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Very preterm (<32 weeks gestation; VP) and/or very low birth weight (<1500g; VLBW) children often have cognitive and mathematic difficulties. It is unknown whether VP/VLBW children's frequent mathematic problems significantly add to the burden of negative life-course consequences over and above effects of more general cognitive deficits. Our aim was to determine whether negative consequences of VP/VLBW versus healthy term birth on adult wealth are mediated by mathematic abilities in childhood, or rather explained by more general cognitive abilities. 193 VP/VLBW and 217 healthy term comparison participants were studied prospectively from birth to adulthood as part of a geographically defined study in Bavaria (South Germany). Mathematic and general cognitive abilities were assessed at 8 years with standardized tests; wealth information was assessed at 26 years with a structured interview and summarized into a comprehensive index score. All scores were z-standardized. At 8 years, VP/VLBW (n = 193, 52.3% male) had lower mathematic and general cognitive abilities than healthy term comparison children (n = 217, 47.0% male). At 26 years, VP/VLBW had accumulated significantly lower overall wealth than term born comparison adults (-0.57 (1.08) versus -0.01 (1.00), mean difference 0.56 [0.36-0.77], p < .001). Structural equation modeling confirmed that VP/VLBW birth (β = -.13, p = .022) and childhood IQ (β = .24, p < .001) both directly predicted adult wealth, but math did not (β = .05, p = .413). Analyses were controlled for small-for-gestational-age (SGA) birth, child sex, and family socioeconomic status. This longitudinal study from birth to adulthood shows that VP/VLBW survivors' general cognitive rather than specific mathematic problems explain their diminished life-course success. These findings are important in order to design effective interventions at school age that reduce the burden of prematurity for those individuals who were born at highest neonatal risk.

Cognitive deficits have been inconsistently described for late or moderately preterm children but are consistently found in very preterm children. This study investigates the association between cognitive workload demands of tasks and cognitive performance in relation to gestational age at birth. Data were collected as part of a prospective geographically defined whole-population study of neonatal at-risk children in Southern Bavaria. At 8;5 years, n = 1326 children (gestation range: 23-41 weeks) were assessed with the K-ABC and a Mathematics Test. Cognitive scores of preterm children decreased as cognitive workload demands of tasks increased. The relationship between gestation and task workload was curvilinear and more pronounced the higher the cognitive workload: GA² (quadratic term) on low cognitive workload: R²  = .02, p<0.001; moderate cognitive workload: R²  = .09, p<0.001; and high cognitive workload tasks: R²  = .14, p<0.001. Specifically, disproportionally lower scores were found for very (<32 weeks gestation) and moderately (32-33 weeks gestation) preterm children the higher the cognitive workload of the tasks. Early biological factors such as gestation and neonatal complications explained more of the variance in high (12.5%) compared with moderate (8.1%) and low cognitive workload tasks (1.7%). The cognitive workload model may help to explain variations of findings on the relationship of gestational age with cognitive performance in the literature. The findings have implications for routine cognitive follow-up, educational intervention, and basic research into neuro-plasticity and brain reorganization after preterm birth.

The current study tested whether the reported lower wellbeing of parents after preterm birth, relative to term birth, is a continuation of a pre-existing difference before pregnancy. Parents from Germany (the German Socio-Economic Panel Study, N = 10,649) and the United Kingdom (British Household Panel Study and Understanding Society, N = 11,012) reported their new-born’s birthweight and gestational age, subsequently categorised as very preterm or very low birthweight (VP/VLBW, < 32 weeks or < 1500 g), moderately/late preterm or low birthweight (MLP/LBW, ≥ 32 weeks and < 37 weeks/≥ 1500 g and < 2500 g), or term-born (≥ 37 weeks and ≥ 2500 g). Mixed models were used to analyse life satisfaction, an aspect of wellbeing, at four assessments-two years and six months before birth and six months and two years afterwards. Two years before birth, satisfaction of prospective term-born, MLP/LBW, or VP/VLBW mothers did not significantly differ. However, mothers of VP/VLBWs had lower satisfaction relative to mothers of term-borns at both assessments post-birth. Among fathers, satisfaction levels were similarly equivalent two years before birth. Subsequently, fathers of VP/VLBWs temporarily differed in satisfaction six months post-birth relative to fathers of term-borns. Results indicate that parents’ lower life satisfaction after VP/VLBW birth is not a continuation of pre-existing life satisfaction differences.

