Follow-up of very low birthweight babies to adolescence

Assessing Functional Outcomes in the Pediatric Neurocritical Care Population After Discharge: A Pilot Study

OBJECTIVES

Pediatric neurocritical care (PNCC) patients experience high rates of morbidity, but comprehensive follow-up is not universal. We sought to identify predictors of functional decline in these children to guide future resource allocation.

PATIENTS AND METHODS

We conducted a prospective observational study in a quaternary children's hospital pediatric intensive care unit (PICU) from July 2023 to December 2023. Patients (aged 3-17 years) were admitted with a PNCC diagnosis, and their caregivers were enrolled. Outcomes were assessed through surveys using the Functional Status Scale (FSS) at time of consent (baseline) and the 2-month follow-up after PICU discharge. Follow-up surveys explored social, educational, and cognitive difficulties encountered after discharge. Functional decline was defined as any increase in FSS between baseline and follow-up, and severe morbidity was defined as an overall increase of 3 or more or an increase of 2 or more in one domain. Demographic and in-hospital variables were extracted from a clinical database to analyze with outcomes.

RESULTS

A total 30 of 31 families consented, and 29 completed follow-up surveys. Out of those, 17 (58.6%) patients had a functional decline, 8 (27.6%) had a new severe morbidity, only 12 (41.4%) had returned to school, and 16 (55.2%) had new family hardships. Mechanical ventilation was a significant predictor of functional decline (odds ratio, 6.50, 95% CI, 1.26-33.58; P = .025).

CONCLUSIONS

This study supplements reports of high morbidity after pediatric neurocritical illness. Targeting patients most at risk for functional decline, such as those receiving mechanical ventilation, can support efficient resource allocation for follow-up programs promoting health-related quality of life. Larger studies are needed to validate and expand on these findings.

The effect of exposure to traffic related air pollutants in pregnancy on birth anthropometry: a cohort study in a heavily polluted low-middle income country

BACKGROUND

Ambient air pollution has been recognized as one of the most important environmental health threats. Exposure in early life may affect pregnancy outcomes and the health of the offspring. The main objective of our study was to assess the association between prenatal exposure to traffic related air pollutants during pregnancy on birth weight and length. Second, to evaluate the association between prenatal exposure to traffic related air pollutants and the risk of low birth weight (LBW).

METHODS

Three hundred forty mother-infant pairs were included in this prospective cohort study performed in Jakarta, March 2016-September 2020. Exposure to outdoor PM_2.5, soot, NO_x, and NO₂ was assessed by land use regression (LUR) models at individual level. Multiple linear regression models were built to evaluate the association between air pollutants with birth weight (BW) and birth length (BL). Logistic regression was used to assess the risk of low birth weight (LBW) associated with all air pollutants.

RESULTS

The average PM_2.5 concentration was almost eight times higher than the current WHO guideline and the NO₂ level was three times higher. Soot and NO_x were significantly associated with reduced birth length. Birth length was reduced by - 3.83 mm (95% CI -6.91; - 0.75) for every IQR (0.74 × 10^- 5 per m) increase of soot, and reduced by - 2.82 mm (95% CI -5.33;-0.30) for every IQR (4.68 μg/m³) increase of NO_x. Outdoor air pollutants were not significantly associated with reduced birth weight nor the risk of LBW.

CONCLUSION

Exposure to soot and NO_x during pregnancy was associated with reduced birth length. Associations between exposure to all air pollutants with birth weight and the risk of LBW were less convincing.

Continuing Care For Critically Ill Children Beyond Hospital Discharge: Current State of Follow-up

OBJECTIVES

Survivors of the PICU face long-term morbidities across health domains. In this study, we detail active PICU follow-up programs (PFUPs) and identify perceptions and barriers about development and maintenance of PFUPs.

METHODS

A web link to an adaptive survey was distributed through organizational listservs. Descriptive statistics characterized the sample and details of existing PFUPs. Likert responses regarding benefits and barriers were summarized.

RESULTS

One hundred eleven respondents represented 60 institutions located in the United States (n = 55), Canada (n = 3), Australia (n = 1), and the United Kingdom (n = 1). Details for 17 active programs were provided. Five programs included broad PICU populations, while the majority were neurocritical care (53%) focused. Despite strong agreement on the need to assess and treat morbidity across multiple health domains, 29% were physician only programs, and considerable variation existed in services provided by programs across settings. More than 80% of all respondents agreed PFUPs provide direct benefits and are essential to advancing knowledge on long-term PICU outcomes. Respondents identified "lack of support" as the most important barrier, particularly funding for providers and staff, and lack of clinical space, though successful programs overcome this challenge using a variety of funding resources.

CONCLUSIONS

Few systematic multidisciplinary PFUPs exist despite strong agreement about importance of this care and direct benefit to patients and families. We recommend stakeholders use our description of successful programs as a framework to develop multidisciplinary models to elevate continuity across inpatient and outpatient settings, improve patient care, and foster collaboration to advance knowledge.

Interaction of Impulsivity, Attention, and Intelligence in Early Adolescents Born Preterm without Sequelae

There is insufficient evidence on the intellectual and attentional profile of adolescents born prematurely. Aim: to identify maladjustment in intellectual and attention skills at the beginning of secondary school. Method: 69 premature 12-year-old adolescents were evaluated with the WISC, d2 Test of Attention, and Test of Perception of Differences-Revised (CARAS-R). Results: adolescents present intellectual and attention abilities in the normal range. However, all premature adolescents show difficulties in impulse control and female adolescents are better in processing speed. Depending on the category of prematurity, differences in attention skills are evident. Conclusion: adolescents born prematurely without associated sequelae have significantly lower performance in the same areas than the normative group. This could affect the cognitive control of their behavior and academic performance in the medium and long term. Great prematurity could interfere with attention skills and self-control even at the age of 12, especially in males.

Relative contributions of prenatal complications, perinatal characteristics, neonatal morbidities and socio-economic conditions of preterm infants on the occurrence of developmental disorders up to 7 years of age

BACKGROUND

To investigate the relative contributions of prenatal complications, perinatal characteristics, neonatal morbidities and socio-economic conditions on the occurrence of motor, sensory, cognitive, language and psychological disorders in a large longitudinal preterm infant population during the first 7 years after birth.

METHODS

The study population comprised 4122 infants born at <35 weeks of gestation who were followed for an average of 74.0 months after birth. Developmental disorders, including motor, sensory, cognitive, language and psychological, were assessed at each follow-up visit from 18 months to 7 years of age. The investigated determinants included prenatal complications (prolonged rupture of membranes >24 hours, intrauterine growth restriction, preterm labour and maternal hypertension), perinatal characteristics (gender, multiple pregnancies, gestational age, birth weight, APGAR score and intubation or ventilation in the delivery room), neonatal complications (low weight gain during hospitalization, respiratory assistance, severe neurological anomalies, nosocomial infections) and socio-economic characteristics (socio-economic level, parental separation, urbanicity). Based on hazard ratios determined using a propensity score matching approach, population-attributable fractions (PAF) were calculated for each of the four types of determinants and for each developmental disorder.

RESULTS

The percentages of motor, sensory, cognitive, language and psychological disorders were 17.0, 13.4, 29.1, 25.9 and 26.1%, respectively. The PAF for the perinatal characteristics were the highest and they were similar for the different developmental disorders considered (around 60%). For the neonatal and socio-economic determinants, the PAF varied according to the disorder, with contributions of up to 17% for motor and 27% for language disorders, respectively. Finally, prenatal complications had the lowest contributions (between 6 and 13%).

CONCLUSIONS

This study illustrates the heterogeneity of risk factors on the risk of developmental disorder in preterm infants. These results suggest the importance of considering both medical and psycho-social follow-ups of preterm infants and their families.

Poorer outcomes of all low birth weight groups at age 10: Missouri statewide case-control study

BACKGROUND

In 1989-1991, a population-based cohort of every Missouri birth weighing < 1500 g was identified over a 16-month period. Infants born moderately low birth weight (MLBW, 1500-2499 g) and normal birth weight (NBW, ≥ 2500 g), were matched to < 1500 g infants by delivery date, race, maternal age, and residence.

AIMS

To compare outcomes of extremely low birth weight (ELBW, < 1000 g), very low birth weight (VLBW, 1000-1499 g), and MLBW, to NBW infants at age 10.

STUDY DESIGN

A population-based cohort and matched case-control study OUTCOME MEASURES: A Child Health and Development Questionnaire developed for this study collected social, medical, educational and special services history. The Conners' Parent Rating Scale-Revised was also completed by parents/caregivers.

