Objective Although many perinatal factors have been linked to adverse neurodevelopmental outcomes in very premature infants, much of the variation in outcome remains unexplained. The impact on brain development of one potential factor, exposure to stressors in the Neonatal Intensive Care Unit, has not yet been studied in a systematic, prospective manner. Methods In this prospective cohort study of infants born at <30 weeks gestation, nurses were trained in recording procedures and cares. These recordings were used to derive Neonatal Infant Stressor Scale scores, which were employed to measure exposure to stressors. Magnetic resonance imaging (brain metrics, diffusion, and functional magnetic resonance imaging) and neurobehavioral examinations at term equivalent postmenstrual age were used to assess cerebral structure and function. Simple and partial correlations corrected for confounders including immaturity and severity of illness were used to explore these relationships. Results Exposure to stressors was highly variable, both between infants and throughout a single infant’s hospital course. Exposure to a greater number of stressors was associated with decreased frontal and parietal brain width, altered diffusion measures and functional connectivity in the temporal lobes, and abnormalities in motor behavior on neurobehavioral examination. Interpretation Exposure to stressors in the Neonatal Intensive Care Unit is associated with regional alterations in brain structure and function. Further research into interventions that may decrease or mitigate exposure to stressors in the Neonatal Intensive Care Unit is warranted.

Childhood psychological conditions including depression and substance abuse are a growing concern among American children, but their long-term economic costs are unknown. This paper uses unique data from the US Panel Study of Income Dynamics (PSID) following groups of siblings and their parents for up to 40 years prospectively collecting information on education, income, work, and marriage. Following siblings offers an opportunity to control for unobserved family and neighborhood effects. A retrospective child health history designed by the author was placed into the 2007 PSID wave measuring whether respondents had any of 14 childhood physical illnesses or suffered from depression, substance abuse, or other psychological conditions. Large effects are found on the ability of affected children to work and earn as adults. Educational accomplishments are diminished, and adult family incomes are reduced by 20% or $10,400 per year with $18,000 less family household assets. Lost income is a partly a consequence of seven fewer weeks worked per year. There is also an 11 percentage point lower probability of being married. Controlling for physical childhood diseases shows that these effects are not due to the co-existence of psychological and physical diseases, and estimates controlling for within-sibling differences demonstrate that these effects are not due to unobserved common family differences.The long-term economic damages of childhood psychological problems are large-a lifetime cost in lost family income of approximately $300,000, and total lifetime economic cost for all those affected of 2.1 trillion dollars.

ObjectiveTo explore differences in maternal factors, including visitation and holding, among premature infants cared for in single patient rooms (SPR) compared to open-bay in the neonatal intensive care unit (NICU).Study DesignEighty-one premature infants were assigned to a bed space in either the open-bay area or in a SPR upon NICU admission, based on bed space and staffing availability in each area. Parent visitation and holding were tracked through term equivalent, and parents completed a comprehensive questionnaire at discharge to describe maternal health. Additional maternal and medical factors were collected from the medical record. Differences in outcome variables were investigated using linear regression.ResultsNo significant differences in gestational age at birth, initial medical severity, hours of intubation, or other factors that could affect the outcome were observed across room type. Significantly more hours of visitation were observed in the first two weeks of life (p=.02) and in weeks three and four (p=.02) among infants in the SPR. More NICU stress was reported by mothers in the single patient room after controlling for social support (p=.04).ConclusionsIncreased parent visitation is an important benefit of the SPR, however, mothers with infants in the SPR reported more stress.

ObjectiveTo investigate the effects of parental presence and infant holding in the NICU on neurobehavior at term equivalent.Study DesignProspective cohort enrolled 81 infants born <30 weeks gestation. Nurses tracked parent visitation, holding, and skin-to-skin care throughout the NICU hospitalization. At term, the NICU Network Neurobehavioral Scale was administered. Associations between visitation, holding, and early neurobehavior were determined using linear and logistic regression.ResultsThe mean hours/week of parent visitation was 21.33±20.88 (median= 13.90; interquartile range 10.10–23.60). Infants were held an average of 2.29±1.47 days/week (median= 2.00; interquartile range 1.20–3.10). Over the admission, visitation hours decreased (p=0.01), while holding frequencies increased (p<0.001). More visitation was associated with better quality of movement (p=0.02), less arousal (p=0.01), less excitability (p=0.03), more lethargy (p=0.01) and more hypotonia (p<0.01). More holding was associated with improved quality of movement (p<0.01), less stress (p<0.01), less arousal (p=0.04) and less excitability (p<0.01).InterpretationInfants of caregivers who were visited and held more often in the NICU had differences in early neurobehavior by term equivalent, which supports increased early parenting in the NICU.

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