Background Multiple or persistent crying, sleeping, or feeding problems in early childhood (regulatory problems) are associated with increased internalizing symptoms in adulthood. Unknown is whether early regulatory problems are associated with emotional disorders in adulthood, and what psychosocial factors may provide protection. We tested whether early childhood multiple or persistent regulatory problems are associated with a higher risk of (a) any mood and anxiety disorder in adulthood; (b) perceiving no social support in adulthood; and (c) whether social support provides protection from mood and anxiety disorders among participants who had multiple/persistent regulatory problems and those who never had regulatory problems. Methods Data from two prospective longitudinal studies in Germany ( n  = 297) and Finland ( n  = 342) was included ( N  = 639). Regulatory problems were assessed at 5, 20, and 56 months with the same standardized parental interviews and neurological examinations. In adulthood (24–30 years), emotional disorders were assessed with diagnostic interviews and social support with questionnaires. Results Children with multiple/persistent regulatory problems ( n  = 132) had a higher risk of any mood disorder (odds ratio (OR) = 1.81 [95% confidence interval = 1.01–3.23]) and of not having any social support from peers and friends (OR = 1.67 [1.07–2.58]) in adulthood than children who never had regulatory problems. Social support from peers and friends provided protection from mood disorders, but only among adults who never had regulatory problems (OR = 4.03 [2.16–7.94]; p  = .039 for regulatory problems x social support interaction). Conclusions Children with multiple/persistent regulatory problems are at increased risk of mood disorders in young adulthood. Social support from peers and friends may, however, only provide protection from mood disorders in individuals who never had regulatory problems.

Objectives Retrospective harmonisation of data obtained through different instruments creates measurement error, even if the underlying concepts are assumed the same. We tested a novel method for item‐level data harmonisation of two widely used instruments that measure emotional and behavioural problems: the Child Behavior Checklist (CBCL) and the Strengths and Difficulties Questionnaire (SDQ). Methods Item content of the CBCL and SDQ was mapped onto four dimensions: emotional problems, peer relationship problems, hyperactivity/inattention and conduct problems. A diverse test sample was drawn from four prospective longitudinal birth cohort studies in Australia and Europe who used one or both instruments. The pooled sample included 5188 data points assessing children and adolescents aged 6–13 years (N = 257–704 participants per cohort). Measurement invariance was assessed using latent variable multi‐group confirmatory factor analysis. Results Fifteen items from the CBCL and SDQ were mapped onto four dimensions allowing for measurement invariance testing as part of a stepwise process. Partial strict invariance between CBCL and SDQ assessments was established for all four dimensions. Conclusions The harmonised dimensions of emotional, peer relationship, hyperactivity/inattention and conduct problems are invariant across the CBCL and SDQ suggesting that these dimensions can be reliably compared with limited measurement error.

Background Preterm birth is a risk factor for the development of emotional and behavioural problems in childhood and adolescence. Given the substantial improvements in neonatal care across decades, it has been expected that the difference in emotional problems, hyperactivity, and conduct problems between moderate to late preterm (MLPT) and full term (FT) children and adolescents have declined in recent years. Methods Data from four UK population‐based studies were used: The National Child Development Study (NCDS; 1958), the British Cohort Study (BCS70; 1970), the Avon Longitudinal Study of Parents and Children (ALSPAC, 1991–1992) and the Millennium Cohort Study (MCS; 2000–2002). Emotional problems, hyperactivity and conduct problems were assessed with mother‐reports in early childhood (5–7 years), late childhood (10–11 years) and adolescence (14–16 years). Furthermore, emotional problems were self‐reported in adolescence in BCS70, ALSPAC and MCS. Results In the most recent cohort, the MLPT group had higher mother‐reported emotional problems than those born FT in late childhood and adolescence, whereas there were no differences in self‐reported emotional problems in adolescence. Regarding mother‐reported hyperactivity symptoms, the MLPT group had higher scores than the FT group in the two most recent cohorts in late childhood and in the most recent cohort in adolescence. Regarding mother‐reported conduct problems, MLPT children had significantly higher scores than the FT children in the oldest and in the most recent cohort in late childhood. On the other hand, in adolescence, MLPT children had significantly lower scores in conduct problems in comparison to FT children in the cohort born in 1991–1992. Conclusions Mother‐reported emotional problems and hyperactivity symptoms of those born MLPT have increased from the birth years 1958 to 2000–2002 during late childhood and adolescence, whereas self‐reported emotional problems were similar in MLPT and FT groups during adolescence from 1970 to 2000–2002. Findings are less consistent regarding conduct problems. The current findings highlight the importance of raising the awareness of teachers about the association between MLPT birth and behavioural and emotional problems in late childhood and adolescence to prevent the long‐term negative outcomes associated with the sequalae of MLPT birth.

