Mental health outcomes of adults born very preterm or with very low birth weight: A systematic review

Socioeconomic outcomes in very preterm/very low birth weight adults: individual participant data meta-analysis

BACKGROUND

Very preterm (VPT; <32 weeks) or very low birth weight (VLBW; <1500 g) birth is associated with socioeconomic disadvantages in adulthood; however, the predictors of these outcomes remain underexplored. This study examined socioeconomic disparities and identified neonatal and sociodemographic risk factors among VPT/VLBW individuals.

METHODS

A one-stage individual participant data meta-analysis was conducted using 11 birth cohorts from eight countries, comprising 1695 VPT/VLBW and 1620 term-born adults aged 18-30 years.

RESULTS

VPT/VLBW adults had lower odds of higher educational attainment (0.40[0.26-0.59]), remaining in education (0.63[0.47-0.84]) or paid work (0.76[0.59-0.97]), and higher odds of receiving social benefits (3.93[2.63-5.68]) than term-borns. Disparities in education and social benefits persisted after adjusting for age, sex, and maternal education, even among those without neurosensory impairments (NSI). Among VPT/VLBW adults, NSI significantly impacted all socioeconomic outcomes, increasing the odds of receiving social benefits 6.7-fold. Additional risk factors included medical complications, lower gestational age and birth weight, lower maternal education, younger maternal age, and non-white ethnicity.

CONCLUSIONS

NSI is the strongest risk factor for adulthood socioeconomic challenges in the VPT/VLBW population. Mitigating these disparities may require improved neonatal care to reduce NSI prevalence and targeted social and educational support for VPT/VLBW individuals.

IMPACT

Very preterm or very low birth weight (VPT/VLBW) birth is associated with socioeconomic disadvantages in adulthood, including lower educational attainment, lower employment rates, and a higher need for social benefits compared with individuals born at term. Neurosensory impairments are strongly associated with adverse socioeconomic outcomes among VPT/VLBW adults, while lower gestational age, lower birth weight, and sociodemographic disadvantages serve as additional risk factors. Early interventions in the NICU that reduce medical complications, along with enhanced educational support throughout childhood, may help mitigate long-term socioeconomic disparities for individuals born VPT/VLBW.

Maternal human papillomavirus infection and offspring neurodevelopmental disorders

BACKGROUND

Human papillomavirus (HPV) infection can lead to multiple comorbidities in women, including mental health problems. However, few studies have examined the association between maternal HPV infection and the risk of neurodevelopmental disorders in their offspring.

AIM

We aimed to investigate the association between maternal HPV infection and risk of attention-deficit hyperactivity disorder (ADHD) or autism spectrum disorder (ASD) among their offspring.

DESIGN AND METHODS

Data from the Taiwan National Health Insurance Research Database were used for analysis. Offspring of mothers with HPV infection were identified as the index group, and a demographic-matched group (offspring of mothers without HPV infection) was selected as the controls. The primary outcome was the risk of ADHD or ASD. Cox regression models with multiple adjustments were used to estimate hazard ratios (HRs) with 95% confidence intervals (CIs).

RESULTS

We included 7762 individuals in the index group and 31 048 in the control group. After adjusting for potential confounding factors, the index group had a higher risk of ADHD (HR: 1.39, 95% CI: 1.15-1.67) than the controls. Importantly, the risk remained significant when HPV infection was diagnosed either before (HR: 1.29, 95% CI: 1.05-1.59) or during pregnancy (HR: 1.79, 95% CI: 1.28-2.51). No increased risk of ASD was identified in the index group compared to the control group.

CONCLUSIONS

This study highlights the importance of preventing and treating HPV infection during and before pregnancy. Clinicians should be aware of the association between maternal HPV infection and ADHD in their offspring.

Health Outcomes 50 Years After Preterm Birth in Participants of a Trial of Antenatal Betamethasone

BACKGROUND AND OBJECTIVES

Preterm birth results in neonatal and childhood morbidity and mortality. Additionally, population-based studies show poorer cardiovascular health in adult survivors, but a full range of health outcomes has not been investigated into midlife. We aimed to assess the health outcomes after preterm vs term birth at 50 years in survivors of a randomized trial of antenatal betamethasone.

METHODS

Participants were asked to complete a health questionnaire and for consent to access administrative data. Participants deceased prior to follow-up were assessed with administrative data alone. The primary outcome was a composite: any of diabetes mellitus, prediabetes, treated hypertension, treated dyslipidemia, or a previous major adverse cardiovascular event. Secondary outcomes included respiratory, mental health, educational, and other health outcomes.

RESULTS

We included 470 participants: 424 assessed at mean age 49.3 years and 46 who died after infancy. The primary outcome occurred in 34.5% (112/325) of those born preterm and 29.9% (43/144) of those born at term; adjusted relative risk (aRR) 1.14 (95% CI, 0.85-1.54; P = .37). Cardiovascular events were less common in those born preterm (9/326 [2.8%] vs 10/144 [6.9%]; aRR 0.33, 95% CI, 0.14-0.79), while self-reported hypertension was more common (101/291 [34.7%] vs 23/116 [19.8%]; aRR 1.74, 95% CI, 1.16-2.61), although treated hypertension was not statistically significantly different (66/323 [20.4%] vs 22/143 [15.4%]; aRR 1.32, 95% CI, 0.84-2.06). Other components of the composite endpoint were similar between those born preterm and at term.

CONCLUSIONS

Those aged 50 years born preterm were more likely to have hypertension but had similar risk of diabetes, prediabetes, and dyslipidemia than those born at term, and their risk of cardiovascular events was lower.

Mental Health Outcomes of a National Cohort of Adults Born with Very Low Birthweight

Background: Children born with a very low birthweight (VLBW; <1500 g) and/or very preterm (VPT; <32 weeks) are at increased risk of mental health problems, but adult data are inconsistent. Objectives: We examined the prevalence of a range of mental health disorders in a national cohort of adults born with a VLBW, as well as associations between gestational age and mental health outcomes. Methods: All infants born with a VLBW in New Zealand in 1986 were followed prospectively from birth. The 12-month prevalence of mental health outcomes, in addition to substance use and violent/property offending were assessed at a median age of 28 years in this cohort relative to 100 full-term (FT) controls. Outcomes were assessed using structured interview methods. Results: There was a modest increase in the overall rate of mental health problems in VLBW adults compared to controls (ARR 1.33 [95% CI 0.83, 2.12]), reflecting slightly higher rates of anxiety disorders, notably agoraphobia (ARR 2.98 [0.64, 13.85]), social phobia (ARR 1.61 [0.71, 3.65]), and suicidal ideation/attempt (ARR 1.66 [0.45, 6.08]), but not depression (ARR 1.02 [0.57, 1.81]). There were no clear differences in substance use/offending outcomes. VLBW individuals born extremely preterm (<28 weeks) were most vulnerable to later mental health problems relative to controls (overall rate of mental health problems ARR 1.54 [0.86, 2.73]). Effect sizes for any anxiety disorder were also higher for VLBW females than VLBW males compared to same-sex controls. Conclusions: This population-based longitudinal cohort study showed that adults born preterm with a VLBW reported more mental health problems than FT controls; however, this difference was small. Pooled analyses involving larger sample sizes are needed, but findings suggest only modest individual and public health impacts of preterm birth on adult mental health functioning.

