Plain English Summary
Background and study aims
At any given age and body build, people from the India and surrounding areas get more heart disease and diabetes than Europeans. Research suggests that the risk of developing these disorders is related to growth during fetal life (while in the womb) and childhood. The reasons for this are unknown. Previous research has studied risk factors for heart disease and measures of arterial health (the heart and its arteries) in two cohorts of young Indian adults in New Delhi and Vellore. Their early growth was recorded in detail and it was found that risk factors (hypertension, pre-diabetes, blood fats) but not arterial health, were related to growth in early life. A relatively unresearched part of cardiovascular (heart) disease in South Asians is the health of the cardiac muscle itself. The aim of this study is to assess the structure and function of the heart muscle using echocardiography (a test that uses sound to create images of the heart) in 3,000 men and women from the same cohorts, and relate these to early life growth and to risk factors and lifestyle measurements in young adulthood in order to lead to future interventions to improve nutrition and growth in fetal life and childhood, and to encourage healthy adult lifestyles, that will prevent hypertension, diabetes and heart disease.
Who can participate?
All male and female subjects, aged over 40 years who have previously participated in the New Delhi and Vellore birth cohorts.
What does the study involve?
Participants are visited at home by field workers, who explain the study, provide information sheets, and obtain written informed consent. Information on lifestyle factors (tobacco and alcohol consumption, diet, physical activity, occupation and socio-economic status) and medical history (including cardiac events and procedures since the last follow-up) are updated. Participants are then invited to attend a clinic for an echocardiographic assessment of heart dimensions and function, measurement of wall thickness of the blood vessels in the neck using ultrasound, measurement of cardiometabolic risk factors (the risks of having diabetes, heart disease or stroke) and an electrocardiogram (a test that uses sensors to check the hearts rhythm each time it beats). Participants have their body composition (percentage of fat, bone, water, and muscle) recorded using a scanner.
What are the possible benefits and risks of participating?
Participants may benefit from receiving an extensive assessment of their cardiac status (heart health). The blood tests may help to identify if they have diabetes or high cholesterol. This can help the treating physicians to advise them on management of their health status. If the study participant has been diagnosed previously have diabetes, hypertension or cardiac disease, the tests done in this research can give them an idea of their current status and therefore aid in appropriate management. There are no anticipated risks, as apart from experiencing discomfort during blood sampling and the low risk of low radiation exposure during the scans and ultrasounds.
Where is the study run from?
This study is being run from the University of Southhampton and takes place in five clinics in India.
When is the study starting and how long is it expected to run for?
February 2015 to October 2019
Who is funding the study?
British Heart Foundation (UK)
Who is the main contact?
1. Professor Caroline Fall
chdf@mrc.soton.ac.uk
2. Dr Senthil Vasan
svk@mrc.soton.ac.uk
Trial website
Contact information
Type
Scientific
Primary contact
Prof Caroline Fall
ORCID ID
http://orcid.org/0000-0003-4402-5552
Contact details
MRC Lifecourse Epidemiology Unit
University of Southampton
Southampton General Hospital
Southampton
SO16 6YD
United Kingdom
+44 23 80777624
chdf@mrc.soton.ac.uk
Type
Public
Additional contact
Dr Senthil Vasan
ORCID ID
http://orcid.org/0000-0002-3630-6568
Contact details
MRC Lifecourse Epidemiology Unit
University of Southampton
Southampton General Hospital
Southampton
SO16 6YD
United Kingdom
+44 75 75323737
svk@mrc.soton.ac.uk
Additional identifiers
EudraCT number
ClinicalTrials.gov number
Protocol/serial number
18694
Study information
Scientific title
Childhood and young adult predictors of myocardial structure and function at age 45 years in the New Delhi and Vellore Birth Cohorts, India
Acronym
The IndEcho Study
Study hypothesis
1.The prevalence of myocardial abnormalities will be related to current cardiometabolic risk factors and those measured 12-16 years ago in young adulthood, and to smoking and lower physical activity.
2. Myocardial abnormalities will be associated with lower birth weight-for gestational age, lower weight in infancy, and faster BMI gain during late childhood. The associations with current cardiometabolic risk factors will be stronger in men and women who had lower birth or infant weight.
