Language and hearing outcomes of preterm infants

Parental impact during and after neonatal intensive care admission

Parents play a pivotal role in neurodevelopmental outcomes of their children in the neonatal intensive care unit (NICU) and beyond. Integration of parents in clinical care and research is synergistic. Engaged parents yield more comprehensive clinical care and more robust and meaningful research products. Subsequently, successful clinical and research efforts improve outcomes for children. We review strategies for parental integration into NICU clinical care and research, including parental involvement in therapeutic interventions and neurodevelopmental care, and effective communication strategies for clinicians and researchers. We discuss challenges in neonatal trials and emphasize the need for building a culture of research, collaborative partnerships with patient advocacy organizations, and ongoing support beyond the NICU. Overall, we call for recognizing and fostering the impactful role of parents as teammates with clinicians and researchers in optimizing neurodevelopmental outcomes in the NICU and beyond.

Social determinants of health and language outcomes in preterm infants with public and private insurance

OBJECTIVE

To evaluate associations of maternal social determinants of health (SDOH) with language outcomes of preterm infants with public and private insurance.

STUDY DESIGN

Single center study of 375 neonates born ≤ 28 weeks. Perinatal characteristics were collected, and the Bayley III was administered at 18-24 months. Primary outcome was language scores of <85. Bivariate and multivariable analyses were used to compare groups.

RESULTS

Mothers with public insurance had higher rates of psychosocial risk factors. In regression analysis, People of Color (aOR 2.4, 1.47-4.04), non-English speaking household (aOR 4.05, 1.47-11.15) and public insurance (aOR 2.03, 1.18-3.49) significantly increased the odds of having a language composite score of <85, whereas breast milk (aOR 0.47, 0.28-0.79) was protective.

CONCLUSIONS

Preterm infants with public insurance are at increased risk of exposure to multiple SDOH which are independently associated with language delay at 18-24 months.

Sensorineural hearing impairment among preterm children: a Norwegian population-based study

OBJECTIVE

To investigate the risk for sensorineural hearing impairment (SNHI) in preterm infants, and to what extent the risk is attributed to perinatal morbidities and therapies.

DESIGN

Population-based cohort study using data from several nationwide registries.

SETTING

Norwegian birth cohort 1999-2014, with data on SNHI until 2019.

PARTICIPANTS

60 023 live-born preterm infants, divided in moderate-late preterm (MLP) infants (32-36 weeks), very preterm (VP) infants (28-31 weeks) and extremely preterm (EP) infants (22-27 weeks), and a reference group with all 869 797 term-born infants from the study period.

MAIN OUTCOME MEASURES

SNHI defined by selected ICD-10 codes, recorded during minimum 5-year observation period after birth.

RESULTS

The overall SNHI prevalence in the preterm cohort was 1.4% compared with 0.7% in the reference group. The adjusted risk ratios (95% CIs) for SNHI were 1.7 (1.5-1.8) in MLP infants, 3.3 (2.8-3.9) in VP infants and 7.6 (6.3-9.1) in EP infants. Among EP infants, decreasing gestational age was associated with a steep increase in the risk ratio of SNHI reaching 14.8 (7.7-28.7) if born at 22-23 weeks gestation. Among the VP and MLP infants, mechanical ventilation and antibiotic therapy had strongest association with increased risk of SNHI, but infants not receiving these therapies remained at increased risk. Among EP infants intracranial haemorrhage increased the already high risk for SNHI. We found no signs of delayed or late-onset SNHI in preterm infants.

CONCLUSION

Preterm birth is an independent risk factor for SNHI. Invasive therapies and comorbidities increase the risk, predominantly in infants born after 28 weeks gestation.

A Randomized Controlled Trial of a Neonatal Intensive Care Unit Language Intervention for Parents of Preterm Infants and 2-Year Language Outcomes

OBJECTIVE

To test whether a neonatal intensive care unit-based language curriculum for families with preterm infants enhances the language environment and postdischarge Bayley Scales of Infant and Toddler Development (BSID)-III language and cognitive scores.

METHODS

A randomized controlled trial was conducted with infants born at ≤32 weeks assigned to a parent-driven language intervention or health-safety lessons (controls). Recordings of adult word counts (AWC), conversational turns, and child vocalizations were captured at 32, 34, and 36 weeks. Primary outcomes included 2-year BSID-III language and cognitive scores.

RESULTS

We randomized 95 infants; 45 of the 48 intervention patients (94%) and 43 of the 47 controls (91%) with ≥2 recordings were analyzed. The intervention group had higher AWCs (rate ratio, 1.52; 95% CI, 1.05-2.19; P = .03) at 36 weeks, increased their AWCs between all recordings, and had lower rates of 2-year receptive language scores <7 (10% vs 38%; P < .02). The intervention was associated with 80% decreased odds of a language composite score of <85 (aOR, 0.20; 95% CI, 0.05-0.78; P = .02), and 90% decreased odds of a receptive score of <7 (0.10; 95% CI, 0.02-0.46; P = .003); there was no association found with cognitive scores. Increases in AWC and conversational turns between 32 and 36 weeks were independently associated with improved 2-year BSID-III language scores for both study groups.

CONCLUSIONS

Short-term parent-driven language enrichment in the neonatal intensive care unit contributes to increased AWCs at 36 weeks and improved 2-year language scores. In adjusted analyses, increases in conversational turns and AWCs at 36 weeks were independently associated with improved language scores. This low-cost, easily implemented intervention can potentially help to mitigate speech delays among preterm infants.