RESULTS

As birth weight declined, the prevalence of adverse outcomes increased. Children in all LBW groups were more likely than NBW children to have problems in speech and language, vision, fine and gross motor tasks, illnesses, attention, school performance, and increased requirements for therapy and accommodation. Repetition of a grade was three times higher for MLBW children and over three times higher for the other LBW groups.

CONCLUSION

In this statewide population-based study, controlling for child's sex, mother's age, race, residence, education, marital status, Medicaid assistance, and smoking or alcohol use during pregnancy, failed to eliminate the strong effect of decreasing birth weight. Problems were most frequent in ELBW, however, VLBW and MLBW also had many significantly greater problems than NBW children. All LBW groups of children experienced greater adverse health and developmental outcomes resulting in significant habilitation and educational challenges.

Long-Term Neurodevelopmental and Functional Outcomes of Infants Born Very Preterm and/or with a Very Low Birth Weight

BACKGROUND

Birth weight (BW) is often used as a proxy for gestational age (GA) in studies on preterm birth. Recent findings indicate that, in addition to perinatal outcomes, subjects born very preterm (VP; GA < 32 weeks) differ from those with a very low birth weight (VLBW; BW < 1,500 g) in postnatal growth up to their final height.

OBJECTIVE

To study whether neurodevelopmental and functional outcomes at the age of 19 years differ in VP and/or VLBW subjects.

METHODS

705 19-year-old subjects from the Project on Preterm and Small-for-Gestational-Age Infants (POPS) cohort were classified as (1) VP+/VLBW+ (n = 354), (2) VP+/VLBW- (n = 144), or (3) VP-/VLBW+ (n = 207), and compared with regard to IQ as assessed with the Multicultural Capacity Test-intermediate level; neuromotor function using Touwen's examination of mild neurologic dysfunction; hearing loss; self- and parent-reported behavioral and emotional functioning; educational achievement and occupation; and self-assessed health using the Health Utilities Index and the London Handicap Scale.

RESULTS

VP+/VLBW- infants, on average, had 3.8-point higher IQ scores (95% confidence interval [CI] 0.5-7.1), a trend towards higher educational achievement, 3.3-dB better hearing (95% CI 1.2-5.4), and less anxious behavior, attention problems, and internalizing behavior than to VP+/VLBW+ subjects. VP-/VLBW+ infants reported 1.8 increased odds (95% CI 1.2-2.6) of poor health compared to VP+/VLBW+ subjects.

CONCLUSIONS

At the age of 19 years, subjects born VP+/VLBW+, VP+/VLBW-, and VP-/VLBW+ have different neurodevelopmental and functional outcomes, although effect sizes are small. Hence, the terms VP and VLBW are not interchangeable. We recommend, at least for industrialized countries, to base inclusion in future studies on preterm populations on GA instead of on BW.

Long-Term Functioning and Participation Across the Life Course for Preterm Neonatal Intensive Care Unit Graduates

To understand the trajectories of risk and resilience in the vulnerable preterm and neonatal brain, clinicians must go beyond survival and critically examine on a population basis the functional outcomes of children, adolescents, and adults across their life course. Evaluations must go well beyond Bayley assessments and counts of neonatal morbidities, such as bronchopulmonary dysplasia, retinopathy of prematurity, sonographic brain injury, sepsis, and necrotizing enterocolitis. Proactively providing support to families and developmental and educational supports to children can optimize academic functioning and participation in adult learning, physical and behavioral health activities, community living, relationships, and employment.

Educational and rehabilitation service utilization in adolescents born preterm or with a congenital heart defect and at high risk for disability

AIM

This historical cohort study describes the use of educational and rehabilitation services in adolescents born preterm or with a congenital heart defect (CHD).

METHOD

Parents of 76 young people (mean age 15y 8mo [SD 1y 8mo]) with CHD and 125 born ≤29 weeks gestational age (mean age 16y [SD 2y 5mo]) completed a demographics questionnaire including educational and rehabilitation resource utilization within the previous 6 months. Rehabilitation services included occupational therapy, physical therapy, speech language pathology, psychology. Developmental (Leiter Brief IQ, Movement-ABC, Strengths and Difficulties Questionnaire) and functional (Vineland) status of the young people was assessed. Pearson χ² tests were used to perform simple pairwise comparisons of categorical outcomes across the two groups (CHD, preterm). Univariate logistic regression was used to examine predictors of service utilization.

RESULTS

Developmental profiles of the two groups (CHD/preterm) were similar (29.9%/30% IQ<80; 43.5%/50.0% motor difficulties; 23.7%/22.9% behavior problems). One-third received educational supports or attended segregated schools. Only 16% (preterm) and 26.7% (CHD) were receiving rehabilitation services. Services were provided predominantly in the school setting, typically weekly. Few received occupational therapy or physical therapy (1.3-7.6%) despite functional limitations. Leiter Brief IQ<70 was associated with receiving educational supports (CHD: OR 5.53, 95% CI 1.29-23.68; preterm: OR 14.63, 3.10-69.08) and rehabilitation services (CHD: OR 4.46, 1.06-18.88; preterm: OR 5.11, 1.41-18.49). Young people with motor deficits were more likely to require educational (CHD: OR 5.72, 1.99-16.42; preterm: OR 3.11, 1.43-6.77) and rehabilitation services (preterm: OR 3.97, 1.21-13.03).

INTERPRETATION

Although young people with impairments were more likely to receive educational and rehabilitation services, many may not be adequately supported, particularly by rehabilitation specialists. Rehabilitation services at this important transition phase could be beneficial in optimizing adaptive functioning in the home, school, and community.

Feasibility of a Team Approach to Complex Congenital Heart Defect Neurodevelopmental Follow-Up: Early Experience of a Combined Cardiology/Neonatal Intensive Care Unit Follow-Up Program

Infants with complex congenital heart disease are at high risk for poor neurodevelopmental outcomes. However, implementation of dedicated congenital heart disease follow-up programs presents important infrastructure, personnel, and resource challenges. We present the development, implementation, and retrospective review of 1- and 2-year outcomes of a Complex Congenital Heart Defect Neurodevelopmental Follow-Up program. This program was a synergistic approach between the Pediatric Cardiology, Cardiothoracic Surgery, Pediatric Intensive Care, and Neonatal Intensive Care Unit Follow-Up teams to provide a feasible and responsible utilization of existing infrastructure and personnel, to develop and implement a program dedicated to children with congenital heart disease. Trained developmental testers administered the Ages and Stages Questionnaire-3 over the phone to the parents of all referred children at least once between 6 and 12 months' corrected age. At 18 months' corrected age, all children were scheduled in the Neonatal Intensive-Care Unit Follow-Up Clinic for a visit with standardized neurological exams, Bayley III, multidisciplinary therapy evaluations and continued follow-up. Of the 132 patients identified in the Cardiothoracic Surgery database and at discharge from the hospital, a total number of 106 infants were reviewed. A genetic syndrome was identified in 23.4% of the population. Neuroimaging abnormalities were identified in 21.7% of the cohort with 12.8% having visibly severe insults. As a result, 23 (26.7%) received first-time referrals for early intervention services, 16 (13.8%) received referrals for new services in addition to their existing ones. We concluded that utilization of existing resources in collaboration with established programs can ensure targeted neurodevelopmental follow-up for all children with complex congenital heart disease.

A Norwegian prospective study of preterm mother-infant interactions at 6 and 18 months and the impact of maternal mental health problems, pregnancy and birth complications

OBJECTIVE

Pregnancy, birth and health complications, maternal mental health problems following preterm birth and their possible impact on early mother-infant interaction at 6 and 18 months corrected age (CA) were explored. Predictors of mother-infant interaction at 18 months CA were identified.

DESIGN AND METHODS

This prospective longitudinal and observational study included 33 preterm mother-infant (<33 gestational age (GA)) interactions at 6 and 18 months CA from a socioeconomic low-risk, middle-class sample. The Parent-Child Early Relational Assessment (PCERA) scale was used to assess the mother-infant interaction.

RESULTS

'Bleeding in pregnancy' predicted lower quality in preterm mother-infant interaction in 6 PCERA scales, while high 'maternal trait anxiety' predicted higher interactional quality in 2 PCERA scales and 'family size' predicted lower interactional quality in 1 PCERA scale at 18 months CA. Mothers with symptoms of post-traumatic stress reactions, general psychological distress and anxiety at 2 weeks postpartum (PP) showed significantly better outcome than mothers without symptoms in 6 PCERA subscales at 6 months CA and 2 PCERA subscales at 18 months CA.

