Overview

This trial is active, not recruiting.

Conditions pre-eclampsia, obesity, raised lipids, high blood pressure, insulin resistance
Treatments targeted esteem diet, non-randomised cohort
Sponsor Queen Mary University of London
Start date July 2014
End date August 2016
Trial size 3439 participants
Trial identifier NCT02218931, 009337QM, 732/2029

Summary

Obesity is a growing problem in East London and every other woman who enters pregnancy is obese or overweight. In addition to obesity, other metabolic risk factors such as raised lipids, high blood pressure and diabetes increase pregnancy related complications such as preeclampsia and long term problems such as heart diseases, stroke and death. Preeclampsia, presenting as hypertension and proteinuria is a leading cause of maternal and fetal mortality and morbidity. Interventions that reduce cardiovascular events by modifying risk factors also have the potential to reduce the risk of preeclampsia. The investigators work funded by the National Institute of Health Research (NIHR) in the UK showed that dietary interventions in obese pregnant women may reduce the risk of preeclampsia. The investigators propose to show that pregnant women with metabolic risk factors derive the most benefit from a simple, targeted intervention based on Mediterranean dietary pattern to prevent pre-eclampsia. Women with the risk factors (1092 women) will be randomly allocated to dietary intervention or usual antenatal dietary advice and the risk of preeclampsia will be evaluated. The remaining eligible women who are consented for lipid tests will be followed up for outcome data only. Diet based interventions, especially those based on a Mediterranean dietary pattern has a potential to reduce the risk of preeclampsia. In the investigators study, pregnant mothers with risk factors will be randomly allocated to either a dietary invention or usual antenatal care and they will assess the risk of preeclampsia. The investigators will tailor the intervention to suit the individual needs of the mother and provide nuts and olive oil to improve compliance. The study will be undertaken across the three maternity units at Barts Health NHS Trust, which delivers 17,000 women/year. The study is supported by the office of the Mayor of Tower Hamlets which will facilitate the involvement of grassroots workers to promote recruitment and uptake of the intervention.

United States No locations recruiting
Other Countries No locations recruiting

Study Design

Allocation randomized
Endpoint classification safety/efficacy study
Intervention model parallel assignment
Masking open label
Primary purpose prevention
Arm
(Experimental)
The ESTEEM dietary pattern is similar to that in a Mediterranean diet associated with reduced risk of pre-eclampsia. The intervention will include structured meal plans and grocery lists, recipes for healthy diet and appropriate choices at restaurants
targeted esteem diet
The key components of the diet are: High intake of vegetables, nuts, non-refined grains, legumes and fruits;Moderate to high consumption of fish;Small to moderate intake of poultry and dairy products such as yoghurt and cheese;Low consumption of red meat and processed meat and avoidance of sugary drinks, fast food and high fat food;High fibre;Intake of nuts including walnuts and almonds that are rich sources of monounsaturated and polyunsaturated fatty acids (30 g/day);Olive oil to cook and dress salads as the main source of fat (0.5 l/week) The intervention will include structured meal plans and grocery lists, recipes for healthy diet and appropriate choices at restaurants
(No Intervention)
The control group will be provided the usual antenatal dietary advice. This includes advice on healthy and physical activity in women with normal weight and obesity and overweight. Folic acid and vit D supplementation are provided as per national recommendations. Participants will provide outcome data at point of delivery and food frequency questionnaire at baseline and 36 weeks or delivery depending on which is sooner.
(Other)
Non-randomised cohort of women with no metabolic risk factors will be followed up to delivery to collect outcome data
non-randomised cohort
Non-randomised cohort of women with no metabolic risk factors will be followed up to delivery to collect outcome data

Primary Outcomes

Measure
Number of participants with a diagnosis of pre-eclampsia
time frame: At delivery

Secondary Outcomes

Measure
Number of participants with adverse maternal outcomes:
time frame: At delivery
Number of participants with adverse fetal outcomes:
time frame: At delivery
Measure of dietary outcomes in recruited participants
time frame: Baseline and 36 weeks or delivery depending on which is sooner
Measure of laboratory outcomes
time frame: 36 weeks of gestation or at delivery whichever is the earliest

Eligibility Criteria

Female participants at least 16 years old.

