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Antenatal steroids may increase risk of NICU admission, hypoglycaemia and reduced anthropometric measurements among newborns
USA:Results from two new studies highlight that early exposure to steroids was associated with increased risks of admission to neonatal intensive care, intubation, hypoglycaemia requiring treatment, reduced anthropometric measurements, and increased long term neurodevelopmental or cognitive risks. Therefore there was a need for doctors to be aware of the potential and to take caution while considering antenatal steroid treatment in women at risk of giving early birth.
The studies published in The BMJ examined the potential health risks for infants of giving steroid drugs to women who are at risk of giving birth early. They highlighted the challenge of preventive treatments in fetal and neonatal medicine and should remind clinicians and parents that there is no such thing as a risk-free drug.
Babies born early (preterm) carry a greater risk of death and serious complications such as breathing difficulties, bleeding into the brain, and infection than babies born at term. These problems tend to be more severe the earlier the baby is born.
Corticosteroids are known to help increase the chance of a baby born early surviving and having fewer health problems. Ideally, they should be given before 34 weeks of pregnancy and within approximately one week of birth. But their effects on later childhood health are less well understood, particularly when the administration is “mistimed” and infants are born at term.
Two studies set out to fill this knowledge gap.
The first is based on data from the National Health Insurance Research Database (NHIRD) in Taiwan for nearly 2 million children born between 2008 and 2019. It shows that exposure to antenatal corticosteroids compared with no exposure is associated with an increased risk of serious infection, including sepsis and pneumonia, during the first 12 months of life.
Further analyses suggest the increase in the risk of serious childhood infection is greater for infants born at term than for those born preterm.
The authors acknowledge that these are observational findings so no firm conclusions can be drawn about cause and effect, and that further investigation is needed to replicate the findings in other populations.
However, they say: “Clinicians need to be aware of the increased risk of rare but serious infection among children exposed to antenatal corticosteroids.”
The second study, based on data from seven randomised controlled trials and 10 population studies involving 1.6 million infants born since 2000, shows that around 40% of infants treated with antenatal corticosteroids are born at term.
For these children, exposure to antenatal corticosteroids was associated with an increased risk of short and long-term health issues, such as admission to neonatal intensive care, breathing problems, and reduced growth.
Again, the researchers recognise that drawing firm conclusions about the impact of antenatal corticosteroids on later health is difficult as findings were mainly from observational studies, with low or very low certainty evidence and more follow-up of randomised studies is important.
Nevertheless, they say caution might be warranted when using antenatal corticosteroids. And they call for better prediction tools for preterm birth and enhanced criteria for the administration of antenatal corticosteroids, along with a less liberal approach to the use of antenatal corticosteroids.
Despite the limitations of these papers, some tentative conclusions can still be drawn that may influence clinical practice, say specialist neonatal doctors in a linked editorial.
For example, they say reducing the frequency of mistimed antenatal corticosteroid administration should remain a focus for all health professionals working in this area, and emphasise the need for further high-quality data investigating longer-term outcomes in children who were exposed to mistimed antenatal corticosteroids.
They also point out their professional duty to fully counsel parents about the benefits as well as potential harms of any proposed treatment that could affect their offspring.
Finally, they say these studies “highlight the challenge of preventive treatments in fetal and neonatal medicine and should remind clinicians and parents that there is no such thing as a risk-free drug.”
Dr Kamal Kant Kohli-MBBS, DTCD- a chest specialist with more than 30 years of practice and a flair for writing clinical articles, Dr Kamal Kant Kohli joined Medical Dialogues as a Chief Editor of Medical News. Besides writing articles, as an editor, he proofreads and verifies all the medical content published on Medical Dialogues including those coming from journals, studies,medical conferences,guidelines etc. Email: drkohli@medicaldialogues.in. Contact no. 011-43720751