TRIAL REGISTRATION

Registered with www.

CLINICALTRIALS

gov, NCT02528227.

Hearing Loss and Risk Factors in Very Low Birth Weight Infants

The incidence of sensorineural hearing loss (SNHL) is still high in very low birth weight (VLBW) infants. The purpose of our study was to provide the prevalence rates of SNHL and to analyze the risk factors of hearing impairment and changes in hearing thresholds in a cohort of VLBW infants. A retrospective observational study was conducted in our neonatal intensive care unit (NICU) from 2012 to 2016. All VLBW infants included were screened by transient evoked otoacoustic emissions (TEOAEs) and diagnostic auditory brainstem response (ABR). In total, we enrolled 316 infants and SNHL was diagnosed in 68, leading to an early incidence of 21.5% as 36 infants out of 68 improved. Finally, SNHL was confirmed in 20 patients (6.3%) who needed hearing aids. They were significantly smaller, sicker, had longer hospitalizations, and received more ototoxic therapies. Logistic regression analysis showed that gestational age (GA) influenced the association between drugs and SNHL. The results underlined how the total exposure to antibiotics is significantly associated with SNHL, even after GA correction. In conclusion, GA, birth weight and, above all, the length and complexity of NICU stay quantify the risk of SNHL and should be considered at the individual level for parent counseling.

Language Exposure for Preterm Infants is Reduced Relative to Fetuses

OBJECTIVE

To assess changes and deficits in language and auditory exposures consequent to preterm birth and neonatal intensive care unit stay compared with exposures in utero among typically developing fetuses.

STUDY DESIGN

We analyzed over 23 000 hours of auditory exposure data in a cohort study of 27 typically-developing fetuses and 24 preterm infants. Extrauterine exposures for fetuses were captured by having pregnant women wear 24-hour audio recording devices. For preterm infants, recording devices were placed in the infant's crib. Multilevel linear regressions were conducted to test for group differences and effects of infant sex, maternal education, and mother' occupation. A linear mixed-effects model was used to test for an effect of speaker gender.

RESULTS

Fetuses were exposed to an estimated 2.6 ± 1.8 hours/day of nearby, predominantly female language, nearly 5 times greater than 32 ± 12 minutes/day estimated for preterm infants (P < .001). Preterm infants had greater daily exposure to electronic sounds (5.1 ± 2.5 vs 1.3 ± 0.6 hours; P < .001) and noise (4.4 ± 2.1 vs 2.9 ± 2.8 hours; P < .05), with 4.7 ± 3.9 hours/day of silence. Language and extrauterine sound exposure for fetuses showed a marked day/night cyclical pattern, with low exposure during nighttime hours, but preterm infants' exposures showed significantly less change across the 24-hour cycle (P < .001). Maternal occupation requiring frequent communication predicted greater language exposure (P < .05).

CONCLUSIONS

Our findings provide the first comparison of preterm infant auditory exposures to typically-developing fetuses. Some preterm infants may incur deficits of over 150 hours of language exposure over the preterm period. Given known effects of prenatal/preterm language exposure on neurobehavioral outcomes, this magnitude of deficit is alarming.

Neurodevelopmental, Mental Health, and Parenting Issues in Preterm Infants

The World Health Organization in its recommendations for the care of preterm infants has drawn attention to the need to address issues related to family involvement and support, including education, counseling, discharge preparation, and peer support. A failure to address these issues may translate into poor outcomes that extend across the lifespan. In this paper, we review the often far-reaching impact of preterm birth on the health and wellbeing of the parents and highlight the ways in which psychological stress may have a negative long-term impact on the parent-child interaction, attachment, and the styles of parenting. This paper addresses the following topics: (1) neurodevelopmental outcomes in preterm infants, including cognitive, sensory, and motor difficulties, (2) long-term mental health issues in premature infants that include elevated rates of anxiety and depressive disorders, autism, and somatization, which may affect social relationships and quality of life, (3) adverse mental health outcomes for parents that include elevated rates of depression, anxiety, and symptoms of post-traumatic stress, as well as increased rates of substance abuse, and relationship strain, (4) negative impacts on the parent-infant relationship, potentially mediated by maternal sensitivity, parent child-interactions, and attachment, and (5) impact on the parenting behaviors, including patterns of overprotective parenting, and development of Vulnerable Child Syndrome. Greater awareness of these issues has led to the development of programs in neonatal mental health and developmental care with some data suggesting benefits in terms of shorter lengths of stay and decreased health care costs.

Parent and staff perspectives on the benefits and barriers to communication with infants in the neonatal intensive care unit

Exposure to high quantity and quality of language in the neonatal period is critical to neurocognitive development; however, Neonatal Intensive Care Unit (NICU) environments may contribute to language deprivation. Using qualitative thematic content analysis, this study aimed to characterize the knowledge and attitudes of NICU staff and patient families toward the importance of early language experience, the current NICU language environment, and the benefits and barriers of communication in the NICU. Results revealed that all respondents recognized the importance of communication for optimal cognitive development, though few understood why. Staff and family members alike recognized the role of nurses as coaches and role models in promoting communication at the bedside. Nurses generally felt that family members communicate less with their babies than family members themselves perceived, and that cell phone use has fewer communicative advantages than parents perceive. Respondents reported that patient illness, lack of time, and intimidating equipment all raise barriers to communication. These findings yield important considerations for developing educational interventions to improve NICU language environments, including a synergistic, dual focus on both staff and families. Communication in the NICU is a low cost, feasible, and accessible target with aims of ensuring optimal neurocognitive development for at-risk children.