CONCLUSIONS

Our study detected a correspondence between early pregnancy complications and lower quality of preterm mother-infant interaction, and an association between high levels of maternal mental health problems and better quality in preterm mother-infant interaction.

Perinatal, neonatal, and family social factors predicting poor school outcome of low-birth-weight survivors: an integrative review

PURPOSE

To examine the relationship of perinatal factors, neonatal factors, and family characteristics with school outcomes of low-birth-weight (LBW) children.

DESIGN AND METHODS

An integrative review of the literature was performed using electronic databases focusing on key words, including school outcome, school performance, educational outcome, academic outcome/academic achievement, and LBW.

RESULTS

The in utero or neonatal risk factors for poor school outcome included in this review were perinatal brain injury, brain structural abnormality, motor deficits, and neonatal conditions. Social risk factors found to contribute to poorer school outcomes were family structure, family stability, parental education, poverty, male sex, nonwhite race, and acculturation level.

CONCLUSIONS

Long-term school outcomes of LBW children are influenced by a number of factors related to the characteristics of both children and their families. These factors need to be considered when designing preventive interventions.

Infant growth after preterm birth and neurocognitive abilities in young adulthood

OBJECTIVES

To examine whether faster growth from birth to term (40 postmenstrual weeks) and during the first year thereafter was associated with better neurocognitive abilities in adults born preterm with very low birth weight (VLBW; <1500 g).

STUDY DESIGN

Weight, length, and head circumference data of 103 VLBW participants of the Helsinki Study of Very Low Birth Weight Adults were collected from records. Measures at term and at 12 months of corrected age were interpolated. The participants underwent tests of general neurocognitive ability, executive functioning, attention, and visual memory at mean age of 25.0 years.

RESULTS

Faster growth from birth to term was associated with better general neurocognitive abilities, executive functioning, and visual memory in young adulthood. Effect sizes in SD units ranged from 0.23-0.43 per each SD faster growth in weight, length, or head circumference (95% CI 0.003-0.64; P values <.05). After controlling for neonatal complications, faster growth in head circumference remained more clearly associated with neurocognitive abilities than weight or length did. Growth during the first year after term was not consistently associated with neurocognitive abilities.

CONCLUSIONS

Within a VLBW group with high variability in early growth, faster growth from birth to term is associated with better neurocognitive abilities in young adulthood. Neurocognitive outcomes were predicted, in particular, by early postnatal head growth.

Comportamento de Escolares Estratificados pelo Peso ao Nascer e Idade Gestacional

O peso e a idade gestacional são critérios relevantes para avaliação das condições de nascimento das crianças. O objetivo do presente estudo foi caracterizar e comparar o desempenho comportamental de uma coorte de crianças estratificada pelo peso ao nascer e pelo peso ao nascer em relação à idade gestacional. Avaliaram-se, aos 10/11 anos, 677 crianças por meio do Questionário de Capacidades e Dificuldades. Verificou-se, com significância estatística, os seguintes resultados: o grupo Baixo Peso apresentou mais sintomas emocionais que o grupo Peso Normal; o grupo Muito Baixo Peso mostrou mais hiperatividade em comparação aos outros; o grupo Pequeno para a Idade Gestacional apresentou mais dificuldades no escore total e mais sintomas emocionais em relação aos demais grupos. Concluiu-se que a estratificação por dois critérios permitiu a identificação de dificuldades específicas quanto ao desempenho comportamental.

DoMINO: Donor milk for improved neurodevelopmental outcomes

BACKGROUND

Provision of mother's own milk is the optimal way to feed infants, including very low birth weight infants (VLBW, <1500 g). Importantly for VLBW infants, who are at elevated risk of neurologic sequelae, mother's own milk has been shown to enhance neurocognitive development. Unfortunately, the majority of mothers of VLBW infants are unable to provide an adequate supply of milk and thus supplementation with formula or donor milk is necessary. Given the association between mother's own milk and neurodevelopment, it is important to ascertain whether provision of human donor milk as a supplement may yield superior neurodevelopmental outcomes compared to formula.Our primary hypothesis is that VLBW infants fed pasteurized donor milk compared to preterm formula as a supplement to mother's own milk for 90 days or until hospital discharge, whichever comes first, will have an improved cognitive outcome as measured at 18 months corrected age on the Bayley Scales of Infant Development, 3(rd) ed. Secondary hypotheses are that the use of pasteurized donor milk will: (1) reduce a composite of death and serious morbidity; (2) support growth; and (3) improve language and motor development. Exploratory research questions include: Will use of pasteurized donor milk: (1) influence feeding tolerance and nutrient intake (2) have an acceptable cost effectiveness from a comprehensive societal perspective?

METHODS/DESIGN

DoMINO is a multi-centre, intent-to-treat, double blinded, randomized control trial. VLBW infants (n = 363) were randomized within four days of birth to either (1) pasteurized donor milk or (2) preterm formula whenever mother's own milk was unavailable. Study recruitment began in October 2010 and was completed in December 2012. The 90 day feeding intervention is complete and long-term follow-up is underway.

DISCUSSION

Preterm birth and its complications are a leading cause long-term morbidity among Canadian children. Strategies to mitigate this risk are urgently required. As mother's own milk has been shown to improve neurodevelopment, it is essential to ascertain whether pasteurized donor milk will confer the same advantage over formula without undue risks and at acceptable costs. Knowledge translation from this trial will be pivotal in setting donor milk policy in Canada and beyond.

TRIAL REGISTRATION

ISRCTN35317141; Registered 10 August 2010.

Human infancy…and the rest of the lifespan

Human infancy has been studied as a platform for hypothesis and theory testing, as a major physiological and psychological adjustment, as an object of adults' effects as well as a source of effects on adults, for its comparative value, as a stage of life, and as a setting point for the life course. Following an orientation to infancy studies, including previous reviews and a discussion of the special challenges infants pose to research, this article focuses on infancy as a foundation and catalyst of human development in the balance of the life course. Studies of stability and prediction from infancy illustrate the depth and complexity of modern research on infants and provide a long-awaited reply to key philosophical and practical questions about the meaningfulness and significance of infancy.

ART and health: clinical outcomes and insights on molecular mechanisms from rodent studies

Since the birth of the first IVF-conceived child in 1978, the use of assisted reproductive technologies (ART) has grown dramatically, contributing to the successful birth of 5 million individuals worldwide. However, there are several reported associations of ART with pregnancy complications, such as low birthweight (LBW), preterm birth, birth defects, epigenetic disorders, cancer and poor metabolic health. Whether this is attributed to ART procedures or to the subset of the population seeking ART remains a controversy, but the most relevant question today concerns the potential long-term implications of assisted conception. Recent evidence has emerged suggesting that ART-conceived children have distinct metabolic profiles that may predispose to cardiovascular pathologies in adulthood. Because the eldest IVF individuals are still too young to exhibit components of chronic middle-aged syndromes, the use of animal models has become particularly useful in describing the effects of unusual or stressful preimplantation experiences on adult fitness. Elucidating the molecular mechanisms by which embryos integrate environmental signals into development and metabolic gene expression programs will be essential for optimizing ART procedures such as in vitro culture conditions, embryo selection and transfer. In the future, additional animal studies to identify mechanisms underlying unfavorable ART outcomes, as well as more epidemiological reviews to monitor the long-term health of ART children are required, given that ART procedures have become routine medical practice.

Preimplantation stress and development

The developmental origins of health and disease hypothesis holds that inappropriate environmental cues in utero, a period marked by tremendous developmental sensitivity, facilitate cellular reprogramming to ultimately predispose disease in adulthood. In this review, we analyze if stress during early stages of development can affect future health. This has wide clinical importance, given that 5 million children have been conceived with assisted reproductive technologies (ART). Because the primary outcome of assisted reproduction procedures is delivery at term of a live, healthy baby, the postnatal effects occurring outside ofthe neonatal period are often overlooked. To this end, the long-term outcome of ART is appropriately the most relevant concern of the field today. Evidence of adverse consequences is controversial. The majority of studies have concluded no obvious problems in IVF-conceived children, although a number of isolated cases of imprinted diseases, cancers, or malformations have been reported. Given that animal studies suggest alteration of metabolic pathways following preimplantation stress, it will be of great importance to follow-up ART individuals as they enter later stages of adult life.

