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Repeat testing for pre-eclampsia does not lead to better outcomes for pregnant women, but a single test is still beneficial

2024-02-09
(Press-News.org) A single test to speed up diagnosis of a serious disease in pregnant women does not need to be repeated, new research has found.

Results from the PARROT-2 trial, published today in the Lancet by researchers from King’s College London and funded by Jon Moulton Charitable Trust, Tommy’s Charity and the National Institute for Health and Care Research, has ruled out the need for routine repeat placental growth factor-based testing (PIGF) for all women with suspected pre-eclampsia.

PARROT-2 is a large, multi-centre UK trial in 1,252 women with suspected preterm pre-eclampsia, a life-threatening condition for pregnant women, and their babies, that can lead to major complications, such as stillbirth and neonatal death, as well as longer hospital stays.

PIGF testing is a blood test that can detect levels of placental growth factor and soluble flt-1, which are biomarkers for pre-eclampsia. An abnormal result will identify those women and babies at higher risk of adverse outcomes, who need intensive surveillance, whilst a normal result means women can be safely discharged home to continue with normal antenatal care. Use of an initial test in pregnancy was rolled out across much of England in 2021.

The findings show that repeat testing enabled faster diagnosis of pre-eclampsia, but this did not translate into better outcomes for women or their babies.

Dr Alice Hurrell, first author of the study from King’s College London, said: “This large trial has major implications for policy, practice, and guidelines. Universal, routine repeat testing, as recommended by some international groups, is not supported by our findings. However, the clinical benefit of a one-off placental growth factor-based test when pre-eclampsia is first suspected, remains clear.”

Professor Lucy Chappell, NIHR Senior Investigator from King’s College London, said: “Pregnant women repeatedly tell us the value of having greater certainty on diagnosis. These trial results should further lower the barriers to widespread equitable adoption of initial placental growth factor-based testing, improving maternal health outcomes globally. With an estimated 5% of all women affected by preterm hypertension in pregnancy (around 7 million pregnancies worldwide), this is now a pivotal time to ensure that placental growth factor-based testing can reach widespread implementation across healthcare settings.”

Marcus Green, CEO of Action on Pre-eclampsia, said: “These are really important findings showing that once the first test has been done, there is nothing to be gained from further testing. A single test can assure women with certainty if they are likely or unlikely to get pre-eclampsia. We look forward to completion of roll-out of placental growth factor-based testing across England, with an urgent call for implementation in the devolved administrations across all four nations. These new results also provide a timely opportunity to tackle the higher burden of adverse outcomes due to pre-eclampsia in global settings.”

Kath Abrahams, Chief Executive of Tommy’s, said: “This important study funded by Tommy’s is a significant and positive step forwards in the drive to reduce the harm caused by pre-eclampsia.

“Following the breakthrough made by the previous Tommy’s funded PARROT study, we hope it will pave the way for PlGF testing for all women and birthing people who are thought to be at risk of pre-eclampsia, so that those most in need can be offered vital extra monitoring and support.”

ENDS

NOTES TO EDITORS:

Professor Lucy Chappell is Chief Scientific Adviser to the Department of Health and Social Care and CEO of the NIHR.

About King’s College London   

King’s College London is amongst the top 40 universities in the world and top 10 in Europe (THE World University Rankings 2024), and one of England’s oldest and most prestigious universities.  With an outstanding reputation for world-class teaching and cutting-edge research, King’s maintained its sixth position for ‘research power’ in the UK (2021 Research Excellence Framework).     

King's has more than 33,000 students (including more than 12,800 postgraduates) from some 150 countries worldwide, and 8,500 staff.   

For nearly 200 years, King’s students and staff have used their knowledge and insight to make a positive impact on people, society and the planet. Focused on delivering positive change at home in London, across the UK and around the world, King’s is building on its history of addressing the world’s most urgent challenges head on to accelerate progress, make discoveries and pioneer innovation. Visit the website to find out more about Vision 2029, which sets out bold ambitions for the future of King’s as we look towards our 200th anniversary.  

World-changing ideas. Life-changing impact: kcl.ac.uk/news   

About Tommys

We’re Tommy’s, the leading charity that exists to stop the heartbreak and devastation of baby loss and make pregnancy and birth safe – for everyone. To do this, we work across the whole pregnancy journey to drive change at every level – translating our research breakthroughs into new tests and treatments in clinical care, changing national maternity policy and providing expert information and support for anyone who needs it. Together, with the strength of our community, we’re saving babies’ lives.

 

END


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[Press-News.org] Repeat testing for pre-eclampsia does not lead to better outcomes for pregnant women, but a single test is still beneficial