Condition category
Date applied
Date assigned
Last edited
Retrospectively registered
Overall trial status
Recruitment status
No longer recruiting
Publication status

Plain English Summary

Background and study aims
Endometrial cancer, or cancer of the lining of the womb, has become the most common cancer of the reproductive tract in British women. Obese women are at increased risk of the disease and are also more likely to die from it. The recent obesity epidemic means that more women than ever before are developing the disease. Endometrial cancer can usually be cured by surgery but for obese or elderly women, surgery may be dangerous. It also renders a woman infertile. There is an urgent need to develop preventative strategies for an increasingly obese female population. Understanding more about the mechanisms linking obesity and endometrial cancer will help the development of these.
Bariatric surgery (reduction of stomach capacity by e.g. gastric banding) results in rapid weight loss: 10-15% excess body weight will be lost in six weeks with resolution of body mass index (BMI) to within the normal/overweight range (BMI 25-30) by 12 months. Non-surgical weight loss management can be effective but produces much slower results. Looking at the changes in the endometrium following weight loss may help us understand what causes endometrial cancer to develop and from there we can then look at what can be done to stop endometrial cancer developing.

Who can participate?
We will recruit around 100-150 morbidly obese (BMI>40) women aged 18 years or more who have been offered bariatric surgery or a non-surgical weight loss programme.

What does the study involve?
Both groups of women will have blood samples and a sample of the lining of the womb (endometrial biopsy) taken at recruitment. The women will then undergo surgery or follow their weight loss programme. All women will attend a follow up appointment 2 and 12 months later when a further blood sample and sample of the lining of the womb will be taken. Women will be asked to report their general health while in the study by filling out a questionnaire. They will also be asked about their quality of life before and after weight loss.

What are the possible benefits and risks of participating?
There will be no direct benefit to many of those taking part, but there should be benefits for future women with endometrial cancer because this study will help us investigate why endometrial cancer develops. Some patients with underlying endometrial pathology will be identified by taking part in the study, and for these women, further investigations and treatment may be necessary.

Where is the study run from?
Patients will be recruited from the Obesity Clinic at Salford Royal Hospital and followed up at St Mary’s Hospital in Manchester (UK).

When is study starting and how long is it expected to run for?
The study started April 2012 and is likely to complete April 2016.

Who is funding the study?
The research fellow salaries are funded by Central Manchester University Hospitals NHS Foundation Trust and the project costs are funded by NIHR (UK).

Who is the main contact?
Dr Emma Crosbie

Trial website

Contact information



Primary contact

Dr Emma Crosbie


Contact details

Institute of Cancer Sciences
St. Mary's Hospital
Oxford Road
M13 9WL
United Kingdom

Additional identifiers

EudraCT number number

Protocol/serial number

Version 4 - 02.08.13

Study information

Scientific title

The impact of obesity and weight loss on the endometrium: a prospective cohort study


Study hypothesis

Obesity and weight loss affect endometrial proliferation

Ethics approval

NRES Committee North West - Lancaster, 23/01/2012, ref: 12/NW/0050

Study design

Prospective cohort study

Primary study design


Secondary study design

Cohort study

Trial setting


Trial type


Patient information sheet

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


Endometrial cancer


Medical history, height and weight (to calculate BMI) hip and waist measurements a blood sample and an endometrial biopsy will be taken at the baseline clinic visit. At 6 weeks and 9-12 months post-surgery or post-initiation of medical treatment these will all be repeated. A general health questionnaire will be completed at the baseline clinic visit and at 12 months follow up.

Intervention type



Not Applicable

Drug names

Primary outcome measure

Ki67 expression by the endometrium (a marker of proliferation) measured at baseline and post weight loss (endometrial biopsy).

Secondary outcome measures

Endometrial markers, physiological markers and changes in menstrual function and mental wellbeing measured at baseline and post weight loss (blood sample and questionnaire).

Overall trial start date


Overall trial end date


Reason abandoned (if study stopped)


Participant inclusion criteria

1. Female aged 18 years or more
2. Undergoing bariatric surgery or commencing medical weight management therapy
3. Written informed consent to participate in the study

Participant type


Age group




Target number of participants


Participant exclusion criteria

1. Previous hysterectomy
2. Intrauterine device (IUD) or levonorgestrel intrauterine system (LNG-IUS) in situ
3. Previous endometrial ablation
4. Treatment with tamoxifen
5. Pregnancy

Recruitment start date


Recruitment end date



Countries of recruitment

United Kingdom

Trial participating centre

Institute of Cancer Sciences
M13 9WL
United Kingdom

Sponsor information


Central Manchester University Hospitals NHS Foundation Trust (CMFT) (UK)

Sponsor details

Oxford Road
M13 9WL
United Kingdom

Sponsor type

Hospital/treatment centre



Funder type

Hospital/treatment centre

Funder name

Central Manchester University Hospitals NHS Foundation Trust (research fellow salaries)

Alternative name(s)


Funding Body Type

government organisation

Funding Body Subtype

Local government


United Kingdom

Funder name

National Institute for Health Research (project costs)

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

2015 results presented at the annual meeting of the Blair Bell Research Society:
2019 results in:

Publication citations

Additional files

Editorial Notes

29/01/2019: Publication reference added. 15/05/2018: Publication reference added.