The evidence base for the cues program for mothers of very low birth weight infants: an innovative approach to reduce anxiety and support sensitive interaction

Very low birth weight (VLBW) infants, born weighing less than 1,500 g, are at risk for several developmental problems. Consequently, there has been interest in developing intervention programs to prevent such problems. This article describes the empirical evidence that guided the development of an innovative, multicomponent intervention program for mothers of VLBW infants, as well as the program content and features. Based on the evidence, the program was designed to include six sessions and commence shortly after birth to reduce maternal psychological distress during the infant's hospitalization in the neonatal intensive care unit and to promote sensitive mother-infant interaction. The program incorporates various learning activities, including written materials, observational exercises, discussion, and video feedback.

17-year outcome of preterm infants with diverse neonatal morbidities: Part 1--Impact on physical, neurological, and psychological health status

PURPOSE

The purpose of this study was to comprehensively examine physical, neurological, and psychological health in a U.S. sample of 180 infants at age 17.

DESIGN AND METHODS

The World Health Organization International Classification of Functioning, Disability and Health model framed the health-related domains and contextual factors. Assessments included growth, chronic conditions, neurological status, and psychological health.

RESULTS

Physical health, growth, and neurological outcomes were poorer in the preterm groups. Minor neurological impairment was related to integrative function. Preterm survivors reported higher rates of depression, anxiety, and inattention/hyperactivity.

PRACTICE IMPLICATIONS

Complex health challenges confront preterm survivors at late adolescence, suggesting the necessity of continued health surveillance.

Preterm delivery and low birth weight in singleton pregnancies conceived by women with and without a history of infertility

OBJECTIVE

To determine predictors of low birth weight (LBW) and preterm delivery (PTD) in singleton pregnancies conceived by women with and without a history of infertility.

DESIGN

Retrospective cohort study.

SETTING

Eleven infertility clinics in northern California.

PATIENT(S)

Three groups of women who carried singleton pregnancies to ≥20 weeks' gestation: 542 infertile women who conceived after treatment, 441 infertile women who conceived spontaneously, and 1,008 fertile women for comparison.

INTERVENTION(S)

Chart review.

MAIN OUTCOME MEASURE(S)

Association of LBW or PTD with infertility treatment, maternal age, parity, obesity, or development of gestational diabetes.

RESULT(S)

Infertile women who conceived with treatment were more likely to be obese, develop gestational diabetes, and have ovarian, ovulatory, or male factor infertility than infertile women who conceived spontaneously. Infertile women who conceived after treatment had 1.61 times greater odds of having an LBW infant. Nulliparity was an independent predictor of LBW and PTD in all three groups after controlling for maternal age, history of infertility, infertility treatment, obesity, and gestational diabetes.

CONCLUSION(S)

Nulliparous women and women with a history of infertility who conceive a singleton after treatment may be at increased odds for having an LBW infant. Infertile women do not appear to be at increased odds for PTD.

Regulation of corticoid and serotonin receptor brain system following early life exposure of glucocorticoids: long term implications for the neurobiology of mood

Potent glucocorticoids (GC) administered early in life have improved premature infant survival dramatically. However, these agents may increase the risk for physical, neurological and behavior alterations. Anxiety, depression and attention difficulties are commonly described in adolescent and young adult survivors of prematurity. In the present study we administered vehicle, dexamethasone, or hydrocortisone to Sprague-Dawley rat pups on postnatal days 5 and 6, mimicking a short term clinical protocol commonly used in human infants. Two systems that are implicated in the regulation of stress and behavior were assessed: the limbic-hypothalamic-pituitary-adrenal axis [LHPA; glucocorticoid and mineralocorticoid receptors within] and the Serotonin (5-HT) system. We found that as adults, male Sprague-Dawley pups treated with GC showed agent specific altered growth, anxiety-related behavior, changes in corticoid response to novelty and gene expression changes within LHPA and 5-HT-related circuitry. The data suggest that prolonged GC-receptor stimulation during the early neonatal period can contribute to the development of individual differences in stress response and anxiety-related behavior later in life.

Clinical use of a modified release methylphenidate in the treatment of childhood attention deficit hyperactivity disorder

Attention deficit hyperactivity disorder (ADHD) is the most commonly diagnosed neurobehavioural disorder in childhood, affecting over 5% of children worldwide. As well as the core symptoms of inattention, hyperactivity and impulsivity, patients often exhibit learning difficulties and impairment in social functioning. The frequency of referral is higher for boys than for girls (about 2:1), and girls are generally older at the time of referral.Pharmacological therapy is considered the first-line treatment for patients with severe ADHD and severe impairment. Stimulant medications are licensed in the UK for the management of ADHD in school-age children and young people, and are effective in controlling ADHD symptoms.While immediate-release preparations of methylphenidate (MPH) have proven effective in the treatment of ADHD, there are a number of problems associated with their use, most notably compliance, stigma and medication diversion. Modified release preparations are now available that overcome the need for multiple daily dosing, and which offer different MPH release profiles, thereby enabling the physician to match the medication to the patient's particular requirements.This review describes the diagnosis, referral and treatment pathways for patients with ADHD in the UK and the practical considerations when initiating pharmacological treatment. The clinical experience of treating ADHD with a modified-release MPH preparation (Equasym XL®) is illustrated with case studies.

Tamanho ao nascer e problemas de saúde mental aos 11 anos em uma coorte brasileira de nascimentos

O objetivo foi avaliar a associação entre tamanho ao nascer e problemas de saúde mental aos 11 anos na Coorte de Nascimentos de Pelotas, Rio Grande do Sul, Brasil, de 1993. Foram pesados e medidos ao nascer 4.358 recém-nascidos. Avaliou-se problemas de saúde mental com o questionário de capacidades e dificuldades (Strengths and Difficulties Questionnaire - SDQ). A prevalência de problemas de saúde mental foi de 32% (IC95%: 31-33). Na análise ajustada, os 291 (6,7%) recém-nascidos com escorez de peso/idade e os 268 (6,2%) com índice de massa corporal (IMC)/idade < -2 DP tiveram, respectivamente, 27% (IC95%: 7-49) e 29% (IC95%: 10-51) maior risco de apresentar problemas de saúde mental aos 11 anos quando comparados com aqueles com escore normal. Os 102 (2,43%) recém-nascidos com escorez de IMC e os 279 (6,4%) com perímetro cefálico/idade > +2 DP tiveram, respectivamente, 34% (IC95%: 6-71) e 19% (IC95%: 1-40) maior risco de apresentar esses problemas se comparados com aqueles com escore normal. Os resultados sugerem que fatores ocorridos na gestação e refletidos nas medidas de tamanho ao nascer podem ocasionar problemas de saúde mental em etapas tardias.

Consequence of preterm birth in early adolescence: the role of language on auditory short-term memory

This study tested the hypothesis that preterm early adolescents' short-term memory is compromised when presented with increasingly complex verbal information and that associated neuroanatomical volumes would differ between preterm and term groups. Forty-nine preterm and 20 term subjects were evaluated at age 12 years with neuropsychological measures and magnetic resonance imaging (MRI). There were no differences between groups in simple short-term and working memory. Preterm subjects performed lower on learning and short-term memory tests that included increased verbal complexity. They had reduced right parietal, left temporal, and right temporal white matter volumes and greater bilateral frontal gray and right frontal white matter volumes. There was a positive association between complex working memory and the left hippocampus and frontal white matter in term subjects. While not correlated, memory scores and volumes of cortical regions known to subserve language and memory were reduced in preterm subjects. This study provides evidence of possible mechanisms for learning problems in former preterm infants.

Cerebral MRI and cognition in nonhandicapped, low birth weight adults

This study sought to compare cognitive and cerebral findings of magnetic resonance imaging in young adults with low birth weights and in a control group. One hundred thirteen of 173 (65%) eligible adults with birth weights <2000 g, and 100 of 170 (59%) controls, all without major disabilities, were examined at age 19 years. Cerebral 3.0 T magnetic resonance imaging was performed according to standardized protocols. Prorated intelligence quotient was estimated from two subtests of the Wechsler Abbreviated Scale of Ability, a word comprehension test, and matrices. Prominent lateral ventricles and loss of white matter, and thinning of the corpus callosum, were more common in the low birth weight group than in the control group (40% vs. 15%, respectively; odds ratio, 3.8; P < 0.001; and 31% vs. 7%, respectively; odds ratio, 6.0; P < 0.001). Low birth weight adults exhibited lower mean intelligence quotients (95 vs. 101, respectively; P < 0.001). Low birth weight adults face an increased risk of prominent ventricles, global loss of white matter, and thinning of the corpus callosum. Similar magnetic resonance imaging findings are not uncommon among healthy adults.