Effect of biomedical complications on very and extremely preterm children's language

Introduction

Very and extremely preterm children have been found to show delays in the development of language in early years. In some investigations, however, a rigorous control of biomedical complications, such as Periventricular Leukomalacia (PVL), Intraventricular Hemorrhage (IVH) or Bronchopulmonary Dysplasia (BPD), does not always exist. For that reason, a confounding effect of low gestational age and biomedical complications may lead to erroneous conclusions about the effect of gestational age.

Methods

In this investigation we compare language development [use of words, sentence complexity and mean length of the three longest utterances (MLU3)] of three groups of Chilean children at 24 months of age (corrected age for preterm children). The first group was composed of 42 healthy full-term children (Full term group: FT), the second group of 60 preterm children born below 32 gestational weeks without medical complications (low risk preterm group: LRPT), and the third group was composed of 64 children below 32 gestational weeks who had medical complications (High risk preterm group: HRPT). The three groups were similar in terms of gender distribution, maternal education, and socio-economic environment. The instrument used to assess language was the Communicative Development Inventories (CDI). In addition, the Ages and Stages Questionnaire-3 (ASQ-3) was also used to assess other developmental dimensions.

Results

The results indicate that HRPT and LRPT children obtained significantly lower results than the FT group in the three language measures obtained through the CDI. No significant differences were observed between the HRPT and the LRPT groups, although the HRPT obtained the lowest results in the three CDI measures. The results obtained through the administration of the ASQ-3 confirm the delay of both preterm groups in communicative development when compared to the FT group. No significant differences between the FT and the PT groups were observed in gross motor, fine motor and problem solving dimensions of the ASQ-3. The LRPT group obtained results that were significantly higher than those of the FT group and the HRPT group in gross motor development.

Discussion

These results seem to indicate that the area of language development is particularly influenced by very or extremely low gestational age.

Neurodevelopmental outcome of Italian preterm ELBW infants: an eleven years single center cohort

BACKGROUND

Preterm extremely low birth weight infants (ELBWi) are known to be at greater risk of developing neuropsychiatric diseases. Identifying early predictors of outcome is essential to refer patients for early intervention. Few studies have investigated neurodevelopmental outcomes in Italian ELBWi. This study aims to describe neurodevelopmental outcome at 24 months of corrected age in an eleven-year single-center cohort of Italian ELBWi and to identify early risk factors for adverse neurodevelopmental outcomes.

METHODS

All infants born with birth weight < 1000 g and admitted to the Neonatal Intensive Care Unit of the "Fondazione IRCCS Policlinico San Matteo" hospital in Pavia, Italy, from Jan 1, 2005 to Dec 31, 2015 were eligible for inclusion. At 24 months, Griffiths' Mental Developmental Scales Extended Revised (GMDS-ER) were administered. Neurodevelopmental outcome was classified as: normal, minor sequelae (minor neurological signs, General Quotient between 76 and 87), major sequelae (cerebral palsy; General Quotient ≤ 75; severe sensory impairment). Univariate and multivariate multinomial logistic regression models were performed to analyze the correlation between neonatal variables and neurodevelopmental outcome.

RESULTS

176 ELBWi were enrolled (mean gestational age 26.52 weeks sd2.23; mean birthweight 777.45 g sd142.89). 67% showed a normal outcome at 24 months, 17% minor sequelae and 16% major sequelae (4.6% cerebral palsy on overall sample). The most frequent major sequela was cognitive impairment (8.52%). In the entire sample the median score on the Hearing-Speech subscale was lower than the median scores recorded on the other subscales and showed a significantly weaker correlation to each of the other subscales of the GMDS-ER. Severely abnormal cUS findings (RRR 10.22 p 0.043) and bronchopulmonary dysplasia (RRR 4.36 p 0.008) were independent risk factors for major sequelae and bronchopulmonary dysplasia for minor sequelae (RRR 3.00 p 0.018) on multivariate multinomial logistic regression.

CONCLUSIONS

This study showed an improvement in ELBWI survival rate without neurodevelopmental impairment at 24 months compared to previously reported international cohorts. Cognitive impairment was the most frequent major sequela. Median scores on GMDS-ER showed a peculiar developmental profile characterized by a selective deficit in the language domain. Severely abnormal cUS findings and bronchopulmonary dysplasia were confirmed as independent risk factors for major sequelae.

High Healthcare Use at Age 5 Years in a European Cohort of Children Born Very Preterm

OBJECTIVES

To describe parent-reported healthcare service use at age 5 years in children born very preterm and investigate whether perinatal and social factors and the use of very preterm follow-up services are associated with high service use.

STUDY DESIGN

We used data from an area-based cohort of births at <32 weeks of gestation from 11 European countries, collected from birth records and parental questionnaires at 5 years of age. Using the published literature, we defined high use of outpatient/inpatient care (≥4 sick visits to general practitioners, pediatricians, or nurses, ≥3 emergency room visits, or ≥1 overnight hospitalization) and specialist care (≥2 different specialists or ≥3 visits). We also categorized countries as having either a high or a low rate of children using very preterm follow-up services at age 5 years.

