Condition category
Nutritional, Metabolic, Endocrine
Date applied
Date assigned
Last edited
Retrospectively registered
Overall trial status
Recruitment status
No longer recruiting
Publication status
Results overdue

Plain English Summary

Background and study aims
Obesity is a medical term used to describe someone who is very overweight. It is generally caused by eating too much and doing too little exercise. Being obese can lead to a number of serious and potentially life-changing conditions including type 2 diabetes, coronary heart disease, some cancers (e.g. breast and bowel cancers) and stroke. It can also affect a person’s mental well-being, leading to low self-esteem and depression. Interventions (treatments) are available to promote weight loss and so reduce the risks for these diseases. However, people often regain the lost weight, and there is uncertainty about how best to support long term weight loss maintenance. Based on the views of people that are able to maintain their weight loss, and of providers and commissioners of weight management services, as well as published research, we have developed an intervention to help people develop skills for weight loss maintenance (SkiM). SkiM focuses on self-managing thoughts, feelings and other influences on behaviour; and changing habits. In this study with 90 participants, we will evaluate the feasibility of combining this intervention with several existing weight loss programmes, provided by organisations commissioned to deliver community based weight management services. The purposes of the study are to develop a feasible weight management programme that specifically addresses weight loss maintenance, and to evaluate recruitment, retention, and other methodological strategies that will used in a later study.

Who can participate?
Adults with a body mass index over 30kg/m2.

What does the study involve?
The intervention involves group based or one-to-one support, alongside a self-help manual to help the participants develop and practice skills required for weight lost maintenance, while also being on a weight loss programme. Body weight, physical activity levels and other outcomes of interest are measured at the start of the study 6 months and 12 months after the end of the programme. Participants and the programme providers will be interviewed about their experiences of the programme in order to help us make it more acceptable or more effective.

What are the possible benefits and risks of participating?
Previous experience by the research group using similar behaviour change strategies in studies suggests that the risk of harm from participation is low. The focus of the programme is promotion of both healthy eating and levels of physical activity appropriate for the individual. Public and service user consultations have been used to check that proposed programme is regarded as reasonable and feasible. Procedures are in place to ensure monitoring for, and timely reporting of, any adverse incidents, and an independent medical team will assess any reports of adverse events
and make recommendations for trial conduct following them. The programme does involve exploration of personal issues by the individual and in one-to-one or group situations. Some
of these are potentially sensitive, such as body image, emotions that lead to overeating, and personal and social relationships that can influence eating and physical activity behaviours. The self help
manual, which encourages self reflection, is written by academics with expertise in health psychology and counselling, and reviewed by a Public and Patient Involvement (PPI) group gathered for this study. Group based and one-to-one work will be facilitated by practitioners trained and experienced in weight management and behaviour change, who will themselves be supervised by, and
receive any necessary support from, their own managers and the research team. Contact details of the Study Manager and Principal Investigator will be made available to all participants so that any concerns may quickly be brought to their attention. The University also has a research related
complaints procedure in place for any participant wishing to speak to someone independent of the study.

Where is the study run from?
University of Exeter Medical School (UK)

When is the study starting and how long is it expected to run for?
January 2015 to April 2018

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

Who is the main contact?
Dr Leon Poltawski

Trial website

Contact information



Primary contact

Dr Leon Poltawski


Contact details

University of Exeter Medical School
Medical School - Primary Care
Smeall Building
St Luke's
Heavitree Road
United Kingdom

Additional identifiers

EudraCT number number

Protocol/serial number


Study information

Scientific title

Skills for weight loss Maintenance (SkiM): the feasibility of an intervention to support weight loss maintenance, and of a trial to evaluate it



Study hypothesis

The purposes of the study are to develop a feasible weight management programme that specifically addresses weight loss maintenance, and to evaluate recruitment, retention, and other methodological strategies that will be used in a randomised control trial of the intervention.

Ethics approval

Southwest-Exeter REC, 15/06/2015, ref: 171313

Study design

Non-randomised; Interventional and Observational; Design type: Prevention, Treatment, Qualitative

Primary study design


Secondary study design

Randomised controlled trial

Trial setting


Trial type


Patient information sheet

Not available in web format, please use contact details to request a participant information sheet


Topic: Primary Care, Metabolic and endocrine disorders; Subtopic: Metabolic and Endocrine (all Subtopics), Primary care; Disease: Metabolic & Endocrine (not diabetes), All Diseases


SkiM. Behaviourally focused, using group, 1:1 and self-learning materials to develop and practice skills required for weight loss maintenance, while participating in a weight loss programme.
Follow Up Length: 18 month(s); Study Entry : Registration only

Intervention type



Drug names

Primary outcome measure

Weight; Timepoint(s): baseline, post-intervention (6 months) and follow-up (12 and 18 months)

Secondary outcome measures

1. Physical activity by accelerometry; Timepoint(s): baseline, post-intervention (6 months), follow-up (12 months)
2. Process measures by questionnaire; Timepoint(s): baseline, post-intervention (6 months), follow-up (12 and 18 months)
3. Waist circumference; Timepoint(s): baseline, post-intervention (6 months), follow-up (12 and 18 months)

Overall trial start date


Overall trial end date


Reason abandoned (if study stopped)


Participant inclusion criteria

1. Adults (aged at least 18 years)
2. BMI between 30kg/m2 (≥ 27.5kg/m2 for South Asian and Black African/Caribbean heritage populations) and 50kg/m2
3. Meet the eligibility criteria for entry to Tier 2 weight management services delivered by our Providers

The different BMI value for South Asian Black African/Caribbean heritage populations is based on recommendations by the National Institute of Health and Care Excellence (NICE), on who should receive weight management support. It reflects the fact that different ethnic groups have different risk levels because of their obesity, even if they have the same BMI.

Participant type


Age group




Target number of participants

Planned Sample Size: 80; UK Sample Size: 80; Description: 40 people in two consecutive cohorts. Each cohort comprises 4 groups of 10 receving a group-based intervention.

Participant exclusion criteria

We will not offer participation to people who
1. Are currently pregnant, planning to be pregnant during the study period, or have given birth in the preceding 6 months
2. Have a mental disability or low literacy preventing engagement with the intervention
3. Are deemed by their GP to be unable to participate in the study for any other reason (e.g. serious uncontrolled medical condition, psychiatric disorder, diagnosis of dementia, life threatening illness)
4. Are unable to make own arrangements to travel to intervention venue
5. Currently participating in another weight management programme (e.g. commercial weight loss programme)
6. Are participating in other health research, as this may overburden the participant or confound data collection

Recruitment start date


Recruitment end date



Countries of recruitment

United Kingdom

Trial participating centre

Exeter University Medical School (lead)
St Luke’s Campus Magdalen Road
United Kingdom

Trial participating centre

Westbank Healthy Living Centre
Farm House Rise
United Kingdom

Trial participating centre

Torbay and Southern Devon Health and Care NHS Trust
4th Floor Union House Union Street
Torquay, Devon
United Kingdom

Sponsor information


University of Exeter Medical School

Sponsor details

Department of Primary Care
Smeall Building
St. Luke's Campus
Magdalen Road
United Kingdom

Sponsor type




Funder type


Funder name

National Institute for Health Research

Alternative name(s)


Funding Body Type

government organisation

Funding Body Subtype

National government


United Kingdom

Results and Publications

Publication and dissemination plan

Not provided at time of registration

Intention to publish date

Participant level data

Not provided at time of registration

Basic results (scientific)

Publication list

Publication citations

Additional files

Editorial Notes

27/08/2020: Internal review.