Alterations in cortical GABAB receptors in neonatal rats exposed to hypoxic stress: role of glucose, oxygen, and epinephrine resuscitation

Hypoxia in neonates can cause permanent brain damage by gene and receptor level alterations mediated through changes in neurotransmitters. The present study evaluated GABA(B) receptor alterations, gene expression changes in glutamate decarboxylase and hypoxia-inducible factor 1A in the cerebral cortex of hypoxic neonatal rats and the resuscitation groups with glucose, oxygen, and epinephrine. Under hypoxic stress, a significant decrease in total GABA and GABA(B) receptors, GABA(B) and GAD gene expression was observed in the cerebral cortex, which accounts for the respiratory inhibition. Hypoxia-inducible factor 1A was upregulated under hypoxia to maintain body homeostasis. Hypoxic rats supplemented with glucose alone and with oxygen showed a reversal of the receptor alterations and changes in GAD and HIF-1A to near control. Being a source of immediate energy, glucose can reduce the ATP-depletion-induced changes in GABA and oxygenation, which helps in encountering hypoxia. Resuscitation with oxygen alone and epinephrine was less effective in reversing the receptor alterations. Thus, our study suggests that reduction in the GABA(B) receptors functional regulation during hypoxia plays an important role in cortical damage. Resuscitation with glucose alone and glucose and oxygen to hypoxic neonatal rats helps in protecting the brain from severe hypoxic damage.

Hypoxic injury during neonatal development in murine brain: correlation between in vivo DTI findings and behavioral assessment

Preterm birth results in significant neurodevelopmental disability. A neonatal rodent model of chronic sublethal hypoxia (CSH), which mimics effects of preterm birth, was used to characterize neurodevelopmental consequences of prolonged exposure to hypoxia using tissue anisotropy measurements from diffusion tensor imaging. Corpus callosum, cingulum, and fimbria of the hippocampus revealed subtle, yet significant, hypoxia-induced modifications during maturation (P15-P51). Anisotropy differences between control and CSH mice were greatest at older ages (>P40) in these regions. Neither somatosensory cortex nor caudate putamen revealed significant differences between control and CSH mice at any age. We assessed control and CSH mice using tests of general activity and cognition for behavioral correlates of morphological changes. Open-field task revealed greater locomotor activity in CSH mice early in maturation (P16-P18), whereas by adolescence (P40-P45) differences between control and CSH mice were insignificant. These results may be associated with lack of cortical and subcortical anisotropy differences between control and CSH mice. Spatial-delayed alternation and free-swim tasks in adulthood revealed lasting impairments for CSH mice in spatial memory and behavioral laterality. These differences may correlate with anisotropy decreases in hippocampal and callosal connectivities of CSH mice. Thus, CSH mice revealed developmental and behavioral deficits that are similar to those observed in low birth weight preterm infants.

Psychopathology among preterm infants using the Diagnostic Classification Zero to Three

AIM

To compare the prevalence of psychopathology in infants born preterm with matched full-term infants at the corrected age of 1 year.

METHODS

Between June 2003 and April 2005, a case-control longitudinal cohort study was conducted at the neonatal unit of the University Hospital of Antwerp, Belgium. We prospectively enrolled 123 live-born infants between 25 and 35 weeks of gestation and/or infants with a birth-weight of <1500 g. Thirty full-term infants were recruited among day care centres in the region. Diagnoses were based on the Diagnostic Classification Zero to Three (DC: 0-3), using the MacArthur Communicative Developmental Inventory Dutch version, Infant-Toddler Sensory Profile, Bayley Scales of Infant Development II, Parent Infant Relationship Global Assessment Scale and Functional Emotional Assessment Scale.

RESULTS

At the (corrected) age of 12 months, 89 infants were eligible for follow-up and complete data were available for 69 (77%) infants. Fifty-four percentage of the preterm infants fulfilled one or more DC 0-3 diagnoses. Premature infants had significantly more diagnoses than full-term infants on axis I, axis III and axis V of the DC: 0-3.

CONCLUSION

In this study, the prevalence of psychopathology was significantly higher among preterm infants in comparison with full-term infants. This study did not confirm previous findings of higher rates of relationship disorders among preterm infants.

Growth mixture modeling of academic achievement in children of varying birth weight risk

The extremes of birth weight and preterm birth are known to result in a host of adverse outcomes, yet studies to date largely have used cross-sectional designs and variable-centered methods to understand long-term sequelae. Growth mixture modeling (GMM) that utilizes an integrated person- and variable-centered approach was applied to identify latent classes of achievement from a cohort of school-age children born at varying birth weights. GMM analyses revealed 2 latent achievement classes for calculation, problem-solving, and decoding abilities. The classes differed substantively and persistently in proficiency and in growth trajectories. Birth weight was a robust predictor of class membership for the 2 mathematics achievement outcomes and a marginal predictor of class membership for decoding. Neither visuospatial-motor skills nor environmental risk at study entry added to class prediction for any of the achievement skills. Among children born preterm, neonatal medical variables predicted class membership uniquely beyond birth weight. More generally, GMM is useful in revealing coherence in the developmental patterns of academic achievement in children of varying weight at birth and is well suited to investigations of sources of heterogeneity.

What causes racial disparities in very preterm birth? A biosocial perspective

Very preterm birth (<32 weeks' gestation) occurs in approximately 2% of livebirths but is a leading cause of infant mortality and morbidity in the United States. African-American women have a 2-fold to 3-fold elevated risk compared with non-Hispanic white women for reasons that are incompletely understood. This paper reviews the evidence for the biologic and social patterning of very preterm birth, with attention to leading hypotheses regarding the etiology of the racial disparity. A systematic review of the literature in the MEDLINE, CINAHL, PsycInfo, and EMBASE indices was conducted. The literature to date suggests a complex, multifactorial causal framework for understanding racial disparities in very preterm birth, with maternal inflammatory, vascular, or neuroendocrine dysfunction as proximal pathways and maternal exposure to stress, racial differences in preconceptional health, and genetic, epigenetic, and gene-environment interactions as more distal mediators. Interpersonal and institutionalized racism are mechanisms that may drive racially patterned differences. Current literature is limited in that research on social determinants and biologic processes of prematurity has been generally disconnected. Improved etiologic understanding and the potential for effective intervention may come with better integration of these research approaches.

Psychiatric morbidity in adolescents and young adults born preterm: a Swedish national cohort study

OBJECTIVE

Increasing numbers of infants born preterm survive into adulthood. Previous studies have reported increased levels of neurologic and cognitive disabilities in these children. In this study, we analyzed the effect of having been born preterm on psychiatric morbidity.

METHODS

A Swedish national cohort of 545628 individuals born in 1973-1979 was followed up in the national registers during 1987-2002. Multivariate Cox analysis of proportional hazards was used to estimate the hazard ratios of hospital admissions for psychiatric disorders and alcohol/illicit drug abuse.

RESULTS

There was a stepwise increase in psychiatric hospital admissions with an increasing degree of preterm birth. A total of 5.2% of children born at 24 to 28 weeks' gestation and 3.5% born at 29 to 32 weeks' gestation had been hospitalized because of a psychiatric disorder. The hazard ratios for psychiatric disorders were 1.68 in the group of very preterm children (gestational weeks 24-32), 1.21 in the moderately preterm group (gestational weeks 33-36), and 1.08 in the early term group (gestational weeks 37-38) after adjustment for socioeconomic confounders. Moderately preterm and early term birth accounted for 85% of the risk attributed to preterm/early term birth. The effect of preterm birth was greater in households with low socioeconomic status.

CONCLUSION

Preterm birth carries some risk for psychiatric disorders requiring hospitalization in adolescence and young adulthood (ages 8-29 years). Even if this risk increases with degree of preterm birth, most subjects are moderately preterm, a group in need of more attention in research and secondary prevention.

EEG functional connectivity in term age extremely low birth weight infants

OBJECTIVE

The hypothesis is tested that electrocortical functional connectivity (quantified by coherence) of extremely low birth weight (ELBW) infants, measured at term post-menstrual age, has regional differences from that of full term infants.

METHODS

128 lead EEG data were collected during sleep from 8 ELBW infants with normal head ultrasound exams and 8 typically developing full term infants. Regional spectral power and coherence were calculated.

RESULTS

No significant regional differences in EEG power were found between infant groups. However, compared to term infants, ELBW infants had significantly reduced interhemispheric coherence (in frontal polar and parietal regions) and intrahemispheric coherence (between frontal polar and parieto-occipital regions) in the 1-12Hz band but increased interhemispheric coherence between occipital regions in the 24-50Hz band.