Interpregnancy intervals and behavioural outcomes in children: A population-based longitudinal study

BACKGROUND

While the physical health consequence of short interpregnancy intervals (IPIs) is well documented, its mental health impact is not well explored. This study aimed to examine the associations between IPIs and behavioural outcomes in children born following the interval at four developmental time points between ages 7 and 16.

METHODS

Our study sample comprised participants in the Avon Longitudinal Study of Parents and Children (ALSPAC) cohort, an ongoing population-based longitudinal birth cohort in Bristol, Avon, United Kingdom. Behavioural problems, including total behavioural difficulties, hyperactivity, emotional symptoms, conduct problems, peer-problems, and problems of pro-social behaviour, were assessed using the Strengths and Difficulties Questionnaire (SDQ). Over 2300 mothers and their singleton children were included in this study. Generalized Estimating Equations (GEE) were used to estimate odds ratios for the associations.

RESULTS

Children born to mothers with short IPI (<6 months) were 1.54 (95%CI: 1.12-2.11), 1.42 (95% CI: 1.12-1.81) and 1.37 (95%CI: 1.04-1.79) times more likely to have total behavioural difficulties, conduct problems and hyperactivity/inattention problems across the child's age, respectively, compared with children of mothers with IPIs of 18-23 months. We found no evidence of associations between short IPI (<6 months) and emotional symptoms, peer-relationship problems and pro-social behaviour problems.

CONCLUSION

Short IPI (<6 months) was associated with externalising (conduct and hyperactivity/inattention) but not internalising (emotional and peer-relationship problems) problems. Further studies are needed to confirm this association and elucidate the underlying mechanisms.

eHealth early intervention programs to support premature parents transitioning from NICU to home on parental and infant outcomes: a systematic review protocol

OBJECTIVE

This review will assess the effectiveness of eHealth early intervention programs in supporting premature infants and their parents transition from neonatal intensive care units (NICUs) to home and the impact of such programs on parental and infant outcomes.

INTRODUCTION

The literature has shown the benefits of eHealth early intervention programs to support premature infants and their parents after discharge from NICUs. Parents have reported benefits such as enhanced user-friendliness, increased confidence in infant care, satisfaction, and knowledge acquisition. However, the effectiveness of these programs on parental and infant outcomes remains unclear.

INCLUSION CRITERIA

This review will consider studies that assess any early intervention program using eHealth to support premature infants and their parents after discharge from NICU. The programs may be initiated during hospitalization or within the first month of discharge. The programs will include interventions that use eHealth components (eg, teleconsultation), either alone or in combination with face-to-face interventions (eg, home visits). This review will consider parental outcomes, including stress, anxiety, competence, and satisfaction, as well as infant outcomes, including health service utilization and cognitive, motor, and social development.

METHODS

This review will follow the JBI methodology for systematic reviews of effectiveness. The search strategy will aim to find both published and unpublished quantitative studies in English, Spanish, and Portuguese, without any geographical or cultural limitations. Two reviewers will independently perform study selection, critical appraisal, and data extraction. The results will be accompanied by a narrative synthesis. If possible, a meta-analysis will be conducted and the Summary of Findings will be presented using the GRADE (Grading of Recommendations Assessment, Development and Evaluation) approach.

REVIEW REGISTRATION

PROSPERO CRD42023444721.

Adolescent behavioral problems, preterm/low birth weight children and adult life success in a prospective Australian birth cohort study

BACKGROUND

Preterm and/or low birthweight (PT/LBW) is predictive of a range of adverse adult outcomes, including lower employment, educational attainment, and mental wellbeing, and higher welfare receipt. Existing studies, however, on PT/LBW and adult psychosocial risks are often limited by low statistical power. Studies also fail to examine potential child or adolescent pathways leading to later adult adversity. Using a life course framework, we examine how adolescent problem behaviors may moderate the association between PT/LBW and a multidimensional measure of life success at age 30 to potentially address these limitations.

METHODS

We analyze 2044 respondents from a Brisbane, Australia cohort followed from birth in1981-1984 through age 30. We examine moderation patterns using obstetric birth outcomes for weight and gestation, measures of problem behaviors from the Child Behavioral Checklist at age 14, and measures of educational attainment and life success at 30 using multivariable normal and ordered logistic regression.

RESULTS

Associations between PT/LBW and life success was found to be moderated by adolescent problem behaviors in six scales, including CBCL internalizing, externalizing, and total problems (all p < 0.01). In comparison, associations between LBW and educational attainment illustrate how a single-dimensional measure may yield null results.

CONCLUSION

For PT/LBW, adolescent problem behaviors increase risk of lower life success at age 30. Compared to analysis of singular outcomes, the incorporation of multidimensional measures of adult wellbeing, paired with identification of risk and protective factors for adult life success as children develop over the lifespan, may further advance existing research and interventions for PT/LBW children.

Participation in club sport in childhood is associated with mental health in preterm and term born adolescents

Preterm born individuals have an increased risk for mental health problems. Participation in club sport is associated with better mental health but the causal direction is unclear. It is not known whether this association could also be found in preterm children. Data from term born (N = 10,368), late preterm (N = 630), and very to moderately preterm born (N = 243) children from the Millennium Cohort Study at the ages of 3, 5, 7, 11, and 14 years were used. Longitudinal associations between the parent-reported Strengths and Difficulties questionnaire (SDQ) and club sport participation (days per week) were analysed using multigroup structural equation modelling, adjusting for gender, maternal depression, parental education; motor problems and attrition were controlled for. Multi-group structural equation modelling showed that children with more peer relationship problems, emotional symptoms, conduct problems or hyperactivity-inattention were less likely to participate in club sport at subsequent assessment time points. More days with club sport participation was associated with lower levels of emotional symptoms and peer relationship problems but not conduct problems or hyperactivity-inattention at subsequent ages. Results were similar in all gestational age groups. Club sport participation predicts lower levels of peer relationship and emotional problems in subsequent waves while it is also predicted by lower levels of emotional problems, peer relationship problems, conduct problems and hyperactivity-inattention in preceding waves. Since no differences in the relationship between SDQ subscales and club sport participation were seen with regard to gestational age groups, club sport should be encouraged in all children.

Within- and between-twin comparisons of risk for childhood behavioral difficulties after preterm birth

BACKGROUND

Preterm birth and multiple gestation are independently associated with adverse neurodevelopmental outcomes. The objective of this study was to describe risks of screening positive for attention-deficit/hyperactivity disorder (ADHD), autism spectrum disorder (ASD), and anxiety in preterm-born twin children by zygosity (monozygotic, dizygotic) and birth order (first-born, second-born).