RESULTS

Overall, 43% of children had high outpatient/inpatient care use and 48% had high specialist care use during the previous year. Perinatal factors were associated with high outpatient/inpatient and specialist care use, with a more significant association with specialist services. Associations with intermediate parental educational level and unemployment were stronger for outpatient/inpatient services. Living in a country with higher rates of very preterm follow-up service use was associated with lower use of outpatient/inpatient services.

CONCLUSIONS

Children born very preterm had high healthcare service use at age 5 years, with different patterns for outpatient/inpatient and specialist care by perinatal and social factors. Longer follow-up of children born very preterm may improve care coordination and help avoid undesirable health service use.

The Effects of Clinical Factors and Neonatal Morbidities on Hearing Screening among Neonatal Admissions

BACKGROUND

Hearing loss is an important disorder affecting newborns admitted to NICU. A national hearing screening program using otoacoustic emission testing is an essential tool to identify hearing loss early in neonates, enabling early intervention to avoid further challenges of pediatric deafness. On the other hand, a delay of the auditory pathway maturation in preterm babies compared to term newborns has already been suggested in the literature. Taking this information into account, in this paper, we aim to identify the best time to perform NICU infant hearing screening tests.

OBJECTIVES

We aim to study the clinical factors and neonatal morbidities that may affect neonatal hearing screening results using otoacoustic emission test in order to decrease the false-positive test results that increase parental anxiety and increase the need for subsequent investigations.

METHODS

This is a prospective cross-sectional study that included 204 infants who were admitted to a tertiary referral hospital NICU unit between September 2017 and May 2018. Both transients evoked otoacoustic emissions (TEOAE), and distortion product otoacoustic emission (DPOAE) screening tests were performed in order to screen hearing loss.

RESULTS

Our study included 204 infants, 52.9 % of which were males and 47.1 % females. There were correlations between both hyperbilirubinemia and ventilation ≥ 5 days and the failure rate of the first OAE test results among NICU infants where the P-values were (p=0.0133) and (p=0.0456), respectively. Moreover, 165 babies (80.9 %) passed the first OAE with a mean birth weight of 2759 gram and mean maternal age of 30.6 years, while 39 babies (19.1 %) failed the test with a mean birth weight of 2436 gram and a mean maternal age of 32 years. There was no statistically significant relation between both maternal age and birth weight with failure of the first screening test.

CONCLUSION

Our study suggests a higher failure rate of the first OAE in NICU infants who had hyperbilirubinemia or ventilation ≥ 5 days. Therefore, our recommendation is to postpone the first phase of hearing screening for those infants until the first scheduled vaccine appointment to achieve high compliance to attendance and decrease distress to the family that can be associated with false-negative results of the test.

What Do We Know About Motor Development of Preterm Children Without Major Neurological Damage and Disorder? A Narrative Review

This review addresses the question of a possible specificity of motor development of preterm children with no diagnosis of neurological impairment or major cerebral lesion. With that goal, we proceed with a narrative review on the basis of nine studies. All the studies used standardized assessments of motor abilities with a comparison methodology of preterm and full-term groups aged between 3 and 8 years. The review stresses three major findings in the preterm groups as compared with the full-term groups: (a) inferior fine motor abilities; (b) heterogeneity in motor skills; and (c) differences in efficiency of cognitive, perceptual, and mobilization of perceptual motor processes, which do not necessarily result in lower scores in global performances. These findings suggest the need of long-term medical follow-up for all preterm children whether or not they are at risk for neurodevelopmental disorder. Focusing attention on the use of sensory information for motor control in preterm children could also lead to more precise evaluations of motor abilities, which will then provide more detailed parameters for improved learning and rehabilitation programs.

Validity of an early parent-report questionnaire for language disorder in very preterm children from 2 to 10 years of age

BACKGROUND

Language problems at an early age in very preterm (VP) children can have a detrimental effect on other developmental domains and often persist throughout childhood. The aim of this study was to examine the concurrent and predictive validity of an early language parent-report questionnaire for language disorder in VP children from 2 to 10 years of age.

MATERIALS AND METHODS

In 80 VP children (<32 weeks' gestation) without major disabilities, a parent-questionnaire and formal language assessment, both normed for the general population, were administered at 2 years corrected age (CA). Of these infants, 62 were seen for follow-up formal language assessment at age 4 and 61 were seen at age 10. Sensitivity and specificity values were calculated.

RESULTS

The Lexi-list showed acceptable concurrent validity for word production scores obtained at age 2 CA. The predictive validity was good for sentence production and acceptable for word production scores obtained at age 4, and low for language production scores obtained at age 10. A Lexi-list cut-off score of <85 (i.e., <-1 SD) was found optimal.

INTERPRETATION

A norm-referenced parent-report questionnaire is a useful, first screening tool in a neonatal follow-up. It not only detected early language disorder at age 2 CA but also proved to be a good predictor for language disorder at age 4. However, it did not predict language disorder at age 10. Formal language assessment at age 4 would therefore be recommended for children with an abnormal parent-report language score at age 2 CA.