CONCLUSIONS

ELBW infants at term post-menstrual age manifest regional differences in EEG functional connectivity as compared to term infants.

SIGNIFICANCE

Distinctive spatial patterns of electrocortical synchrony are found in ELBW infants. These regional patterns may presage regional alterations in the structure of the cortex.

The Cues and Care Trial: a randomized controlled trial of an intervention to reduce maternal anxiety and improve developmental outcomes in very low birthweight infants

BACKGROUND

Very low birthweight infants are at risk for deficits in cognitive and language development, as well as attention and behaviour problems. Maternal sensitive behaviour (i.e. awareness of infant cues and appropriate responsiveness to those cues) in interaction with her very low birthweight infant is associated with better outcomes in these domains; however, maternal anxiety interferes with the mother's ability to interact sensitively with her very low birthweight infant. There is a need for brief, cost-effective and timely interventions that address both maternal psychological distress and interactive behaviour. The Cues and Care trial is a randomized controlled trial of an intervention designed to reduce maternal anxiety and promote sensitive interaction in mothers of very low birthweight infants.

METHODS AND DESIGN

Mothers of singleton infants born at weights below 1500 g are recruited in the neonatal intensive care units of 2 tertiary care hospitals, and are randomly assigned to the experimental (Cues) intervention or to an attention control (Care) condition. The Cues intervention teaches mothers to attend to their own physiological, cognitive, and emotional cues that signal anxiety and worry, and to use cognitive-behavioural strategies to reduce distress. Mothers are also taught to understand infant cues and to respond sensitively to those cues. Mothers in the Care group receive general information about infant care. Both groups have 6 contacts with a trained intervener; 5 of the 6 sessions take place during the infant's hospitalization, and the sixth contact occurs after discharge, in the participant mother's home. The primary outcome is maternal symptoms of anxiety, assessed via self-report questionnaire immediately post-intervention. Secondary outcomes include maternal sensitive behaviour, maternal symptoms of posttraumatic stress, and infant development at 6 months corrected age.

DISCUSSION

The Cues and Care trial will provide important information on the efficacy of a brief, skills-based intervention to reduce anxiety and increase sensitivity in mothers of very low birthweight infants. A brief intervention of this nature may be more readily implemented as part of standard neonatal intensive care than broad-based, multi-component interventions. By intervening early, we aim to optimize developmental outcomes in these high risk infants.

TRIAL REGISTRATION

Current Controlled Trials ISRCTN00918472. The Cues and Care Trial: A randomized controlled trial of an intervention to reduce maternal anxiety and improve developmental outcomes in very low birthweight infants.

Social lifestyle, risk-taking behavior, and psychopathology in young adults born very preterm or with a very low birthweight

OBJECTIVE

To assess social lifestyle, risk-taking behavior, and psychopathology in young adults born very preterm or with a very low birthweight.

STUDY DESIGN

This study was part of the 19-year follow-up in a large ongoing collaborative study in The Netherlands (the POPS study) on the long-term outcome of prematurity and dysmaturity. 656 adolescents from the POPS study without serious handicap were compared with peers in the general population in lifestyle, risk-taking behavior, psychopathology, and social participation.

RESULTS

Adolescents from the POPS study smoked significantly less than their peers. Compared with their peers, boys from the POPS study consumed alcohol less often, and girls from the POPS study consumed alcohol approximately as often. Lifetime drug-use was significantly lower than in the reference group. With the exception of fare-dodging, criminal behavior in POPS adolescents was significantly lower than in control subjects. Boys had more trouble in establishing a relationship. The clinical psychopathology reported by POPS subjects was not significantly higher than in control subjects.

CONCLUSION

Adolescents born very preterm or with a very low birthweight without serious disabilities engaged less in risk-taking behavior, did not show more psychopathology, but had more difficulties in establishing social contacts. The latter might be attributable to a more prominent internalizing behavior.

Personality of young adults born prematurely: the Helsinki study of very low birth weight adults

BACKGROUND

Today, the first generations of very low birth weight (VLBW <or= 1500 g) infants are entering adulthood but very little is known of their personality traits, associated with both psychopathological vulnerability and resilience.

METHODS

In this cohort study we compared personality traits among young adults (age range 18 to 27 years, mean 21.4, SD 2.19) with VLBW (n = 158) with those of term-born controls (n = 168) of same gender, age, and maternity hospital. The participants completed the Neo-Personality Inventory.

RESULTS

Of the five main traits, the VLBW participants scored significantly higher in conscientiousness (MD .1, 95% CI .0 to .3; p < .03), agreeableness (MD .2, 95% CI .0 to .3; p < .001), and lower in openness to experience (MD -.1, 95% CI -.2 to .0; p < .02). In addition, the VLBW group differed from the controls with regard to facets of neuroticism (lower hostility and impulsivity, ps < .05) and extraversion (less assertiveness p < .01). Furthermore, there were fewer undercontrolled personality profiles among the VLBW subjects (p < .01). All differences were independent of gender, age at assessment, parental education, individual school grade average, and maternal pre-eclampsia and smoking during pregnancy.

CONCLUSIONS

Young adults born with VLBW showed markedly different personality traits compared with their controls. The VLBW group displayed less negative emotions, were more dutiful and cautious, and displayed more warmth in their social relationships than their term-born peers. We present two potential mechanisms underlying these findings. The first relates to parental influences and the other to evidence linking biological mechanisms associated with prematurity with personality characteristics in adulthood.

Rates of early intervention services in very preterm children with developmental disabilities at age 2 years

AIM

Preterm birth is increasing in prevalence and long-term follow-up studies have documented high rates of neurosensory, intellectual, academic and behavioural disabilities. The importance of early intervention (EI) is well recognised but significant barriers to receiving EI exist in the community. This study explores the association of levels of disability at age 2 years with EI services and social risk in a large cohort of very preterm children.

METHODS

This was a cohort study of 236 very preterm (gestational age < 30 weeks or birthweight < 1250 g) infants recruited at birth. Children were assessed comprehensively at age 2 years, and EI and social risk data were gathered via parental questionnaire. Disability levels were assigned as none, mild, or moderate to severe. The relationships of disability level to EI services and social risk were determined.

RESULTS

Of the initial cohort, data from 227 (97%) were available at age 2 years. Overall, 50.7% (115/227) of children had some disability. A significant difference was present (P < 0.001) between the rates of EI and disability, with only 27.9% of children with a mild disability receiving EI services compared with 51.1% of children with a moderate to severe disability. After adjustment for level of disability, those of higher social risk were less likely to receive EI services (odds ratio 0.25; 95% confidence interval 0.11-0.56; P = 001).

CONCLUSIONS

Currently available follow-up, referral and EI services underserve the most vulnerable children in our community, those with a combination of biological and social risk factors for developmental disabilities.

Positive screening for autism in ex-preterm infants: prevalence and risk factors

OBJECTIVE

The survival of very low birth weight infants has increased markedly in recent years. Unfortunately, the prevalence of significant and lifelong motor, cognitive, and behavioral dysfunction has remained a major problem confronting these children. The objective of this study was to perform screening tests for early autistic features in children with a history of very low birth weight and to identify risk factors associated with a positive screening result.

METHODS

We studied 91 ex-preterm infants < or = 1500 g at birth. Infants underwent conventional MRI studies at preterm and/or term-adjusted age. We collected pertinent demographic, prenatal, intrapartum, acute postnatal, and short-term outcome data for all infants. Follow-up assessments were performed at a mean age of 21.9 +/- 4.7 months, using the Modified Checklist for Autism in Toddlers, the Vineland Adaptive Behavior Scale, and the Child Behavior Checklist.

RESULTS

Twenty-six percent of ex-preterm infants had a positive result on the autism screening tool. Abnormal scores correlated highly with internalizing behavioral problems on the Child Behavior Checklist and socialization and communication deficits on the Vineland Scales. Lower birth weight, gestational age, male gender, chorioamnionitis, acute intrapartum hemorrhage, illness severity on admission, and abnormal MRI studies were significantly associated with an abnormal autism screening score.

CONCLUSIONS

Early autistic behaviors seem to be an underrecognized feature of very low birth weight infants. The results from this study suggest that early screening for signs of autism may be warranted in this high-risk population followed by definitive autism testing in those with positive screening results.

Impact of being small-for-gestational age on survival and long-term outcome of extremely premature infants born at 23-27 weeks' gestation

AIM

To evaluate factors affecting survival and long-term outcome of extremely premature infants and to determine whether small for gestational age (SGA) status is an additional risk factor.