METHODS

Caregivers of 349 preterm-born twin pairs (42% monozygotic) aged 3-18 years reported child behavioral outcomes on Strengths and Weaknesses of ADHD Symptoms and Normal Behavior; Social Responsiveness Scale, Second Edition; and Preschool Anxiety Scale or Screen for Child Anxiety and Related Emotional Disorders.

RESULTS

Concordance for behavioral outcomes in twin pairs ranged from 80.06 to 89.31% for ADHD, 61.01 to 84.23% for ASD, and 64.76 to 73.35% for anxiety. Monozygotic twins had a greater risk than dizygotic of screening positive for inattention (risk ratio = 2.91, 95% CI = 1.48-5.72) and social anxiety (1.79, 1.23-2.61). Relative to first-born, second-born twins had a greater risk of screening positive for hyperactivity/impulsivity (1.51, 1.06-2.16); overall ASD (2.38, 1.62-3.49); difficulties with social awareness (2.68, 1.94-3.71), social cognition (4.45, 3.06-6.46), and social communication (2.36, 1.56-3.57); restricted/repetitive behavior (1.91, 1.30-2.81); overall anxiety (1.34, 1.10-1.64); generalized anxiety (1.34, 1.11-1.60); and social anxiety (1.32, 1.06-1.64).

CONCLUSION

The current findings emphasize considering zygosity and birth order in preterm and multiple birth outcomes research, and highlight clinical implications for discharge planning, neurodevelopmental surveillance, and facilitating parenting and family support.

IMPACT

Zygosity and birth order are important determinants of behavioral and socioemotional outcomes in preterm-born twins. Among 349 preterm-born twin pairs aged 3-18 years (42% monozygotic), 61-89% demonstrated concordance for behavioral and socioemotional outcomes. Monozygosity had greater risks than dizygosity for positive screening of inattention and social anxiety. Second-born twins had greater risks than first-born for hyperactivity/impulsivity, social difficulties (awareness, cognition, communication), restricted/repetitive behavior, and anxiety (generalized, social). These findings have implications for discharge planning, neurodevelopmental surveillance, and facilitating parenting and family support.

The Relationship of Preterm and Small for Gestational Age with Child Cognition During School-Age Years

BACKGROUND

Children born preterm and/or small for gestational age (SGA) are at increased risk of poor cognitive outcomes, particularly in low and middle-income countries (LMICs).

OBJECTIVES

This study aimed to examine the cognitive and academic deficits during the school-age years in children born preterm or SGA compared with those in children born term adequate for gestational age (AGA) in rural Vietnam.

METHODS

Children born to women in a preconception micronutrient supplementation trial in Vietnam were classified into 3 groups: preterm AGA (n =138), term SGA (n =169), and term AGA (n = 1134). Cognitive abilities were assessed using the Wechsler Intelligence Scale for Children, measuring 4 domains [verbal comprehension index (VCI), perceptual reasoning index (PRI), working memory index (WMI), and processing speed index (PSI) scores] and full-scale intelligence quotient (FSIQ) at 6-7 and 10-11 y. Academic achievement was assessed with mathematic and language tests. Analysis of variance and multiple regression models were used to analyze differences in cognitive function and academic achievement at 6-7 and 10-11 y by birth phenotypes.

RESULTS

Compared with term AGA children, those born SGA had lower cognitive scores at both 6-7 y (VCI, -2.3; PRI, -3.7; PSI -2.1; and FSIQ, -2.9) and 10-11 y (VCI, -3.7; PRI, -3.5; WMI, -2.7; PSI, -1.9; and FSIQ, -3.9). Children born SGA also had poorer academic achievement with lower language (5.3) and mathematic (2.5) scores. Adjustments for maternal factors and home environment attenuated the associations, but the differences in VCI, PRI, FSIQ, and language at 10-11 y remained significant. There were no differences in cognitive function and academic achievement between children born preterm and AGA.

CONCLUSIONS

Our findings highlight the enduring association of birth phenotype on cognitive functioning and academic achievement during the school years, despite adjustments for maternal education and family environment. Further research is needed to implement effective interventions to improve birth outcomes and optimize child health and development in LMICs. The trial was registered at clinicaltrials.gov as NCT01665378 (URL: https://clinicaltrials.gov/ct2/show/NCT01665378).

Interdisciplinary fetal-neonatal neurology training improves brain health across the lifespan

Integrated fetal, neonatal, and pediatric training constitute an interdisciplinary fetal-neonatal neurology (FNN) program. A dynamic neural exposome concept strengthens curriculum content. Trainees participate in mentoring committee selection for guidance during a proposed two-year program. Prenatal to postnatal clinical learning re-enforces early toxic stressor interplay that influences gene-environment interactions. Maternal-placental-fetal triad, neonatal, or childhood diseases require diagnostic and therapeutic decisions during the first 1,000 days when 80 % of neural connections contribute to life-course phenotypic expression. Pediatric follow-up through 3 years adjusts to gestational ages of preterm survivors. Cumulative reproductive, pregnancy, pediatric and adult exposome effects require educational experiences that emphasize a principle-to-practice approach to a brain capital strategy across the lifespan. More rigorous training during fetal, neonatal, and pediatric rotations will be offered to full time trainees. Adult neurology residents, medical students, and trainees from diverse disciplines will learn essential topics during time-limited rotations. Curriculum content will require periodic re-assessments using educational science standards that maintain competence while promoting creative and collaborative problem-solving. Continued career-long learning by FNN graduates will strengthen shared healthcare decisions by all stakeholders. Recognition of adaptive or maladaptive neuroplasticity mechanisms requires analytic skills that identify phenotypes associated with disease pathways. Developmental origins and life-course concepts emphasize brain health across the developmental-aging continuum, applicable to interdisciplinary research collaborations. Social determinants of health recognize diversity, equity, and inclusion priorities with each neurological intervention, particularly for those challenged with disparities. Diagnostic and therapeutic strategies must address resource challenges particularly throughout the Global South to effectively lower the worldwide burden of neurologic disease. Sustainable development goals proposed by the World Health Organization offer universally applicable guidelines in response to ongoing global and regional polycrises. Gender, race, ethnicity, and socio-economic equality promote effective preventive, rescue and reparative neuroprotective interventions. Global synergistic efforts can be enhanced by establishing leadership within academic teaching hubs in FNN training to assist with structure and guidance for smaller healthcare facilities in each community that will improve practice, education and research objectives. Reduced mortality with an improved quality of life must prioritize maternal-pediatric health and well-being to sustain brain health across each lifespan with transgenerational benefits.

