Length of stay in neonatal ICU can affect behavior of premature babies

November 30, 2017

A study conducted by researchers at the University of São Paulo's Ribeirão Preto School of Medicine (FMRP-USP) in Brazil, with support from the Sao Paulo Research Foundation - FAPESP , indicates that length of stay in the ICU is the factor that best explains some preterm babies' behavioral problems relating to emotional regulation, regardless of the degree of prematurity and the presence of bronchopulmonary dysplasia and retinopathy of prematurity (ROP).

According to the research, whose results were published in the journal Early Human Development, neonatal pain and stressful experiences can impair both early and later child development.

"Moreover, the neonatal ICU environment includes other factors that impair child development, such as high levels of noise and luminosity, repetitive tactile stimuli, and maternal separation", the authors write.

The sample population consisted of 100 preterm babies aged 18-36 months with differing levels of prematurity. The aim of the study was to find out how neonatal and socio-demographic factors influence early-childhood temperament and behavior. All the infants were born in FMRP-USP's hospital and enrolled in a multidisciplinary intervention program in its neonatal ICU. A number of tests were applied to evaluate temperament, stress and behavior, leading to scores for the relevant indicators.

Predictors of behavioural patterns in adulthood

The researchers' study of 100 preterm babies showed that longer stays in the neonatal ICU were a risk factor for behavioral problems.

According to Maria Beatriz Martins Linhares, an associate professor at FMRP-USP and principal investigator for the study, early childhood is a window of opportunity for regulation of the individual's lifelong development.

"Initial physiological and emotional regulation lays a foundation for several behavioral regulation processes," she said. "For this reason, it is important to recall that neonatal and childhood behavioral problems can point to the risk of behavioral problems in adulthood. These can potentially be prevented in the window between birth and about six years of age."

The self-regulation process is completed by the age of five, starting with emotional regulation up to the age of approximately 18 months and followed by behavioral regulation.

"Self-control emerges at around three or four years of age, with development of the executive attention system, which is relevant to effortful control, enhancing the potential for behavior regulation," the authors write.

Temperament changes during the course of development. With typical child development, therefore, "systems that are initially more reactive become increasingly regulated to the extent that the inhibition control systems directed toward fear and attention control become more mature", according to the authors.

Linhares sublinha que o desenvolvimento cognitivo envolve não só o crescimento físico e as habilidades - nas áreas de linguagem, locomoção, motora -, mas também os aspectos afetivos, sociais e comportamentais. "Portanto, da mesma forma que o desenvolvimento motor precisa ser acompanhado, os indicadores do comportamento e traços do temperamento também devem ser", disse Linhares.

Linhares stresses that cognitive development involves not only physical growth and language and motor skills; it also has affective, social and behavioral aspects. "Not only motor development but also behavioral indicators and temperamental traits should be monitored."

Recommendations of the study

According to the World Health Organization (WHO), Brazil has the world's tenth-highest rate of premature births.

However stressful a neonatal ICU may be for babies - considering some painful procedures which ensure weight gain and proper oxygenation for the infant (a premature baby's lungs are not yet fully formed) - they simply cannot survive without the support of the equipment and the multiprofessional team of specialists found there.

The researchers say this finding confirms the need for developmental care programs in ICUs to reduce stressful and painful experiences for newborn infants and also to enhance protective strategies during their early development.

Methodology

Mothers of these babies who met the criteria for inclusion, which included understanding the instrument used to report their infant's behavior, participated in interviews and responded to questionnaires.

Babies with grade 3 or 4 intracranial hemorrhage, limited mobility or cognitively impaired mothers were excluded. Thirty-six had bronchopulmonary dysplasia, and 63 had ROP, the most common diseases among preterm babies.

"Previous studies compared preterm and term babies, given that preterm babies are more likely to display behavioral problems. Our study advances knowledge of development in preterm babies. There are risks, but if we identify the risks, we can plan strategies for protection, prevention and intervention to improve the development of these children," said Rafaela Guilherme Monte Cassiano, a psychologist and PhD researcher in FMRP-USP's Department of Neurosciences & Behavioral Sciences and one of the authors of the study.
-end-
About São Paulo Research Foundation (FAPESP)

The São Paulo Research Foundation (FAPESP) is a public institution with the mission of supporting scientific research in all fields of knowledge by awarding scholarships, fellowships and grants to investigators linked with higher education and research institutions in the State of São Paulo, Brazil. FAPESP is aware that the very best research can only be done by working with the best researchers internationally. Therefore, it has established partnerships with funding agencies, higher education, private companies, and research organizations in other countries known for the quality of their research and has been encouraging scientists funded by its grants to further develop their international collaboration. For more information: http://www.fapesp.br/en.

Fundação de Amparo à Pesquisa do Estado de São Paulo

Related Behavior Articles from Brightsurf:

Variety in the migratory behavior of blackcaps
The birds have variable migration strategies.

Fishing for a theory of emergent behavior
Researchers at the University of Tsukuba quantified the collective action of small schools of fish using information theory.

How synaptic changes translate to behavior changes
Learning changes behavior by altering many connections between brain cells in a variety of ways all at the same time, according to a study of sea slugs recently published in JNeurosci.

I won't have what he's having: The brain and socially motivated behavior
Monkeys devalue rewards when they anticipate that another monkey will get them instead.

Unlocking animal behavior through motion
Using physics to study different types of animal motion, such as burrowing worms or flying flocks, can reveal how animals behave in different settings.

AI to help monitor behavior
Algorithms based on artificial intelligence do better at supporting educational and clinical decision-making, according to a new study.

Increasing opportunities for sustainable behavior
To mitigate climate change and safeguard ecosystems, we need to make drastic changes in our consumption and transport behaviors.

Predicting a protein's behavior from its appearance
Researchers at EPFL have developed a new way to predict a protein's interactions with other proteins and biomolecules, and its biochemical activity, merely by observing its surface.

Spirituality affects the behavior of mortgagers
According to Olga Miroshnichenko, a Sc.D in Economics, and a Professor at the Department of Economics and Finance, Tyumen State University, morals affect the thinking of mortgage payers and help them avoid past due payments.

Asking if behavior can be changed on climate crisis
One of the more complex problems facing social psychologists today is whether any intervention can move people to change their behavior about climate change and protecting the environment for the sake of future generations.

Read More: Behavior News and Behavior Current Events
Brightsurf.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.