The Soundscape of Neonatal Intensive Care: A Mixed-Methods Study of the Parents' Experience

Parents who have infants hospitalised in neonatal intensive care units (NICUs) experience high levels of stress, including post-traumatic stress disorder (PTSD) symptoms. However, whether sounds contribute to parents’ stress remains largely unknown. Critically, researchers lack a comprehensive instrument to investigate the relationship between sounds in NICUs and parental stress. To address this gap, this report presents the “Soundscape of NICU Questionnaire” (SON-Q), which was developed specifically to capture parents’ perceptions and beliefs about the impact that sound had on them and their infants, from pre-birth throughout the NICU stay and in the first postdischarge period. Parents of children born preterm (n = 386) completed the SON-Q and the Perinatal PTSD Questionnaire (PPQ). Principal Component Analysis identifying underlying dimensions comprising the parental experience of the NICU soundscape was followed by an exploration of the relationships between subscales of the SON-Q and the PPQ. Moderation analysis was carried out to further elucidate relationships between variables. Finally, thematic analysis was employed to analyse one memory of sounds in NICU open question. The results highlight systematic associations between aspects of the NICU soundscape and parental stress/trauma. The findings underscore the importance of developing specific studies in this area and devising interventions to best support parents’ mental health, which could in turn support infants’ developmental outcomes.

Changes in auditory function in premature children: A prospective cohort study

OBJECTIVES

To analyze the age-specific pattern of auditory function in preterm children as a function of their gestational age at birth.

STUDY DESIGN

longitudinal cohort study.

METHODS

a prospective cohort study involved 271 preterm children aged from 6 months to 15 years old. Children were divided into two groups: 70 children with a gestational age at birth of 32-36 weeks (Group 1) and 201 children with a gestational age of 22-31 weeks (Group 2). Hearing was assessed by ABR, ASSR, OAE, behavioral audiometry, and pure tone audiometry. Additionally, for some children, CT, MRI, and GBJ2 evaluations were performed. Assessments of hearing impaired children were performed 3-4 times a year for children under 2 years of age; 2-3 times a year for children from 2 to 5 years of age; and 1-2 times a year for children over 5 years of age. Infants without any hearing problems were examined 2-3 times during their first year of life, followed by annual examinations as they aged.

RESULTS

The initial hearing examination identified SNHL and ANSD in 18 children (25.7%) and 64 children (31.8%) in Group 1 and Group 2, respectively. No significant difference in the occurrence of auditory impairment in the two groups was found at the initial assessment (p > 0.05). Further long-term follow-up revealed changes in hearing in 16 children: 15 from Group 2 and only one child from Group 1. Four different kinds of hearing changes were noted: hearing recovery to normal levels in children with ANSD; late onset hearing loss; the transformation of ANSD to SNHL, and vice versa. The age, factors, and possible mechanisms of such changes are discussed in the article.

CONCLUSION

The auditory function in prematurely born children tends to be unstable, especially at a very early age. In very preterm infants, it may either deteriorate or improve. Infants born before 31 weeks' gestation require long-term follow-up at least until they are 3-4 years of age. Caution is advised regarding very early cochlear implantation for children born before 32 weeks of gestation age.

[Psychoacoustic methods in diagnosis of central auditory processing disorders in prematurely born children]

INTRODUCTION

The presence of numerous perinatal risk factors and comorbid pathology in prematurely born children, even in the absence of peripheral auditory deficit, can lead to disruptions in the processes of higher nervous sound information processing with the formation of central auditory disorders.

OBJECTIVE

Audiological assessment of the functional state of auditory system central parts in prematurely born children.

MATERIAL AND METHODS

The study involved 54 deeply premature born infants, which were divided into 3 groups depending on age (6-7, 8-9, and 10-11 years), 18 subjects in each group, and 70 healthy, term-born children of the corresponding age. In addition to the traditional audiological examination, all children underwent an assessment of functional state of the central parts of auditory system through a pause detection test (Random Gap Detection Test, RGDT); the perception of fast rhythmic sequences of stimuli, monaural low excess speech testing, binaural interaction test in alternating binaural speech format (ABS ), dichotic presentation of pairs of single digits, single digits and monosyllables, two-digit numerals, Russian matrix phrasal test in noise (RUMatrix) were studied.

RESULTS

Prematurely born infants of all age groups were significantly worse compared to control group (p<0.01) while having RGDT, a test for assessing the perception of fast rhythmic sequences of stimuli and dichotic binaural integration tests. Monaural intelligibility of monosyllabic words in silence in children of all three groups did not differ from normal values, but it suffered from contralateral use of noise interference in children aged 6-7. According to the RUMatrix test, legibility of phrases in noise was impaired in 65% of subjects. Test results in the ABS format revealed a significant violation of speech intelligibility (p<0.01) only in children of the younger age group.

CONCLUSION

In prematurely born children, there is a dysfunction of the central parts of the auditory system, which is multilevel in nature, partially leveling as children grow older. Moreover, the processes of temporary processing of acoustic information suffer to the greatest extent, not being compensated up to adolescence.

