdom

Phone +44 (0)1223 769291
Email cad50@medschl.cam.ac.uk
Website http://www.cam.ac.uk/
ROR logo "ROR" https://ror.org/013meh722

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

Results and Publications

Intention to publish date30/04/2022
Individual participant data (IPD) Intention to shareYes
IPD sharing plan summaryAvailable on request
Publication and dissemination planPlanned publication in a high-impact peer-reviewed journal.
IPD sharing planThe datasets generated during and/or analysed during the current study will be available upon request from MRC Epidemiology Unit, University of Cambridge. Dr Amy Ahern, amy.ahern@mrc-epid.cam.ac.uk Data will become available following analyses completed by the PI and collaborators. Data request forms will need to be completed and sent to the PI for discussion with the other Principle Investigators. Consent will be obtained from participants and all data anonymised.

Study outputs

Output type Details Date created Date added Peer reviewed? Patient-facing?
Statistical Analysis Plan version V5 10/03/2021 17/03/2021 No No
Results article 13/04/2022 14/04/2022 Yes No
Statistical Analysis Plan 12-month analysis
version 3.1
16/03/2022 20/06/2022 No No
Protocol file version 5.0 25/05/2021 28/09/2022 No No
Results article qualitative results 13/09/2022 17/10/2022 Yes No
Results article 12-month follow up 11/11/2022 14/11/2022 Yes No

Additional files

ISRCTN12107048_SAP_V5_10Mar21.docx
Uploaded 17/03/2021
ISRCTN12107048_SAP_V3.1_16Mar22.pdf
12-month analysis
ISRCTN12107048_PROTOCOL_V5.0_25May21.pdf

Editorial Notes

14/11/2022: Publication reference added.
17/10/2022: Publication reference added.
28/09/2022: Uploaded protocol (not peer reviewed).
20/06/2022: Uploaded statistical analysis plan.
14/04/2022: Publication reference added.
21/01/2022: The scientific title has been changed from "An acceptance-based programme for weight management during the COVID-19 pandemic in people with overweight and obesity" to "An acceptance and commitment therapy-based programme for weight management during the COVID-19 pandemic in people with overweight and obesity".
07/12/2021: The following changes were made to the trial record:
1. The overall end date was changed from 31/12/2021 to 30/09/2021.
2. The plain English summary was updated to reflect these changes.
22/07/2021: The trial website has been changed from http://www.mrc-epid.cam.ac.uk/swim-c/ to https://www.mrc-epid.cam.ac.uk/research/studies/swim-feasibility/.
15/06/2021: The following changes were made to the trial record:
1. The study hypothesis was changed.
2. The overall end date was changed from 12/02/2021 to 31/12/2021.
3. The interventions were changed.
4. The primary outcome measure was changed.
5, The secondary outcome measures were changed.
6. The plain English summary was updated to reflect these changes.
06/04/2021: The following changes were made to the trial record:
1. The overall end date was changed from 30/04/2021 to 12/02/2021.
2. The plain English summary was updated to reflect these changes.
17/03/2021: Uploaded statistical analysis plan.
14/10/2020: The recruitment end date was changed from 08/10/2020 to 07/09/2020 and the total final enrolment number was added.
28/05/2020: Trial’s existence confirmed by University of Cambridge.