The association between childhood bullying victimisation and mental health problems in adulthood has been consistently reported in the literature. Previous studies used both retrospective and prospective reports to measure bullying victimisation. However, there could be biases in both reports. We aimed to assess agreement between prospective and retrospective reports of childhood bullying victimisation, to compare their associations with mental health in early adulthood, and to examine the associations of consistent prospectively and retrospectively reported bullying victimisation with adult mental health. Data were from the prospective Bavarian Longitudinal Study of neonatal at-risk children and term-born controls recruited at birth. 489 participants were followed from birth to age 26 (mean [SD]: 26.4 [0.8] years). Adult mental health was assessed using both the Achenbach Young Adult Self-Report (YSR) and standardised diagnostic interviews. Childhood bullying victimisation was prospectively reported by participants and parents at age 13 and retrospectively self-reported at age 26. We showed that the agreement between retrospective and prospective self-reports of bullying victimisation was fair (Kappa 0.30) with only slight agreement (Kappa 0.18) when compared with prospective parent-reports. Both prospectively and retrospectively self-reported bullying victimisation was associated with poor mental health. Retrospective reports tended to produce stronger associations. Participants who reported being bullied both retrospectively and prospectively had a particularly elevated risk for mental health problems. In conclusion, prospective and retrospective reports capture partly different individuals with exposure to bullying victimisation. Exposure to bullying victimisation, whether it was retrospectively or prospectively self-reported, was associated with an increased risk for mental health problems.

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.

ObjectivesTo examine very preterm (gestational age at birth <32 weeks) and/or very low birth weight (birth weight <1500 g: VP/VLBW) adults’ personality and risk taking when compared with term controls. To investigate whether differences between VP/VLBW adults and controls remain after taking their general cognitive abilities into account.DesignThe Bavarian Longitudinal Study is a geographically defined prospective cohort study of neonatal at-risk children born in 1985/1986 in Germany. A total of 200 VP/VLBW and 197 controls completed main outcome measures including broad autism phenotype, personality traits (eg, introversion, neuroticism), and risk taking at 26 years of age.ResultsWhen compared with term controls, VP/VLBW adults scored significantly higher in autistic features, introversion and neuroticism but not in conscientiousness and closeness scales. They also reported lower risk taking. Profile analysis showed higher introversion, autistic features and neuroticism and lower risk taking as unique features of VP/VLBW adults (Fwithin-group=0.81, ns; Fbetween-group=49.56, p<0.001). These characteristics were found to load onto a single profile factor which was equivalent between the VP/VLBW and control samples (χ2=12.49, df=7, ns; comparative fit index=0.98). VP/VLBW birth significantly predicted the profile factor (β=0.33, p<0.001) and explained 11% of its variance. Adjusting for general cognitive deficits did not alter the findings.ConclusionsVP/VLBW birth poses an important risk for a global withdrawn personality, as indicated by being less socially engaged (introversion), low in taking risks, poor in communication (autistic features) and easily worried (neuroticism). This profile might help to explain the social difficulties VP/VLBW individuals experience in adult roles, such as in peer/partner relationships and career.

The aim of the current study was to examine whether self-control skills in childhood moderate the association between very preterm birth (<32 weeks of gestational age) and emotional problems and peer victimization in adolescence. We used data from four prospective cohort studies, which included 29,378 participants in total ( N = 645 very preterm; N = 28,733 full-term). Self-control was mother-reported in childhood at 5–11 years whereas emotional problems and peer victimization were both self- and mother-reported at 12–17 years of age. Findings of individual participant data meta-analysis showed that self-control skills in childhood do not moderate the association between very preterm birth and adolescence emotional problems and peer victimization. It was shown that higher self-control skills in childhood predict lower emotional problems and peer victimization in adolescence similarly in very preterm and full-term borns.