METHODS

Survival was analyzed in 193 infants born between 23 and 27 weeks of gestational age (GA) and compared between SGA (n=43) and appropriate for gestational age (AGA) infants. Long-term outcome was assessed in 123 infants at six years of chronological age by neurological evaluation and cognitive tests.

RESULTS

The long-term survival rates were 72.1% for SGA and 84.0% for AGA infants. Significant independent factors affecting survival were GA (OR 1.79 for one week advance, 95% CI 1.36-2.34) and SGA (OR 0.42, 95% CI 0.18-0.997) in comparison with AGA. There were no significant differences in rates of cerebral palsy or mental retardation, 12.0% and 24.0% in SGA, 14.3% and 17.3% in AGA, respectively. Fifty-two percent of SGA and 70% of AGA infants had intact long-term outcome. The perinatal factor found to affect the intact long-term outcome was RDS with surfactant therapy (OR 0.17, 95% CI 0.07-0.45).

CONCLUSION

SGA status as well as short gestation had significant effects on survival. Respiratory complications after birth had a larger detrimental effect on long-term outcome than whether the infant was SGA or AGA.

Growth and development are similar in VLBW children born appropriate and small for gestational age: an interim report on 97 preschool children

AIM

To investigate growth and development in a cohort of children born with very low birth weight (VLBW) treated at a single tertiary neonatal unit.

METHODS

We studied 97 children born between January 1995 and July 1997 with BW <1,500 g. At follow-up (mean age 3.7 years) anthropometric data and data on neurological status, motor, speech and language development were collected. Small for gestational age (SGA) was defined as weight and/or length at birth <10th percentile; shortness at follow-up was defined as height <10th percentile.

RESULTS

Comparison was made between the appropriate for gestational age (AGA) (n = 46) and SGA (n = 51) groups. At follow-up, 23 AGA and 35 SGA children were short, had a smaller head circumference (-1.9 vs -0.8 SDS), were lighter at birth (BW -1.3 vs -0.7 SDS), and had a higher rate of broncho-pulmonary dysplasia (BPD) (28 vs 12); no differences in neonatal characteristics or neurological status were evident. A higher frequency of motor delay occurred in the 'short' group. Short children also had a smaller head circumference (HC) (-1.6 vs -0.7). Short SGA children had a higher frequency of BPD, smaller HC (-2.1 vs -1.0), and a slightly higher proportion of suspicious neurological findings, motor delay, and speech and language delay (n.s.).

CONCLUSIONS

Preterm VLBW infants, whether AGA or SGA at birth, face the risk of being short at preschool age. Height outcome is probably influenced by postnatal factors. Our data also suggest that short stature is associated with developmental difficulties in this population.

Impaired executive functioning in young adults born very preterm

Individuals born very preterm (VPT) are at increased risk of perinatal brain injury and long-term cognitive and behavioral problems. Executive functioning, in particular, has been shown to be impaired in VPT children and adolescents. This study prospectively assessed executive function in young adults who were born VPT (<33 weeks of gestation) [n = 61; mean age, 22.25 (+/-1.07) years; range, 20.62-24.78 years] and controls [n = 64; mean age, 23.20 (+/-1.48) years; range, 19.97-25.46 years]. Tests used comprised the Wechsler Abbreviated Scale of Intelligence (WASI), the Hayling Sentence Completion Test (HSCT), the Controlled Oral Word Association Test (COWAT), the Animal and Object test, the Trail-Making Test (TMT), and the Test of Attentional Performance (TAP). VPT participants showed specific executive function impairments in tasks involving response inhibition and mental flexibility, even when adjusting for IQ, gender, and age. No significant associations were observed between executive function test scores and perinatal variables or neonatal ultrasound classification. The results suggest that, although free from major physical disability, VPT young adults perform worse than controls on tasks involving selective aspects of executive processing, such as mental flexibility and response inhibition.

Concordance between school outcomes and developmental follow-up results of very preterm and/or low birth weight children at the age of 5 years

INTRODUCTION

Long-term follow-up studies have revealed a high frequency of developmental disturbances in preterm survivors of neonatal intensive care who were formerly considered to be non-disabled. These developmental disturbances interfere with the acquisition of everyday skills and, in particular, with normal school functioning.

METHODS

Developmental and school outcomes of 355 children, age 5 years at the time of the study, who had a mean gestational age of 30.2 weeks (SD: 1.95) and a mean birth weight of 1272 g (SD: 326) were investigated. Children with severe handicaps were excluded from the study. Perinatal data, information from a parental and school questionnaire and data from standardized developmental tests were used to explain the differences.

RESULTS

An agreement of 72% was found between developmental follow-up and school outcomes. Normal developmental results but problematic school outcomes were found for 15% of the children tested. There were more boys than girls in this latter group as well as small-for-gestational-age children with relatively poor motor or language development. The schools had not identified problems in 13% of the children, whereas their developmental outcomes were problematic. These children had less neonatal morbidity and relatively higher IQ's than children who also had problematic developmental outcomes but who had been signalled as problematic by their schools.

CONCLUSIONS

Schools have a good insight in the school functioning of children who are developing well and of children with the lowest developmental scores and the most complicated neonatal histories. How school and developmental outcomes interrelate in the in-between groups remains a challenging question that could be answered by following these children throughout their school career.

Crescimento de prematuros de extremo baixo peso nos primeiros dois anos de vida

OBJETIVO: Analisar o padrão de crescimento de prematuros de extremo baixo peso (EBP) até 24 meses de idade corrigida, a influência da displasia broncopulmonar (DBP) e os fatores de risco para falha de crescimento. MÉTODOS: Coorte de prematuros <1.000g de gestação única, nascidos e acompanhados em um centro terciário. O crescimento foi avaliado por meio de escores-z para peso, comprimento e perímetro cefálico ao nascimento, com 40 semanas, aos 3, 6, 12, 18 e 24 meses de idade corrigida. Dentre 81 sobreviventes, 70 foram estudados e estratificados em dois grupos: DBP (n=41) e sem DBP (n=29). Foi realizada análise bivariada com teste t ou Mann-Whitney, qui-quadrado ou Exato de Fisher, e análise multivariada com regressão logística. RESULTADOS: Em ambos os grupos, o escore-z de peso diminuiu significantemente entre o nascimento e 40 semanas. Houve um pico de incremento nos escores-z de peso, comprimento e perímetro cefálico entre 40 semanas e três meses. No grupo sem DBP, os escores-z atingiram a faixa normal a partir dos seis meses e assim permaneceram até 24 meses de idade corrigida. Crianças com DBP tiveram menores escores-z de peso e perímetro cefálico no primeiro ano, mas equipararam-se às sem DBP no segundo ano de vida. A regressão logística mostrou que catch-down no escore-z de peso com 40 semanas foi fator de risco para falha de crescimento. CONCLUSÕES: Prematuros EBP apresentam catch-up precoce do crescimento nos primeiros dois anos. Crianças com DBP têm pior crescimento ponderal. A restrição do crescimento pós-natal prediz a falha de crescimento nos primeiros anos.

The Impact of Periventricular Brain Injury on Reading and Spelling Abilities in the Late Elementary and Adolescent Years

The present study was designed: (1) to investigate the long-term consequences of both the presence and the severity of periventricular brain injury (PVBI) on intellectual, academic, and cognitive outcome in extremely-low-birthweight (ELBW: < 1,000 grams) children at a mean age of 11 years; and (2) to determine the nature of the underlying difficulties associated with academic problems in these children. The results indicated that ELBW children without PVBI performed as well as full-term children on intelligence, academic, and cognitive ability tests. In contrast, ELBW children with mild and severe PVBI achieved significantly lower scores than either ELBW children without PVBI or children who were born at term. A second analysis indicated that, after accounting for Full Scale IQ, working memory and phonological processing were significant predictors of reading and spelling performance in ELBW children. These findings suggest that the presence and severity of PVBI, and not ELBW status alone, is associated with performance on tests of intelligence, and academic and cognitive functioning, and that some of the same factors known to be associated with learning disabilities in full-term children contribute to learning disabilities in ELBW children.

Emotional, behavioral, social, and academic outcomes in adolescents born with very low birth weight

BACKGROUND

Very low birth weight survivors are at increased risk of developing emotional and behavioral problems and low social and academic competencies. Information on such problems in very low birth weight adolescents is still sparse.

OBJECTIVES

Our purpose for this work was to study gender-specific emotional and behavioral problems and social and academic competencies in a cohort of very low birth weight adolescents in north Norway.