Early vocal contact and music in the NICU: new insights into preventive interventions

It is now clearly established that the environment and the sensory stimuli, particularly during the perinatal period, have an impact on infant's development. During the last trimester of gestation, activity-dependent plasticity shapes the fetal brain, and prematurity has been shown to alter the typical developmental trajectories. In this delicate period, preventive interventions aiming at modulating these developmental trajectories through activity-inducing interventions are currently underway to be tested. The purpose of this review paper is to describe the potentialities of early vocal contact and music on the preterm infant's brain development, and their potential beneficial effect on early development. Scientific evidence supports a behavioral orientation of the newborn to organized sounds, such as those of voice and music, and recent neuroimaging studies further confirm full cerebral processing of music as multisensory stimuli. However, the impact of long-term effects of music exposure and early vocal contact on preterm infants' long-term neurodevelopment needs be further investigated. To conclude, it is necessary to establish the neuroscientific bases of the early perception and the long-term effects of music and early vocal contact on the premature newborns' development. Scientific projects are currently on the way to fill this gap in knowledge.

Specialist health care services use in a European cohort of infants born very preterm

AIM

Children born very preterm require additional specialist care because of the health and developmental risks associated with preterm birth, but information on their health service use is sparse. We sought to describe the use of specialist services by children born very preterm in Europe.

METHOD

We analysed data from the multi-regional, population-based Effective Perinatal Intensive Care in Europe (EPICE) cohort of births before 32 weeks' gestation in 11 European countries. Perinatal data were abstracted from medical records and parents completed a questionnaire at 2 years corrected age (4322 children; 2026 females, 2296 males; median gestational age 29wks, interquartile range [IQR] 27-31wks; median birthweight 1230g, IQR 970-1511g). We compared parent-reported use of specialist services by country, perinatal risk (based on gestational age, small for gestational age, and neonatal morbidities), maternal education, and birthplace.

RESULTS

Seventy-six per cent of the children had consulted at least one specialist, ranging across countries from 53.7% to 100%. Ophthalmologists (53.4%) and physiotherapists (48.0%) were most frequently consulted, but individual specialists varied greatly by country. Perinatal risk was associated with specialist use, but the gradient differed across countries. Children with more educated mothers had higher proportions of specialist use in three countries.

INTERPRETATION

Large variations in the use of specialist services across Europe were not explained by perinatal risk and raise questions about the strengths and limits of existing models of care.

WHAT THIS PAPER ADDS

Use of specialist services by children born very preterm varied across Europe. This variation was observed for types and number of specialists consulted. Perinatal risk was associated with specialist care, but did not explain country-level differences. In some countries, mothers' educational level affected use of specialist services.

Language in 2-year-old children born preterm and term: a cohort study

PURPOSE

Language skills are critical. Children born very preterm are vulnerable to language problems, but further work is needed to determine characteristics and specific predictors of language problems in this population. We aimed to compare language outcomes between 2-year-old children born <30 weeks and their term-born peers; and to explore risk factors for language difficulties in this cohort.

DESIGN

Language at 2 years was examined in 134 children born <30 weeks and 133 children born at term using the Bayley Scales of Infant and Toddler Development - 3rd Edition (Bayley-3) and the Communication and Symbolic Behaviour Scale: Developmental Profile (Infant Toddler Checklist) (CSBS:DP). Outcomes were compared between groups. Factors hypothesised to predict language outcome were examined in the preterm group: gestational age at birth, birth weight z-score, sex, hearing loss, multilingualism, maternal education, brain abnormality on MRI, medical risk and oromotor concerns at 12 months.

RESULTS

Children born <30 weeks performed more poorly on the CSBS:DP (particularly the social and symbolic composites) and the language scale of the Bayley-3 at 2 years than term-born peers. Lower gestational age at birth, male sex, hearing loss and multilingualism predicted poorer language scores.

CONCLUSIONS

Despite improvements in medical management, children born very preterm exhibit language delays at 2 years of age, with specific deficits in social communication and symbolic skills. Significant predictors of poorer language outcomes were similar to those in the general population (male sex, hearing loss, multilingualism), suggesting that further work is needed to establish which specific factors place preterm-born children at heightened risk.

Impact of Nonmedical Factors on Neurobehavior and Language Outcomes of Preterm Infants

Preterm infants are at increased risk for adverse neurodevelopmental outcomes. The impact of maternal, NICU, and social environmental factors on early neurobehavior and language outcomes of preterm infants is recognized. There is a need for health care professionals to have a clear understanding of the importance of facilitating positive mother-infant relationships, and to address not only the infant's sensory and language environment, but also focus on adverse maternal mental health and social adversities to optimize infant outcomes.

The impact of advanced maternal age on the outcomes of very low birth weight preterm infants

The association between advanced maternal age and neonatal outcomes remains controversial. This study attempted to determine the short-term and long-term outcomes of very low birth weight (VLBW, <1500 g) preterm infants, born to mothers of advanced age (≥35 years).In this retrospective cohort study, VLBW infants were divided into the advanced maternal age group and comparison group. We compared the pregnancy complications, demographic factors, short-term morbidities, and neurodevelopmental outcomes using the Bayley Scales of Infant Development-Third Edition, at 24 months of corrected age between the 2 groups.The study comprised of 536 VLBW infants born to 483 mothers. Mothers of advanced age had a significantly lower rate of primiparity compared to the comparison group (45.8% vs 65.2%, P < .001), and were more likely to have gestational diabetes (13.7% vs 5.5%, P = .002) and to undergo in vitro fertilization (IVF; 18.4% vs 9.9%, P = .01). No significant differences were found between the 2 groups in terms of short-term outcomes. At 2 years of corrected age, advanced maternal age was associated with a higher incidence of severe speech delay (11.3% vs 5.7%, P = .04), neurodevelopmental impairment (NDI; 28.8% vs 18.4%, P = .02), and adverse composite outcome (37.4% vs 27.3%, P = .02). However, the differences in NDI and composite adverse outcomes were not statistically significant between the groups after adjustments for potential confounders.Advanced maternal age was not associated with major morbidities and long-term NDI among VLBW preterm infants. The association between advanced maternal age and severe speech delay in the infant needs further investigation.