Inclusion Criteria: Pregnant women less than 18 weeks of gestation with at least one of the following: i. BMI ≥30 Kg/m2 ii. Raised serum triglycerides ≥1.7 mmol/l iii. Raised blood pressure of systole ≥140 mm Hg or diastole ≥90 mm Hg Exclusion Criteria: i. BMI <18.5 Kg/m2or ≥40 Kg/m2 ii. Women on lipid altering drugs iii. History of diabetes iv. Chronic renal disease v. Auto immune disease vi. Multiple pregnancy vii. Poor understanding of written and spoken English viii. Not able to follow Mediterranean diet for religious or other reasons ix. <16 years of age x. Not able to consume nuts or extra virgin olive oil

Additional Information

Official title Effect of Simple, Targeted Diet in Pregnant Women With Metabolic Risk Factors on Pre-eclampsia (ESTEEM): A Randomised Trial
Principal investigator Shakila Thangaratinam
Description Obesity is a growing problem in east London with a fifth of women entering pregnancy as obese. In addition to obesity, other metabolic risk factors such as raised lipids, high blood pressure and insulin resistance are increasingly prevalent. With a large proportion of ethnic minority mothers in east London, dietary habits and underlying genetic predisposition are major contributors to this phenomenon. Obesity and raised serum lipids, especially triglycerides increase the risk of complications such as preeclampsia in pregnancy and cardiovascular events such as myocardial infarction, stroke and death in the long term. Preeclampsia, a condition in pregnancy, with raised blood pressure and increased protein in the urine is a leading cause of maternal and fetal deaths. Its treatment gives rise to large health care costs. Preeclampsia contributes to preterm birth, one of the leading causes of perinatal deaths in east London. It accounts for 65% of neonatal deaths and 50% of neurological disability in childhood. Around £900 million in extra costs for care of preterm babies per year in the NHS are linked to neonatal care. Preeclampsia, characterised by insulin resistance, widespread endothelial damage and dysfunction, coagulation defects and increased systemic inflammatory response, shares metabolic risk factors with cardiovascular disease. Obesity, dyslipidaemia and hypertension are independent risk factors for pre-eclampsia. Interventions that reduce cardiovascular events by modifying metabolic risk factors also have the potential to reduce the risk of pre-eclampsia. Early identification of mothers at risk of preeclampsia will allow clinicians to deliver these targeted interventions in pregnancy, with the potential to prevent preeclampsia and modify cardiovascular risk in the long-term. Currently, low dose aspirin, recommended as a prophylactic measure reduces preeclampsia risk by only 10%. Simple, low-cost and effective acceptable interventions are required to reduce this risk further. Dietary interventions in pregnant women with metabolic risk factors such as obesity and insulin resistance are shown to reduce the risk of preeclampsia. But the existing studies are of poor quality and do not evaluate preeclampsia as the primary outcome. Furthermore, they focus on specific components of the diet, rather than modifying the overall dietary pattern. Mediterranean diet with high consumption of vegetables and fruits, olive oil and nuts and low consumption of red meat and processed food significantly reduces lipid levels and cardiovascular adverse events in non-pregnant high risk population. In pregnancy, the beneficial effect of the Mediterranean dietary pattern was observed in a large prospective study of nulliparous pregnant women with a 28% reduction in the risk of preeclampsia (RR 0.72; 95% CI 0.62, 0.85). These results need confirmation in a sound experimental study. There is a need for an adequately powered randomised trial to evaluate the beneficial effect of lipid modifying diet in pregnancy that is simple, accessible and acceptable. The investigators hypothesis is that pregnant women with metabolic risk factors will derive benefit from dietary intervention in preventing pre-eclampsia.
Trial information was received from ClinicalTrials.gov and was last updated in June 2016.
Information provided to ClinicalTrials.gov by Queen Mary University of London.