Burden of mental, behavioral, and neurodevelopmental disorders in the Finnish most preterm children: a national register study

Etiologies and the whole picture in childhood mental, behavioral, and neurodevelopmental disorders related to gestational age are unclear. This study included all Finnish children (N = 341,632) born between January 1, 2001, and December 31, 2006, whose data including their mothers (N = 241,284) were collected from national registers. Children with unclear gestational age (GA) (N = 1245), severe congenital malformations (N = 11,746), and moderate/severe/undefined cognitive impairment (N = 1140), and those who died during the perinatal period (N = 599) were excluded. The main outcome was the prevalence of mental and behavioral disorders (International Classification of Disorders) at 0 - 12 years of age in association with GA, adjusted for gender and prenatal variables. Out of all included (N = 326,902) children 16.6% (N = 54,270) were diagnosed to have any mental health disorder at 0 - 12 years. Adjusted Odd Ratio (OR) were for any disorder in preterm (< 37 weeks) 1.37 [1.28 - 1.46] and 4.03 [3.08 - 5.26] in extreme preterm (≤ 28 weeks) versus term born children, p < 0.05. The lower the GA at birth, the higher the risk for multiple disorders and earlier onset of disorder, p < 0.05. Adjusted ORs were for male/female 1.94 [1.90 - 1.99], maternal mental health disorder (yes/not) 1.99 [1.92 - 2.07], and smoking during pregnancy (yes/not) 1.58 [1.54 - 1.62], and these risks were more common in preterm versus term born children (p < 0.05). Extreme early birth was a strong risk factor per se for any or multiple and early shown mental health disorders. Other risk factors for mental health accumulated to preterm children.

The Stress Levels of Premature Infants' Parents and Related Factors in NICU

Introduction

Parental stress related to their infants' hospitalization is a significant concern that affects both parents and their infants. Fathers' experiences tend to be understudied compared to mothers. Further research on fathers' stress levels is necessary. While parental stress has been correlated with infant health severity, the specific causes and risk factors contributing to heightened stress levels in parents of neonatal intensive care unit (NICU) infants are not yet fully understood and require further investigation.

Objective

This study aimed to examine the stress levels experienced by parents of premature infants in the NICU and to explore the factors associated with parental stress in this specific context.

Methods

A cross-sectional observational design was used to accomplish this study, which was carried out on 743 parents from nine different NICUs located in governmental hospitals across various locations in Egypt. We used characteristics of parents and premature infants, and Parent Stress Scale was used for data collection.

Results

A majority of parents reported experiencing high stress in the following domains: sight and sound (80.3%), infants' appearance (69%), and the parent-infant relationship (81.4%). Additionally, about three-quarters (73.6%) of parents experienced high stress overall, with a mean score of 167.56 (21.3).

Conclusion

About three-quarters of the parents experienced high overall stress levels. Also, factors that were found to affect parents' stress levels included premature infants connected to mechanical ventilators, previous neonatal death, parents living far from hospitals, infants delivered through cesarean section, insufficient income, and prolonged hospitalization beyond 5 days.

Young adult outcomes following premature birth: A Western Australian experience

BACKGROUND

Childhood outcomes following preterm birth are widely published, however long-term adult outcomes are less well described. We aimed to determine the quality of life and burden of co-morbidities experienced by preterm-born young adults in Western Australia.

METHODS

A retrospective observational study was conducted. Participants born at 23-33 weeks gestation cared for at King Edward Memorial Hospital during 1990 and 1991 were recruited from a historical birth cohort. Participants completed general, medical and reproductive health questionnaires. Results were compared with contemporaneous cohort data and/or population statistics.

RESULTS

Questionnaires were received from 73 young adults aged 28 to 30 years. The majority of respondents completed high school (94.5 %), were employed fulltime (74.0 %) and had close friends and family relationships. Almost all the participants considered their health to be good (94.0 %) and participated in light exercise (90.0 %). Increased hypertension, hypercholesterolaemia, asthma, neuropsychiatric conditions and visual impairment were reported. Depression Anxiety and Stress Scale (DASS-21) scoring identified increased mild anxiety. Increased consultation with healthcare workers and use of prescription medications were reported.

CONCLUSION

The group of preterm-born adults surveyed reported a good quality of life, supportive interpersonal relationships and they provided significant contributions to society. They did report increased medical and psychological conditions than the general population.

Late effects of prematurity: Psychiatric outcomes of 17-year-olds born very preterm

AIM

Very preterm (VPT) birth is a known early vulnerability factor, impacting both physical and mental health over the life-span. The additional burden of psychiatric illness in VPT adolescents is likely to adversely affect critical developmental tasks and personal, social and academic/vocational trajectories. Our aim was to examine the magnitude and extent of the risk of psychological burden by determining the prevalence of psychiatric disorders in our prospectively followed-up VPT and full-term (FT) control cohorts, in this period of developmental transition at age 17 years.

METHODS

Rates of psychiatric disorder in the VPT and FT control cohorts were ascertained at clinical interview of the adolescents and their care giver(s) by an adolescent psychiatrist.

RESULTS

VPT birth was associated with a greater risk of generalised anxiety disorder (VPT vs. FT risk ratio (RR) 2.33; 95% confidence interval (CI): 1.16, 4.67, P = 0.02), as well as attentional problems (VPT vs. FT RR 3.46; 95% CI: 1.01, 11.88, P = 0.03). Although care givers of VPT adolescents reported many social and communication difficulties, and observation at clinical interview supported this, our data did not reach clinical threshold for group differences in autistic spectrum disorder. For all other psychiatric disorders, there was no difference between VPT and FT control adolescents.

CONCLUSION

Our longitudinal cohort follow-up study examining the late effects of VPT birth has demonstrated increased rates of clinically significant psychiatric disorder in this period of important developmental transition. Families and health professionals need to be aware of the increased risk so they can monitor for symptoms and seek effective mental health treatments and support.

Preterm birth and the risk of multimorbidity in adolescence: a multiregister-based cohort study

BACKGROUND

Multimorbidity affects people of all ages, but the risk factors of multimorbidity in adolescence are unclear. The aim of this study was to examine preterm birth (<37 weeks) as a shared risk factor for multiple health outcomes and the role of gestational age (degree of prematurity) in the development of increasingly complex multimorbidity (two, three, or four health outcomes) in adolescence (age 10-18 years).

METHODS

We used population-wide data from Finland (1 187 610 adolescents born 1987-2006) and Norway (555 431 adolescents born 1998-2007). Gestational age at birth was ascertained from medical birth registers and categorised as 23-27 weeks (extremely preterm), 28-31 weeks (very preterm), 32-33 weeks (moderately preterm), 34-36 weeks (late preterm), 37-38 weeks (early term), 39-41 weeks (term, reference category) and 42-44 weeks (post-term). Children who died or emigrated before their 10th birthday, and those with missing or implausible data on gestational age, birthweight, or covariates, were excluded. Health outcomes at age 10-18 years were ascertained from specialised health care and mortality registers. We calculated hazard ratios (HRs) and population attributable fractions (PAFs) with 95% CIs for multiple health outcomes during adolescence.

