Conference to learn of new study tomorrow in Auckland
Supplied Content (Edited)
University of Auckland, March 26, 2018
The survival rates of babies with a rare but potentially fatal heart defect is lower for Pacific and Maori compared to European babies, a new research has found.
The Researchers say it is another example of inequity in health outcomes that raises the question of whether methods of healthcare provision contribute to these different outcomes.
The Study also showed that babies of European ethnicity were more likely than other ethnicities to have the condition, called ‘Congenital Critical Left Heart Obstruction’ (LHO), in which the left side of babies’ hearts does not form properly.
Liggins Institute Researcher, Neonatologist and PhD Student Dr Elza Cloete will present the new findings tomorrow (Tuesday) at a major gathering of international mother and baby researchers and health professionals in Auckland at the Perinatal Society of Australia and New Zealand (PSANZ) Annual Scientific Congress 2018.
Statistics analysed
Dr Cloete analysed New Zealand health statistics on the condition over a nine-year period as part of her PhD, working with her supervisors Liggins Institute Director and Starship Hospital Neonatologist Professor Frank Bloomfield and Dr Tom Gentles and Starship Hospital National Paediatric Cardiac Service Director Dr Ton Gentles.
They found that (a) The incidence of LHO was highest in European fetuses and babies (0.59 per 1,000), followed by Maori (0.31 per 1000) and then Pacific (0.27 per 1,000). Across all ethnicities, it was 0.43 per 1,000 (b) Management options taken during pregnancy and shortly after birth varied among ethnic groups. Higher pregnancy termination rates were found in Europeans, but more stillbirths and higher palliative care rates were recorded for Maori and Pacific; and (c) Survival to one year was highest in European babies at 58%, compared to 44% for Maori and 41% for Pacific.
Maternal Health inequities
Dr Cloete said, “Ministry of Health figures clearly show that Maori and Pacific families experience inequities across maternal health and access to care – true across the broader health care sector. Despite that, I do not think that we were anticipating these results. The differences in perinatal outcomes in particular is quite striking.”
She said that there is probably a combination of reasons for these differences.
“We know that Pacific families seek out antenatal care later in pregnancy compared to other ethnic groups. In addition, how a particular mother and baby are cared for at each step will be influenced by the cultural and religious beliefs of the family, as well as by their health literacy,” Dr Cloete said.
Other influencing factors
Where families live and their ability to travel to the country’s paediatric cardiac intervention centre at Starship Hospital could also influence outcomes, as could differences in socioeconomic status, health literacy and disease severity.
Healthcare providers’ bias
Dr Cloete said that the possibility of healthcare provider bias should also be considered.
“Much has been written about unconscious bias in medicine. When health professional counsel families, we may guide them towards the decision that we think is appropriate for them based on our own bias, rather than present them with all the options that will allow them to make the best decision for their family. Those biases may be shaped by our own religious beliefs, cultural awareness, and societal influences – how ethnic groups are portrayed – or perhaps previous experiences,” she said.
Genetic components
On the other hand, differences in the incidence of these heart defects suggests a genetic component. “We know that the risk of LHO is higher among close relatives of an affected person,” Dr Cloete said.
According to Dr Gentles, although the condition is rare, it affects families profoundly.
“These types of conditions are very difficult for families to cope with and adjust to. Making a diagnosis during pregnancy places a great deal of stress on mothers and families, but it does mean that families are aware of treatment options at an early stage,” he said.
“If a diagnosis is not made before birth babies become very sick. They may die before they can be treated, their recovery may be much more complicated and prolonged, and of course their family will be in shock given the unexpected events,” he added.
Dedicated Team
In the past year, Starship has introduced a dedicated team that works closely with healthcare services around New Zealand to monitor and support caregivers of babies with LHO. Early results suggest that this initiative has improved survival in these fragile infants.
Dr Cloete wants further research to understand the disparities, not only in cardiac defects, but other congenital conditions or syndromes diagnosed during pregnancy.
“Families should be supported to make the decision that they believe is best for their child. As healthcare professionals, we have an obligation to present the information to them in an unbiased way,” she said.
The study is part of a larger body of work that the team is doing towards establishing a nationwide Pulse Oximetry Screening Programme for the detection of critical heart defects in newborns.
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Tags: Maori, Pacific, Liggins Institute, Frank Bloomfield, Dr Tom Gentles, Dr Elza Cloete