METHODS

Families with very low birth weight adolescents aged 13 to 18 years, born between 1978 and 1989 (n = 162) were addressed by mail and asked to complete the Child Behavior Check List and the Youth Self-Report. Data were compared with 2 normative adolescent populations (Child Behavior Check List, n = 540; Youth Self-Report, n = 2522). Scores given by very low birth weight adolescents and their parents on identical items in Child Behavior Check List and Youth Self-Report (cross-informant syndrome constructs) were compared in pairs. To explore predictive effects, demographic and early medical characteristics were entered into a hierarchical multiple regression analysis.

RESULTS

There were 156 eligible families, and 99 (63.5%) responded. All completed the Child Behavior Check List, and 82 (52.6%) completed the Youth Self-Report. Very low birth weight boys reported less externalizing and internalizing behaviors and thought and attention problems and higher activity score, whereas very low birth weight girls reported less externalizing behavior and less social, thought, and attention problems and higher activity score compared with normative adolescents. Very low birth weight parents, however, reported more social and attention problems and less social and school competence in boys and more internalizing behavior and social and attention problems and less school competence in girls compared with normative parents. They scored high proportions of both genders within the borderline/clinical range on all of the scales, except for externalizing behavior and social problems in girls. Female very low birth weight adolescents, in contrast to males, reported more problems than parents when compared in pairs, and externalizing problems in particular were not recognized by parents.

CONCLUSIONS

From parents' point of view, significant proportions of very low birth weight adolescents experience more emotional and behavioral problems and less competence than normative adolescents. In contrast, very low birth weight adolescents state less problems and similar or higher competence than normative adolescents. Very low birth weight adolescent girls report more emotional and behavioral problems compared with their parents than very low birth weight adolescent boys do. Externalizing problems in very low birth weight adolescent girls are often not recognized by parents. To better understand these seemingly paradoxical findings and to develop adequate intervention programs, there is a need for prospective longitudinal studies.

Beneficial effects of breast milk in the neonatal intensive care unit on the developmental outcome of extremely low birth weight infants at 18 months of age

OBJECTIVE

Beneficial effects of breast milk on cognitive skills and behavior ratings have been demonstrated previously in term and very low birth weight infants. Extremely low birth weight infants are known to be at increased risk for developmental and behavior morbidities. The benefits of breast milk that is ingested in the NICU by extremely low birth weight infants on development and behavior have not been evaluated previously.

METHODS

Nutrition data including enteral and parenteral feeds were collected prospectively, and follow-up assessments of 1035 extremely low birth weight infants at 18 months' corrected age were completed at 15 sites that were participants in the National Institute of Child Health and Human Development Neonatal Research Network Glutamine Trial between October 14, 1999, and June 25, 2001. Total volume of breast milk feeds (mL/kg per day) during hospitalization was calculated. Neonatal characteristics and morbidities, interim history, and neurodevelopmental and growth outcomes at 18 to 22 months' corrected age were assessed.

RESULTS

There were 775 (74.9%) infants in the breast milk and 260 (25.1%) infants in the no breast milk group. Infants in the breast milk group were similar to those in the no breast milk group in every neonatal characteristic and morbidity, including number of days of hospitalization. Mean age of first day of breast milk for the breast milk infants was 9.3 +/- 9 days. Infants in the breast milk group began to ingest non-breast milk formula later (22.8 vs 7.3 days) compared with the non-breast milk group. Age at achieving full enteral feeds was similar between the breast milk and non-breast milk groups (29.0 +/- 18 vs 27.4 +/- 15). Energy intakes of 107.5 kg/day and 105.9 kg/day during the hospitalization did not differ between the breast milk and non-breast milk groups, respectively. At discharge, 30.6% of infants in the breast milk group still were receiving breast milk. Mothers in the breast milk group were significantly more likely to be white (42% vs 27%), be married (50% vs 30%), have a college degree (22% vs 6%), and have private health insurance (34% vs 18%) compared with the no breast milk group. Mothers who were black, had a low household income (< or = dollar 20000), or had higher parity were less likely to provide breast milk feeds. The analysis of outcomes between the any human milk and no human milk groups were adjusted for maternal age, maternal education, marital status, race/ethnicity, and the other standard covariates. Children in the breast milk group were more likely to have a Bayley Mental Development Index > or = 85, higher mean Bayley Psychomotor Development Index, and higher Bayley Behavior Rating Scale percentile scores for orientation/engagement, motor regulation, and total score. There were no differences in the rates of moderate to severe cerebral palsy or blindness or hearing impairment between the 2 study groups. There were no differences in the mean weight (10.4 kg vs 10.4 kg), length (80.5 cm vs 80.5 cm), or head circumference (46.8 cm vs 46.6 cm) for the breast milk and no breast milk groups, respectively, at 18 months. Multivariate analyses, adjusting for confounders, confirmed a significant independent association of breast milk on all 4 primary outcomes: the mean Bayley (Mental Development Index, Psychomotor Development Index, Behavior Rating Scale, and incidence of rehospitalization). For every 10-mL/kg per day increase in breast milk ingestion, the Mental Development Index increased by 0.53 points, the Psychomotor Development Index increased by 0.63 points, the Behavior Rating Scale percentile score increased by 0.82 points, and the likelihood of rehospitalization decreased by 6%. In an effort to identify a threshold effect of breast milk on Bayley Mental Development Index and Psychomotor Development Index scores and Behavior Rating Scale percentile scores, the mean volume of breast milk per kilogram per day during the hospitalization was calculated, and infants in the breast milk group were divided into quintiles of breast milk ingestion adjusted for confounders. Overall, the differences across the feeding quintiles of Mental Development Index and Psychomotor Development Index were significant. There was a 14.0% difference in Behavior Rating Scale scores between the lowest and highest quintiles. For the outcomes (Mental Development Index, Psychomotor Development Index, Behavior Rating Scale, and Rehospitalization <1 year), only the values for the >80th percentile quintile of breast milk feeding were significantly different from the no breast milk values. In our adjusted regression analyses, every 10 mL/kg per day breast milk contributed 0.53 points to the Bayley Mental Development Index; therefore, the impact of breast milk ingestion during the hospitalization for infants in the highest quintile (110 mL/kg per day) on the Bayley Mental Development Index would be 10 x 0.53, or 5.3 points.

CONCLUSIONS

An increase of 5 points potentially would optimize outcomes and decrease costs by decreasing the number of very low birth weight children who require special education services. The societal implications of a 5-point potential difference (one third of an SD) in IQ are substantial. The potential long-term benefit of receiving breast milk in the NICU for extremely low birth weight infants may be to optimize cognitive potential and reduce the need for early intervention and special education services.

A randomized, controlled trial of the effectiveness of an early-intervention program in reducing parenting stress after preterm birth

BACKGROUND

Preterm birth has been associated with increased parenting stress in early infancy, and some reports have found this to be a risk factor for later behavioral problems. There are, however, few studies and conflicting results. Information about the fathers is scarce.

OBJECTIVES

Our goal was to study the effects of an early-intervention program on parenting stress after a preterm birth until 1 year corrected age.

METHODS

A randomized, controlled trial was conducted including infants with a birth weight <2000 g treated at the University Hospital of North Norway Trust, which serves the 2 northern-most counties in Norway, to examine the effects of a modified version of the Mother-Infant Transaction Program on parenting stress measured by the Parenting Stress Index. A term control group was also recruited. The Parenting Stress Index was administered to the mothers at 6 and 12 months' corrected age and to the fathers at 12 months' corrected age. The intervention consisted of 8 sessions shortly before discharge and 4 home visits by specially trained nurses focusing on the infant's unique characteristics, temperament, and developmental potential and the interaction between the infant and the parents.

RESULTS

Seventy-one infants were included in the preterm intervention group, and 69 were included in the preterm control group. The preterm groups were well balanced. Seventy-four infants were included in the term control group. Compared with the preterm controls, both the mothers and fathers in the preterm intervention group reported significant lower scores in child domain, parent domain, and total stress on all occasions except the mother-reported child domain at 12 months. These differences were not related to birth weight or gestational age. The level of stress among the preterm intervention group was comparable to their term peers. Both parents in the intervention group reported consistently lower scores within the distractibility/hyperactivity, reinforces parents, competence, and attachment subscales compared with the preterm control group. There were no differences in mean summary stress scores between the mothers and fathers in the 2 preterm groups at 12 months, but the intraclass correlation coefficient was higher in the intervention group.

CONCLUSIONS

This early-intervention program reduces parenting stress among both mothers and fathers of preterm infants to a level comparable to their term peers. We are now studying whether this will result in long-term beneficial effects.