FINDINGS

Individuals were followed up from age 10 to 18 years (mean follow-up: 6 years, SD: 3 years). Preterm birth was associated with increased risks of 20 hospital-treated malignant, cardiovascular, endocrinological, neuropsychiatric, respiratory, genitourinary, and congenital health outcomes, after correcting for multiple testing and ignoring small effects (HR <1·2). Confounder-adjusted HRs comparing preterm with term-born adolescents were 2·29 (95% CI 2·19-2·39) for two health outcomes (PAF 9·0%; 8·3-9·6), and 4·22 (3·66-4·87) for four health outcomes (PAF 22·7%; 19·4-25·8) in the Finnish data. Results in the Norwegian data showed a similar pattern. We observed a consistent dose-response relationship between an earlier gestational age and elevated risks of increasingly complex multimorbidity in both datasets.

INTERPRETATION

Preterm birth is associated with increased risks of diverse multimorbidity patterns at age 10-18 years. Adolescents with a preterm-born background could benefit from diagnostic vigilance directed at multimorbidity and a multidisciplinary approach to health care.

FUNDING

European Union Horizon 2020, Academy of Finland, Foundation for Pediatric Research, Sigrid Jusélius Foundation, Signe and Ane Gyllenberg Foundation.

Mental health in young adults born extremely preterm or extremely low birthweight with contemporary neonatal intensive care

BACKGROUND

For infants born in the contemporary era of neonatal care, little is known about adult mental health outcomes of extremely preterm birth (EP; <28 weeks' gestation) or extremely low birthweight (ELBW; <1000 g). This study aimed to compare attention deficit hyperactivity disorder (ADHD), anxiety, mood, and substance use disorder prevalence in young adults born EP/ELBW and normal birthweight (NBW; >2499 g) controls, and to compare change in prevalence of mental health symptoms and disorders from 18 to 25 years.

METHODS

Participants were a prospective geographical cohort of 297 consecutive survivors born EP/ELBW during 1991-1992 and 260 NBW controls. At age 25 years, 174 EP/ELBW and 139 NBW participants completed the Adult ADHD Rating Scale, Structured Clinical Interview for DSM-IV Disorders, Beck Anxiety Inventory, and Center for Epidemiologic Studies Depression Scale-Revised. Data from follow-up at 18 years were also utilized. Multiple imputation was used to account for attrition.

RESULTS

Mental health outcomes at 25 years were similar between groups: prevalence rates were ADHD 7% v. 5%; anxiety 32% v. 27%; mood 38% v. 35%; substance use 12% v. 14% in the EP/ELBW and NBW groups, respectively. In both groups, ADHD declined between 18 and 25 years [odds ratio (OR) per year = 0.87, 95% confidence interval (CI) 0.79-0.95], and generalized anxiety disorder and major depressive episode became more common (OR 1.22, 95% CI 1.10-1.35 per year; OR 1.20, 95% CI 1.10-1.30 respectively).

CONCLUSIONS

This contemporary EP/ELBW cohort has comparable young adult mental health outcomes to controls, and similar patterns of change in mental health from late adolescence.

Small vulnerable newborns-big potential for impact

Despite major achievements in child survival, the burden of neonatal mortality has remained high and even increased in some countries since 1990. Currently, most neonatal deaths are attributable to being born preterm, small for gestational age (SGA), or with low birthweight (LBW). Besides neonatal mortality, these conditions are associated with stillbirth and multiple morbidities, with short-term and long-term adverse consequences for the newborn, their families, and society, resulting in a major loss of human capital. Prevention of preterm birth, SGA, and LBW is thus critical for global child health and broader societal development. Progress has, however, been slow, largely because of the global community's failure to agree on the definition and magnitude of newborn vulnerability and best ways to address it, to frame the problem attractively, and to build a broad coalition of actors and a suitable governance structure to implement a change. We propose a new definition and a conceptual framework, bringing preterm birth, SGA, and LBW together under a broader umbrella term of the small vulnerable newborn (SVN). Adoption of the framework and the unified definition can facilitate improved problem definition and improved programming for SVN prevention. Interventions aiming at SVN prevention would result in a healthier start for live-born infants, while also reducing the number of stillbirths, improving maternal health, and contributing to a positive economic and social development in the society.

Umbilical cord-derived mesenchymal stromal cell therapy to prevent the development of neurodevelopmental disorders related to low birth weight

Low birth weight (LBW) increases the risk of neurodevelopmental disorders (NDDs) such as attention-deficit/hyperactive disorder and autism spectrum disorder, as well as cerebral palsy, for which no prophylactic measure exists. Neuroinflammation in fetuses and neonates plays a major pathogenic role in NDDs. Meanwhile, umbilical cord-derived mesenchymal stromal cells (UC-MSCs) exhibit immunomodulatory properties. Therefore, we hypothesized that systemic administration of UC-MSCs in the early postnatal period may attenuate neuroinflammation and thereby prevent the emergence of NDDs. The LBW pups born to dams subjected to mild intrauterine hypoperfusion exhibited a significantly lesser decrease in the monosynaptic response with increased frequency of stimulation to the spinal cord preparation from postnatal day 4 (P4) to P6, suggesting hyperexcitability, which was improved by intravenous administration of human UC-MSCs (1 × 10⁵ cells) on P1. Three-chamber sociability tests at adolescence revealed that only LBW males exhibited disturbed sociability, which tended to be ameliorated by UC-MSC treatment. Other parameters, including those determined via open-field tests, were not significantly improved by UC-MSC treatment. Serum or cerebrospinal fluid levels of pro-inflammatory cytokines were not elevated in the LBW pups, and UC-MSC treatment did not decrease these levels. In conclusion, although UC-MSC treatment prevents hyperexcitability in LBW pups, beneficial effects for NDDs are marginal.

The Role of Family Function and Triadic Interaction on Preterm Child Development-A Systematic Review

Preterm infants are at high risk of developmental disability/delay and are more dependent on their caregiving environment for regulation due to their neurological immaturity. A premature birth is also a major stressor to the family system that constitutes the infant's caregiving environment. The following systematic review investigates whether families with preterm children differ from families with full-term children in their interactions, and what impact the quality of family interaction has on child development. Using the Cochrane model, we conducted a systematic review of quantitative studies published in psycINFO, socINDEX, and PubMed, concerning family quality in triadic interactions in families with premature infants and children, and at least one child development outcome variable. The quality of these studies was assessed using the Newcastle-Ottawa scale assessment form for cohort studies (NOS). Eleven studies were included in the review. Quality of family interactions is either equal to or poorer in families with preterm children, compared with families with full-term children. Importantly, the link between quality of family interactions and child development outcome is stronger in preterm children compared with full-term children, regarding both positive and negative influence. Our results highlight the importance of strengthening family interactions in order to promote development in preterm children. Notably, this review provides the first systematic overview of family function and the quality of triadic interactions in preterm families. The limited number of studies with a family-system focus makes it difficult for us to draw any definitive conclusions, while underscoring the need for more observational studies, particularly post-infancy, to be able to identify specific aspects of family interactions that may be critical for preterm child development.