Transition From Hospital to Home in Parents of Preterm Infants: Revision, Modification, and Psychometric Testing of the Questionnaire

BACKGROUND AND PURPOSE

Transition from hospital to home in parents of prematurely born infants can be challenging. This methodological study aimed to develop an instrument to measure transitional problems in parents after hospital discharge.

METHODS

Kenner's Transition Questionnaire was modified based on findings of the literature review and a qualitative study. Content validity of the revised tool was determined by a panel of experts, and field testing was conducted via an online survey of parents of preterm infants (N = 704). Exploratory factor analysis (principal axis factoring and direct oblimin rotation) was performed.

RESULTS

Results showed four correlated factors in parental transition from hospital to home: Isolation, Worry, Confidence, and Professional Support (17 items total). Factor loadings ranged from .59 to .87, and reliability estimates ranged from .77 to .87.

CONCLUSION

The revised instrument demonstrated adequate psychometric characteristics; further testingand validation of the instrument is warranted.

Aberrant structural and functional connectivity and neurodevelopmental impairment in preterm children

Background

Despite advances in antenatal and neonatal care, preterm birth remains a leading cause of neurological disabilities in children. Infants born prematurely, particularly those delivered at the earliest gestational ages, commonly demonstrate increased rates of impairment across multiple neurodevelopmental domains. Indeed, the current literature establishes that preterm birth is a leading risk factor for cerebral palsy, is associated with executive function deficits, increases risk for impaired receptive and expressive language skills, and is linked with higher rates of co-occurring attention deficit hyperactivity disorder, anxiety, and autism spectrum disorders. These same infants also demonstrate elevated rates of aberrant cerebral structural and functional connectivity, with persistent changes evident across advanced magnetic resonance imaging modalities as early as the neonatal period. Emerging findings from cross-sectional and longitudinal investigations increasingly suggest that aberrant connectivity within key functional networks and white matter tracts may underlie the neurodevelopmental impairments common in this population.

Main body

This review begins by highlighting the elevated rates of neurodevelopmental disorders across domains in this clinical population, describes the patterns of aberrant structural and functional connectivity common in prematurely-born infants and children, and then reviews the increasingly established body of literature delineating the relationship between these brain abnormalities and adverse neurodevelopmental outcomes. We also detail important, typically understudied, clinical, and social variables that may influence these relationships among preterm children, including heritability and psychosocial risks.

Conclusion

Future work in this domain should continue to leverage longitudinal evaluations of preterm infants which include both neuroimaging and detailed serial neurodevelopmental assessments to further characterize relationships between imaging measures and impairment, information necessary for advancing our understanding of modifiable risk factors underlying these disorders and best practices for improving neurodevelopmental trajectories in this high-risk clinical population.

[Age-specific dynamics of the auditory function in the extremely premature babies]

Extremely early premature babies (i.e. those born before the 32^nd week of pregnancy) constitute a group at high risk of development of the perceptive forms of hearing impairment represented mostly by chronic sensorineural hearing loss (CSNHL) and hearing neuropathy (HN). The timely diagnostics of these hearing disorders in premature children and, accordingly, their early and adequate rehabilitation provide a basis for the prevention of hearing and speech problems. At the same time, the hearing function in prematurely born babies is known to be highly unstable and can undergo substantial changes with age; these changes are most frequently observed during the early childhood. This paper was designed to report the results of observations of the hearing function dynamics in a cohort of the extremely early premature children. A total of 186 babies were available for the examination. It was shown that 14 (7.5%) of them had hearing problems. They disappeared by the 12^th and 24^th months of life in 3 children. Three other babies experienced transformation of NH into CSNHL at the age of 12, 14, and 18 months. NH transformed into CSNHL in three children by the age of 12, 24, and 48 months. Five children developed delayed CSNHL by the 10^th, 15^th, 24^th, 28^th, and 36^th months of the actual life. These findings give evidence that the extremely premature children may experience both the improvement of the hearing function due largely to the processes of maturation in the auditory system and its deterioration or delayed formation of hearing impairment. It is concluded that the extremely early premature children born before the 32^nd week of pregnancy should remain under the dynamic audiological observation at least as long as the third or fourth years of life.

Neurodevelopmental Outcomes in Early Childhood

Technological advances in neonatal-perinatal medicine have led to a steady increase in the survival of preterm infants. Although the increase in survival is a remarkable success, children born preterm remain at high risk for brain injury and long-term neurodevelopmental deficits. Children born preterm may have abnormal muscle tone or movements, cognitive deficits, language impairments, and behavioral problems. This article reviews neurodevelopmental outcomes and factors that influence outcomes in preterm children during early childhood.