Ethics approval
1. Southampton University, 11/04/2016, ref: RE:18694
2. Indian Council of Medical Research, - 01/04/2016 , ref: No.50/7/TF-CVD/15-NCD-II
3. Christian Medical College, Vellore, 22/07/2015, ref: IRB No.9548 (OBSERVE)
4. Sundar lLal Jain Charitable Hospital, 13/08/2016, ref: SLJH/IEC/No.1
5. Health Ministry Screening Committee, New Delhi, India, 01/04/2016
Study design
Observational cohort study
Primary study design
Observational
Secondary study design
Cohort study
Trial setting
Community
Trial type
Prevention
Patient information sheet
Not available in web format, please use contact details to request a participant information sheet
Condition
Cardiovascular disease, Type 2 diabetes, Obesity
Intervention
The current study is an observational study that involves two birth cohorts (New Delhi and Vellore Birth Cohort) in India. Both the cohorts were established during 1969-1972. About 18,000 babies born in the area were measured at birth (weight, height) and subsequently followed up during infancy, childhood, adolescence and early adulthood, with record of weight and height at each time point and additionally for cardiovascular risk factors in early adulthood. The current IndEcho protocol targets about 3700 participants (from both cohorts) who have reached about 40 years of age.
Participants are visited at home by field workers, who explain the study, provide information sheets, and obtain written informed consent. Information on lifestyle factors (tobacco and alcohol consumption, diet, physical activity, occupation and socio-economic status) and medical history (including cardiac events and procedures since the last follow-up) are updated.
All participants are then invited for a clinic visit where detailed medical examination, anthropometric measurements (height, weight, waist circumference, hip circumference, skin fold thickness), body composition assessment (using Bioimpedance and/or DXA), hand grip strength assessment and cardiovascular status assessment using electrocardiography (ECG), echocardiography and carotid intima medial thickness measurements is taken. Additionally blood tests for glucose and insulin following oral glucose tolerance test, lipids and urine for protein are measured. Medical history and history of dietary habits, physical activity, socio-economic status are collected using standardised validated questionnaires.
The study is expected to last 36 months. This includes the time from recruitment of the first study participant to completion of the last participant. There is no involvement of the participant after their clinic visit for any other purpose related to the study. The period may also include the data analysis and publication of primary results if the recruitment is completed before the anticipated 36 months.
Intervention type
Behavioural
Phase
Drug names
Primary outcome measure
1. Left ventricular mass and indices of left ventricular systolic and diastolic function assessed by echocardiography at study visit
2. Carotid intima media thickness assessed using ultrasound at study visit
3. Ischemic changes in the heart as assessed by electrocardiogram (ECG) at study visit
Secondary outcome measures
1. Body composition as assessed by anthropometry, bioimpedance and dual energy X-ray absorptiometry (DXA) at study visit
2. Glucose intolerance and lipid disorders as assessed by biochemical tests at study visit
3. Socio-economic status as assessed by Standard of Living questionnaire at study visit
4. Dietary pattern as assessed by Food frequency questionnaire at study visit
5. Physical activity as assessed by Global Physical Activity Questionnaire (GPAQ) at study visit
6. Birth weight and early growth data (already collected during previous follow-ups and available in cohort database) at study visit
Overall trial start date
10/02/2015
Overall trial end date
30/10/2019
Reason abandoned (if study stopped)
Eligibility
Participant inclusion criteria
1. Males and females
2. Aged over 40 years
3. Previously participated in the New Delhi and Vellore Birth Cohorts
Participant type
Healthy volunteer
Age group
Adult
Gender
Both
Target number of participants
Target total recruitment of participants: 3700
Participant exclusion criteria
Individuals with history or on active treatment for chronic kidney disease or cancer.
Recruitment start date
01/11/2016
Recruitment end date
30/04/2019
Locations
Countries of recruitment
India
Trial participating centre
Sundar Lal Jain Charitable Hospital
Ashok Vihar Phase -III
New Delhi
110052
India
Trial participating centre
Christian Medical College
Vellore
632001
India
Trial participating centre
Sitaram Bhartia Institute for Science and Research
B-16
Qutab Institutional Area
New Delhi
110016
India
Trial participating centre
All India Institute of Medical Sciences
Ansari Nagar East
New Delhi
110029
India
Trial participating centre
Centre for Chronic Disease Control
4th Floor
Plot number 47
Sector 44
Gurgaon
122002
India
Sponsor information
Organisation
Southampton University
Sponsor details
MRC Lifecourse Epidemiology Unit
University of Southampton
Southampton General Hospital
Southampton
SO16 6YD
United Kingdom
Sponsor type
University/education
Website
Funders
Funder type
Charity
Funder name
British Heart Foundation
Alternative name(s)
BHF
Funding Body Type
private sector organisation
Funding Body Subtype
foundation
Location
United Kingdom
Results and Publications
Publication and dissemination plan
Results will be disseminated through scientific meetings and peer-reviewed journals. The first publication intended is the study protocol in a peer-reviewed journal (2017). Following completion of data collection (expected end of 2018) and cleaning, analysis related to specific research questions will begin. The results are likely to be published from mid 2019.
IPD sharing statement:
The datasets generated during and/or analysed during the current study are/will be available upon request from Professor Caroline Fall Email: chdf@mrc.soton.ac.uk
Intention to publish date
30/10/2020
Participant level data
Available on request
Basic results (scientific)
Publication list