Long-term follow-up of self-reported mental health and health-related quality of life in adults born extremely preterm

BACKGROUND

Survival of extremely preterm (EP) birth is increasing, but long-term consequences are still largely unknown as their high survival rates are recent achievements.

AIMS

To examine self-reported mental health, and health related quality of life (HRQoL) in a cohort of adults born EP in the early 1990s and individually matched term-born controls, and to describe development through the transition from teenager to adults.

METHODS

Thirty-five eligible subjects were born at gestational age ≤ 28 weeks or with birth weight ≤ 1000 g during 1991-1992 in this population-based cohort from Western Norway. We assessed mental health using Youth Self-Report (YSR) at 18 years of age, and Adult Self-Report (ASR) at 27 years, and HRQoL by RAND-36 at 27 years. Data were analysed by unadjusted and adjusted mixed effects models with time by group as interaction term.

RESULTS

At 27 years, 24 (69 %) EP-born and 26 (74 %) term-born controls participated. Scores for internalising problems, and syndrome scale anxious/depressed and withdrawn were higher among EP-born compared to term-born controls. For HRQoL, scores were similar in EP-born and term-born groups, except the domain physical functioning where EP-born scored lower. Development over time from 18 to 27 years showed increasing (i.e. deteriorating) scores for internalising, anxious/depressed, somatic complaints, and attention problems in the EP born group. For the term-born, scores for anxious/depression increased over time.

CONCLUSIONS

At 27 years of age, EP-born adults reported more internalising problems than term-born controls, while HRQoL was relatively similar except physical functioning. Mental health problems in the EP-born increased from adolescence to adulthood.

The extremely preterm young adult - State of the art

Recently several studies have reported adult outcomes for individuals born at extremely low gestations, although they tend to be included as part of slightly more mature populations. The growth in collaborative studies allows greater confidence in the identification of persisting risk and allows us to have confidence in the likely outcomes in more contemporary cohorts. This review shows the persistence of adverse outcomes through to adult life and includes a range of outcomes including all body systems evaluated. Nonetheless adult outcomes demonstrate that most survivors appear to be free of major disabling conditions and demonstrate good participation in society. Several studies have reported outcomes in the third decade, but subsequent ageing trajectories have not yet been defined. The stability of many of the outcomes evaluated over childhood into adult life and the lack of improvement in prevalence of childhood impairments found in contemporary cohorts indicates persisting levels of risk.

Preterm birth and the risk of chronic disease multimorbidity in adolescence and early adulthood: A population-based cohort study

BACKGROUND

People who were born prematurely have high risks of many individual diseases and conditions in the early part of the life course. However, our knowledge of the burden of multiple diseases (multimorbidity) among prematurely born individuals is limited. We aimed to investigate the risk and patterns of chronic disease multimorbidity in adolescence and early adulthood among individuals born across the spectrum of gestational ages, comparing preterm and full-term born individuals.

METHODS AND FINDINGS

We used individual-level data from linked nationwide registers to examine the associations of gestational age at birth with specialised healthcare records of ≥2 chronic diseases (multimorbidity) in adolescence (age 10-17 years) and early adulthood (age 18-30 years). Our study population comprised 951,116 individuals (50.2% females) born alive in Finland between 1st January 1987 and 31st December 2006, inclusive. All individuals were followed from age 10 years to the onset of multimorbidity, emigration, death, or 31 December 2016 (up to age 30 years). We estimated hazard ratios (HRs) and 95% confidence intervals (CIs) for multimorbidity using flexible parametric survival models. During 6,417,903 person-years at risk (median follow-up: 7.9 years), 11,919 individuals (1.3%) had multimorbidity in adolescence (18.6 per 10,000 person-years). During 3,967,419 person-years at risk (median follow-up: 6.2 years), 15,664 individuals (1.7%) had multimorbidity in early adulthood (39.5 per 10,000 person-years). Adjusted HRs for adolescent multimorbidity, comparing preterm to full-term born individuals, were 1.29 (95% CI: 1.22 to 1.36) and 1.26 (95% CI: 1.18 to 1.35) in females and males, respectively. The associations of preterm birth with early adult multimorbidity were less marked, with the adjusted HRs indicating 1.18-fold risk in females (95% CI: 1.12 to 1.24) and 1.10-fold risk in males (95% CI: 1.04 to 1.17). We observed a consistent dose-response relationship between earlier gestational age at birth and increasing risks of both multimorbidity outcomes. Compared to full-term born males, those born at 37-38 weeks (early term) had a 1.06-fold risk of multimorbidity in adolescence (95% CI: 0.98 to 1.14) and this risk increased in a graded manner up to 6.85-fold (95% CI: 5.39 to 8.71) in those born at 23-27 weeks (extremely premature), independently of covariates. Among females, the same risks ranged from 1.16-fold (95% CI: 1.09 to 1.23) among those born at 37-38 weeks to 5.65-fold (95% CI: 4.45 to 7.18) among those born at 23-27 weeks. The corresponding risks of early adult multimorbidity were similar in direction but less marked in magnitude, with little difference in risks between males and females born at 36-37 weeks but up to 3-fold risks observed among those born at 23-27 weeks.

CONCLUSIONS

Our findings indicate that an earlier gestational age at birth is associated with increased risks of chronic disease multimorbidity in the early part of the life course. There are currently no clinical guidelines for follow-up of prematurely born individuals beyond childhood, but these observations suggest that information on gestational age would be a useful characteristic to include in a medical history when assessing the risk of multiple chronic diseases in adolescent and young adult patients.

Outcomes into adulthood of infants born extremely preterm

As survival of infants born extremely preterm increases, more are now reaching adulthood. It is well documented that survivors born extremely preterm experience more developmental delay and disability in multiple domains compared with term-born controls in early childhood and school age. However, with increasing age, health problems involving physical and mental health become more evident. Despite these challenges, it is reassuring that self-reported quality of life remains good. Future directions of research include development of age-appropriate interventions to optimise health and development of individuals born extremely preterm beyond school age.

Psychiatric disorders in individuals born very preterm / very low-birth weight: An individual participant data (IPD) meta-analysis

BACKGROUND

Data on psychiatric disorders in survivors born very preterm (VP; <32 weeks) or very low birthweight (VLBW; <1500 g) are sparse. We compared rates of psychiatric diagnoses between VP/VLBW and term-born, normal birthweight (term/NBW) control participants.

METHODS

This individual participant data (IPD) meta-analysis pooled data from eligible groups in the Adults born Preterm International Collaboration (APIC). Inclusion criteria included: 1) VP/VLBW group (birth weight <1500 g and/or gestational age <32 weeks), 2) normal birth weight/term-born control group (birth weight >2499 g and/or gestational age ≥37 weeks), and 3) structured measure of psychiatric diagnoses using DSM or ICD criteria. Diagnoses of interest were Attention Deficit Hyperactivity Disorder (ADHD), Autism Spectrum Disorder (ASD), Anxiety Disorder, Mood Disorder, Disruptive Behaviour Disorder (DBD), Eating Disorder, and Psychotic Disorder. A systematic search for eligible studies was conducted (PROSPERO Registration Number 47555).