Biological and Social Influences on the Neurodevelopmental Outcomes of Preterm Infants

Although very preterm birth and very low birthweight are recognized risk factors for longer term developmental difficulties, there is a wide spectrum of outcomes for children and adolescents born preterm. Biological and social variables have the potential to explain this variability. Although current understanding of these influences and how they interact is incomplete, perinatal factors are related to permanent neurosensory impairments such as cerebral palsy, blindness, and deafness. Cognitive and academic outcomes are variably associated with biological and social variables across development, and the most robust correlates of behavior and mental health difficulties include early behavioral problems and family influences.

Factors affecting neurodevelopmental outcome at 2 years in very preterm infants below 1250 grams: a prospective study

OBJECTIVE

To evaluate the neurodevelopmental outcomes of preterm very-low birth weight (PT/VLBW) infants at 2 years and identify risk factors associated with significant developmental delay or neurodevelopmental impairment (NDI).

STUDY DESIGN

We evaluated 165 PT/VLBW infants born between January 2010 and December 2011, using the Bayley Scales of Infant and Toddler Development 3rd Edition (Bayley-III). NDI was defined as the presence of neurosensory impairment or significant delay with Bayley-III score < 70 in any domain and risk factors for delay/NDI were assessed using logistic regressions.

RESULTS

Median Bayley-III composite scores in the cognitive, language and motor domains were 95, 89 and 94, respectively. NDI was present in 20% of the children, with 5-18% having significant delay in either cognitive, language or motor domain, seven (4%) children had cerebral palsy, three (2%) were deaf and none were blind. Regression models identified significant positive associations of delayed cognitive skills with male gender (Odds ratio (OR) 22.4, 95% confidence interval (CI) 1.5-341.1; P = 0.025), lack of anntenatal steroids (ANS) (OR 41.5, 95% CI 3.5-485.7; P = 0.003), and hypotension needing inotropes (OR 36.0, 95% CI 2.6-506.0; P = 0.008); delayed language skills with lower maternal education (OR 3.8, 95% CI 1.4-10.3; P = 0.10), lack of ANS (OR 2.8, 95% CI 1.1-7.4; P = 0.04), and 5 minute Apgar Score ≤ 5 (OR 7.4, 95% CI 1.4-38.4; P = 0.017) and delayed motor skills with chronic lung disease at 36 weeks (OR 38.3, 95% CI 2.4-603.4; P = 0.010). NDI was associated with lack of ANS (OR 2.91, 95% CI 1.21-7.00; P = 0.02) and use of postnatal steroids (OR 3.36, 95% CI 1.07-10.54; P = 0.0374).

CONCLUSION

Risk factors for both NDI and individual domain delay were identified and will be helpful in planning of specific and targeted early intervention services.

Feasibility of event-related potential (ERP) biomarker use to study effects of mother's voice exposure on speech sound differentiation of preterm infants

Atypical maturation of auditory neural processing contributes to preterm-born infants' language delays. Event-related potential (ERP) measurement of speech-sound differentiation might fill a gap in treatment-response biomarkers to auditory interventions. We evaluated whether these markers could measure treatment effects in a quasi-randomized prospective study. Hospitalized preterm infants in passive or active, suck-contingent mother's voice exposure groups were not different at baseline. Post-intervention, the active group had greater increases in/du/-/gu/differentiation in left frontal and temporal regions. Infants with brain injury had lower baseline/ba/-/ga/and/du/-/gu/differentiation than those without. ERP provides valid discriminative, responsive, and predictive biomarkers of infant speech-sound differentiation.

Auditory processing abilities in prematurely born children

Aim To compare the performance in temporal auditory ordering and resolution tests and the latency and amplitude in the records of middle latency auditory evoked potential and P3 of prematurely born children with the performance of full-term children undergoing the same assessment protocol.

STUDY DESIGN

Cross-sectional observational study.

SUBJECTS

Fifty-two children, aged 8 to 10 years, participated in the study and were divided into two groups: study group: 16 prematurely born children, and control group: 36 born full-term, at low risk for developmental alteration and without scholastic or hearing difficulties.

OUTCOME MEASURES

All subjects underwent ordering tests (Frequency and duration pattern tests) and temporal auditory resolution tests (Gaps in noise test) and had their middle-latency auditory evoked potential and P3 recorded by using an Intelligent Hearing System unit.

RESULTS

Prematurely born children had worse performance in the temporal ordering and resolution tests as compared with children born full-term. With regard to middle-latency auditory evoked potential and P3, prematurely born children had higher mean values of latencies and poorer morphology, a statistical significance was evidenced for P3 in the right ear.

CONCLUSIONS

A prematurity effect was found in the temporal auditory processing measurements and in the P3.

Immuno-modulator inter-alpha inhibitor proteins ameliorate complex auditory processing deficits in rats with neonatal hypoxic-ischemic brain injury

Hypoxic-ischemic (HI) brain injury is recognized as a significant problem in the perinatal period, contributing to life-long language-learning and other cognitive impairments. Central auditory processing deficits are common in infants with hypoxic-ischemic encephalopathy and have been shown to predict language learning deficits in other at risk infant populations. Inter-alpha inhibitor proteins (IAIPs) are a family of structurally related plasma proteins that modulate the systemic inflammatory response to infection and have been shown to attenuate cell death and improve learning outcomes after neonatal brain injury in rats. Here, we show that systemic administration of IAIPs during the early HI injury cascade ameliorates complex auditory discrimination deficits as compared to untreated HI injured subjects, despite reductions in brain weight. These findings have significant clinical implications for improving central auditory processing deficits linked to language learning in neonates with HI related brain injury.