FINDINGS

Data were obtained from 10 studies (1385 VP/VLBW participants, 1780 controls), using a range of instruments and approaches to assigning diagnoses. Those born VP/VLBW had ten times higher odds of meeting criteria for ASD (odds ratio [OR] 10·6, 95% confidence interval [CI] 2·50, 44·7), five times higher odds of meeting criteria for ADHD (OR 5·42, 95% CI 3·10, 9·46), twice the odds of meeting criteria for Anxiety Disorder (OR 1·91, 95% CI 1·36, 2·69), and 1·5 times the odds of meeting criteria for Mood Disorder (OR 1·51, 95% CI 1·08, 2·12) than controls. This pattern of findings was consistent within age (<18 years vs. ≥18 years) and sex subgroups.

INTERPRETATION

Our data suggests that individuals born VP/VLBW might have higher odds of meeting criteria for certain psychiatric disorders through childhood and into adulthood than term/NBW controls. Further research is needed to corroborate our results and identify factors associated with psychiatric disorders in individuals born VP/VLBW.

FUNDING

Australia's National Health & Medical Research Council; CAPES (Coordenação de Aperfeiçoamento de Pessoal deNível Superior) - International Cooperation General Program; Canadian Institutes of Health Research Team Grant; National Council for Scientific and Technological Development (CNPq); Academy of Finland; Sigrid Juselius Foundation; Signe and Ane Gyllenberg Foundation; European Union's Horizon 2020 research and innovation programme: Project RECAP-Preterm; European Commission Dynamics of Inequality Across the Life-course: structures and processes (DIAL); Neurologic Foundation of New Zealand; MRC programme grant; Health Research Council of New Zealand; National Institutes of Health, USA; The Research Council of Norway; Joint Research Committee between St. Olavs Hospital and Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology (NTNU); Liaison Committee between Central Norway Regional Health Authority and NTNU.

Optimism in adults born preterm: Systematic review and individual-participant-data meta-analysis

AIM

Preterm birth(<37 gestational weeks) is associated with numerous adversities, however, data on positive developmental outcomes remain limited. We examined if preterm and term born(≥37 gestational weeks) adults differ in dispositional optimism/pessimism, a personality trait associated with health and wellbeing. We assessed if birth weight z-score, neurosensory impairments and parental education modified the outcome.

METHODS

We systematically searched PubMed and Web of Science for cohort or case-control studies(born ≥ 1970) with data on gestational age and optimism/pessimism reported using the Life-Orientation-Test-Revised in adulthood(≥18 years). The three identified studies(Helsinki Study of Very Low Birth Weight Adults; Arvo Ylppö Longitudinal Study; Avon Longitudinal Study of Parents and Children) provided data for the two-step random-effects linear regression Individual-Participant-Data meta-analysis.

RESULTS

Preterm and term borns did not differ on optimism(p = 0.76). Preterms scored higher on pessimism than term borns(Mean difference = 0.35, 95%Confidence Interval 0.36, 0.60, p = 0.007), although not after full adjustment. Preterm born participants, but not term born participants, with higher birth weight z-score, had higher optimism scores (0.30 raw score units per standard deviation increase, 95% CI 0.10, 0.49, p = 0.003); preterm vs term x birth weight z-score interaction p = 0.004).

CONCLUSIONS

Preterm and term born adults display similar optimism. In preterms, higher birth weight may foster developmental trajectories promoting more optimistic life orientations.

A systematic review of brain MRI findings in monogenic disorders strongly associated with autism spectrum disorder

BACKGROUND

Research on monogenic forms of autism spectrum disorder (autism) can inform our understanding of genetic contributions to the autism phenotype; yet, there is much to be learned about the pathways from gene to brain structure to behavior. This systematic review summarizes and evaluates research on brain magnetic resonance imaging (MRI) findings in monogenic conditions that have strong association with autism. This will improve understanding of the impact of genetic variability on brain structure and related behavioral traits in autism.

METHODS

The search strategy for this systematic review followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. Risk of bias (ROB) assessment was completed on included studies using the Newcastle-Ottawa Scales.

RESULTS

Of 4,287 studies screened, 69 were included pertaining to 13 of the top 20 genes with the strongest association with autism. The greatest number of studies related to individuals with PTEN variants and autism. Brain MRI abnormalities were reported for 12 of the 13 genes studied, and in 51.7% of participants across all 13 genes, including 100% of participants with ARID1B variants. Specific MRI findings were highly variable, with no clear patterns emerging within or between the 13 genes, although white matter abnormalities were the most common. Few studies reported specific details about methods for acquisition and processing of brain MRI, and descriptors for brain abnormalities were variable. ROB assessment indicated high ROB for all studies, largely due to small sample sizes and lack of comparison groups.

CONCLUSIONS

Brain abnormalities are common in this population of individuals, in particular, children; however, a range of different brain abnormalities were reported within and between genes. Directions for future neuroimaging research in monogenic autism are suggested.

The structural connectome and internalizing and externalizing symptoms at 7 and 13 years in individuals born very preterm and full-term

BACKGROUND

Children born very preterm (VP) are at higher risk of emotional and behavioral problems compared with full-term (FT) children. We investigated the neurobiological basis of internalizing and externalizing symptoms in individuals born VP and FT by applying a graph theory approach.

METHODS

Structural and diffusion MRI data were combined to generate structural connectomes and calculate measures of network integration and segregation at 7 (VP:72; FT:17) and 13 years (VP:125; FT:44). Internalizing and externalizing were assessed at 7 and 13 years using the Strengths and Difficulties Questionnaire. Linear regression models were used to relate network measures and internalizing and externalizing symptoms concurrently at 7 and 13 years.

RESULTS

Lower network integration (characteristic path length and global efficiency) was associated with higher internalizing symptoms in VP and FT children at 7 years, but not at 13 years. The association between network integration (characteristic path length) and externalizing symptoms at 7 years was weaker, but there was some evidence for differential associations between groups, with lower integration in the VP and higher integration in the FT group associated with higher externalizing symptoms. At 13 years, there was some evidence that associations between network segregation (average clustering coefficient, transitivity, local efficiency) and externalizing differed between the VP and FT groups, with stronger positive associations in the VP group.

CONCLUSIONS

This study provides insights into the neurobiological basis of emotional and behavioral problems following preterm birth, highlighting the role of the structural connectome in internalizing and externalizing symptoms in childhood and adolescence.

Long-Term Neurodevelopmental Outcomes after Moderate and Late Preterm Birth: A Systematic Review

OBJECTIVE

To systematically review and perform meta-analyses on the long-term neurodevelopmental outcomes of adults born moderate and late preterm (MLPT) in relation to cognitive functioning and psychiatric disorders.

STUDY DESIGN

A search was conducted to identify any studies that involved prematurity in adulthood. From these studies, reports that included a group of MLPT adults and included description of cognitive and/or mental health domains (including specific long-term outcomes) were selected.

RESULTS

In total, 155 publications were identified, but only 16 papers met the inclusion criteria. A small effect size (g = 0.38) was found in MLPT to demonstrate poorer intellectual performance compared with those born at term. Moreover, MLPT adults exhibited greater odds for any psychiatric (OR 1.14), substance use (OR 1.16), mood (OR 1.06), and psychotic disorders (OR 1.40).

CONCLUSIONS

Despite inconsistency due to the methodologic differences between the selected studies, MLPT showed minor long-term effects into adulthood. However, more studies are needed, because prematurity seems to confer some vulnerability to biological and environmental factors that enhance susceptibility to adverse neurodevelopment outcomes.

National and subnational trends of birthweight in Peru: Pooled analysis of 2,927,761 births between 2012 and 2019 from the national birth registry

Background

National and subnational characterization of birthweight profiles lacks in low- and middle-income countries, yet these are needed for monitoring the progress of national and global nutritional targets. We aimed to describe birthweight indicators at the national and subnational levels in Peru (2012-2019), and by selected correlates.

Methods

We studied mean birthweight (g), low birthweight (<2,500 g) and small for gestational age (according to international growth curves) prevalences. We analysed the national birth registry and summarized the three birthweight indicators at the national, regional, and province level, also by geographic area (Coast, Highlands, and Amazon). With individual-level data from the mother, we described the birthweight indicators by age, educational level and healthcare provider. Following an ecological approach (province level), we described the birthweight indicators by human development index (HDI), altitude above sea level, proportion of the population living in poverty and proportion of rural population.

Findings

Mean birthweight was always the lowest in the Highlands (2,954 g in 2019) yet the highest in the Coast (3,516 g in 2019). The same was observed for low birthweight and small for gestational age. In regions with Coast and Highlands, the birthweight indicators worsen from the Coast to the Highlands; the largest absolute difference in mean birthweight between Coast and Highlands in the same region was 367 g. All birthweight indicators were the worst in mothers with none/initial education, while they improved with higher HDI.

Interpretation

This analysis suggests that interventions are needed at the province level, given the large differences observed between Coast and Highlands even in the same region.

Funding

Wellcome Trust (214185/Z/18/Z).

Preterm birth, low fetal growth and risk of suicide in adulthood: a national cohort and co-sibling study

BACKGROUND

Adverse perinatal exposures have been associated with psychiatric disorders and suicidal behaviours later in life. However, the independent associations of gestational age at birth or fetal growth with suicide death, potential sex-specific differences, and causality of these associations are unclear.

METHODS

A national cohort study was conducted of all 2 440 518 singletons born in Sweden during 1973-98 who survived to age 18 years, who were followed up through 2016. Cox regression was used to compute hazard ratios (HRs) for suicide death associated with gestational age at birth or fetal growth while mutually adjusting for these factors, sociodemographic characteristics and family history of suicide. Co-sibling analyses assessed the influence of unmeasured shared familial (genetic and/or environmental) factors.

RESULTS

In 31.2 million person-years of follow-up, 4470 (0.2%) deaths by suicide were identified. Early preterm birth (22-33 weeks) was associated with an increased risk of suicide among females [adjusted hazard ratio (HR), 1.97; 95% confidence interval CI), 1.29, 3.01; P = 0.002) but not males (0.90; 0.64, 1.28; P = 0.56), compared with full-term birth (39-41 weeks). Small for gestational age was associated with a modestly increased risk of suicide among females (adjusted HR, 1.27; 95% CI, 1.08, 1.51; P = 0.005) and males (1.14; 1.03, 1.27; P = 0.02). However, these associations were attenuated and non-significant after controlling for shared familial factors.

CONCLUSIONS

In this large national cohort, preterm birth in females and low fetal growth in males and females were associated with increased risks of suicide death in adulthood. However, these associations appeared to be non-causal and related to shared genetic or prenatal environmental factors within families.

"The First Thousand Days" Define a Fetal/Neonatal Neurology Program

Gene-environment interactions begin at conception to influence maternal/placental/fetal triads, neonates, and children with short- and long-term effects on brain development. Life-long developmental neuroplasticity more likely results during critical/sensitive periods of brain maturation over these first 1,000 days. A fetal/neonatal program (FNNP) applying this perspective better identifies trimester-specific mechanisms affecting the maternal/placental/fetal (MPF) triad, expressed as brain malformations and destructive lesions. Maladaptive MPF triad interactions impair progenitor neuronal/glial populations within transient embryonic/fetal brain structures by processes such as maternal immune activation. Destructive fetal brain lesions later in pregnancy result from ischemic placental syndromes associated with the great obstetrical syndromes. Trimester-specific MPF triad diseases may negatively impact labor and delivery outcomes. Neonatal neurocritical care addresses the symptomatic minority who express the great neonatal neurological syndromes: encephalopathy, seizures, stroke, and encephalopathy of prematurity. The asymptomatic majority present with neurologic disorders before 2 years of age without prior detection. The developmental principle of ontogenetic adaptation helps guide the diagnostic process during the first 1,000 days to identify more phenotypes using systems-biology analyses. This strategy will foster innovative interdisciplinary diagnostic/therapeutic pathways, educational curricula, and research agenda among multiple FNNP. Effective early-life diagnostic/therapeutic programs will help reduce neurologic disease burden across the lifespan and successive generations.

An overview of adult health outcomes after preterm birth

Preterm birth (gestational age < 37 completed weeks) has increased in prevalence in most countries in the past 20 years and now affects nearly 11% of all births worldwide. Because of treatment advances introduced in the 1970s-1980s, >95% of preterm infants who receive modern neonatal and pediatric care now survive into adulthood. The earliest birth cohorts to benefit from those advances are now in their 4th and 5th decades of life. A growing number of large cohort studies have investigated the long-term health sequelae in adulthood. Evidence has consistently shown that adult survivors of preterm birth have increased risks of chronic disorders involving various organ systems, including cardiovascular, endocrine/metabolic, respiratory, renal, neurodevelopmental, and psychiatric disorders, which either persist from childhood into adulthood or sometimes first manifest in adulthood. These disorders also lead to moderately (30% to 50%) increased mortality risks during early to mid-adulthood among persons born preterm compared with full-term, and even higher risks among those born at the earliest gestational ages. However, the majority of persons born preterm have low absolute risks of these outcomes and good self-reported quality of life in adulthood. Priorities for future research include the assessment of long-term health sequelae of preterm birth in racially and economically diverse populations, additional follow-up of existing cohorts into older adulthood, elucidation of outcomes by preterm birth subtype (e.g., different underlying causes) to improve risk stratification, and identification of protective factors that will support the long-term health trajectory and well-being of preterm-born adults.