Comparison of two strategies to improve infant sleep problems, and associated impacts on maternal experience, mood and infant emotional health: a single case replication design study

Background

Infant sleep problems (ISP) are common and have known effects on parental mood. There is debate as to whether treatment strategies may impact on the infant's emotional health.

Aims

To compare the effectiveness of two treatment strategies for ISP on the infant's sleep, maternal mood, and the infant's emotional health. The two strategies are 1) systematic ignoring with minimal check (‘SI-mc’: commonly known as ‘controlled crying’), and 2) a new, but similar, method where parents feign sleep inside the infant's room before intervening (parental presence with minimal check: ‘PP-mc’).

Design

Participants were randomised to one of the two conditions. Measures were taken at baseline, then three weeks and four months post-intervention.

Subjects

Data were collected from 16 families with infants aged 6–18 months who were seeking professional help with their infant's sleep difficulties.

Outcome measures

Measures of infant sleep, maternal experiences and mood, and infant emotional health were collected.

Results

Both treatments were effective, with a third to a half of families reporting decreased ISP by 3 week post intervention, and nearly all reporting decreased ISP by follow-up. Similarly, most mothers in both treatments reported improvements to their experiences or mood, and there was no discernable disruption to infant emotional health.

Conclusions

These findings support previous research into the effectiveness of SI-mc. The study also expands the research into the effectiveness of parental presence by showing that with the inclusion of the minimal check component, which may be preferred by both parents and clinicians over non-responding to the crying infant, the strategy is as effective as SI-mc.     

Aerobic exercise during pregnancy influences infant heart rate variability at one month of age

Background

Previously, we reported that regular maternal aerobic exercise during pregnancy was associated with lower fetal heart rate (HR) and higher heart rate variability (HRV) at 36 weeks gestation. We now report the effect of maternal exercise on infant HR and HRV in subjects who remained active in the study at the one-month follow up visit.

Aims

We aimed to determine whether differences in fetal cardiac autonomic control related to maternal physical activity were an in utero phenomenon or would persist 1 month after birth.

Study design

Magnetocardiograms (MCGs) of infants born to regularly exercising (≥ 30 min of aerobic activity, 3 times per week; N = 16) and non-exercising (N = 27) pregnant women were recorded using a fetal biomagnetometer. Normal R-peaks were marked to derive infant HR and HRV in time and frequency domains, including the root mean square of successive differences (RMSSD), the standard deviation of normal-to-normal interbeat intervals (SDNN), and power in the low frequency (LF) and high frequency (HF) bands. Group differences were examined with Student's t-tests.

Results

Infants born to exercising women had significantly higher RMSSD (P = 0.010), LF power (P = 0.002), and HF power (P = 0.004) than those born to women who did not engage in regular physical activity while pregnant.

Conclusion

Infants born to women who participated in regular physical activity during pregnancy continued to have higher HRV in the infant period. This suggests that the developing cardiac autonomic nervous system is sensitive to the effects of maternal physical activity and is a target for fetal programming.     

Gross motor development in full-term Greek infants assessed by the Alberta Infant Motor Scale: Reference values and socioeconomic impact

Objective

The aims of this study were to investigate gross motor development in Greek infants and establish AIMS percentile curves and to examine possible association of AIMS scores with socioeconomic parameters.

Methods

Mean AIMS scores of 1068 healthy Greek full-term infants were compared at monthly age level with the respective mean scores of the Canadian normative sample. In a subgroup of 345 study participants, parents provided, via interview, information about family socioeconomic status. Multiple linear regression analysis was performed to evaluate the relationship of infant motor development with socioeconomic parameters.

Results

Mean AIMS scores did not differ significantly between Greek and Canadian infants in any of the 19 monthly levels of age. In multiple linear regression analysis, the educational level of the mother and also whether the infant was being raised by grandparents/babysitter were significantly associated with gross motor development (p = 0.02 and p < 0.001, respectively), whereas there was no significant correlation of mean AIMS scores with gender, birth order, maternal age, paternal educational level and family monthly income.

Conclusions

Gross motor development of healthy Greek full-term infants, assessed by AIMS during the first 19 months of age, follows a similar course to that of the original Canadian sample. Specific socioeconomic factors are associated with the infants' motor development.     

Infant developmental outcomes following prenatal exposure to antidepressants,and maternal depressed mood and positive affect

Background

Prenatal exposure to serotonin reuptake inhibitor (SRI) antidepressants has been associated with delays in early developmental milestones, but there remains uncertainty. Even among a subset of studies examining the Bayley Scales of Infant Development (BSID), some have reported normal mental and psychomotor development while others have suggested a delay in motor development. Given an increasing number of infants exposed to SRIs, furthering our understanding of the possible developmental implications of SRI exposure in utero is critical.

Aims

To examine the effects of prenatal serotonin reuptake inhibitor exposure and maternal mood on infant developmental outcomes at 10 months of age.

Study design

Prospective study of mothers and their 10-month-old infants.

Subjects

We examined 31 mother–child pairs exposed prenatally to SRIs and 52 mother–child pairs who were nonexposed.

Outcome measure

The Bayley Scales of Infant Development (third edition) scores.

Results

Infants exposed prenatally to SRIs scored significantly lower than nonexposed infants on gross motor (P = 0.03), social–emotional (P = 0.04) and adaptive behavior (P = 0.05) subscales of the BSID-III, controlling for pre- and postnatal maternal depressed mood, smoking and alcohol use during pregnancy. No significant differences in any of the BSID-III subscales were observed between infants exposed and infants nonexposed to pre and postnatal maternal depressed mood (P > 0.05). Increased levels of maternal positive affect at 10 months predicted increased social–emotional scores (P = 0.03).

Conclusions

Infants prenatally exposed to SRIs score significantly lower on the gross motor, social–emotional and adaptive behavior subscales of the BSID-III, and this was not explained by underlying maternal depression.     

The relation of infant attachment to attachment and cognitive and behavioural outcomes in early childhood

Background

In China, research on the relation of mother–infant attachment to children's development is scarce.

Aims

This study sought to investigate the relation of mother–infant attachment to attachment, cognitive and behavioural development in young children.

Study design

This study used a longitudinal study design.

Subjects

The subjects included healthy infants (n = 160) aged 12 to 18 months.

Outcome measures

Ainsworth's “Strange Situation Procedure” was used to evaluate mother–infant attachment types. The attachment Q-set (AQS) was used to evaluate the attachment between young children and their mothers. The Bayley scale of infant development-second edition (BSID-II) was used to evaluate cognitive developmental level in early childhood. Achenbach's child behaviour checklist (CBCL) for 2- to 3-year-olds was used to investigate behavioural problems.

Results

In total, 118 young children (73.8%) completed the follow-up; 89.7% of infants with secure attachment and 85.0% of infants with insecure attachment still demonstrated this type of attachment in early childhood (κ = 0.738, p < 0.05). Infants with insecure attachment collectively exhibited a significantly lower mental development index (MDI) in early childhood than did infants with secure attachment, especially the resistant type. In addition, resistant infants were reported to have greater social withdrawal, sleep problems and aggressive behaviour in early childhood.

Conclusion

There is a high consistency in attachment development from infancy to early childhood. Secure mother–infant attachment predicts a better cognitive and behavioural outcome; whereas insecure attachment, especially the resistant attachment, may lead to a lower cognitive level and greater behavioural problems in early childhood.     

Leptin,fetal growth and insulin resistance in non-diabetic pregnancies

Background

Interrogation of the association between leptin, insulin resistance and fetal growth may provide a biological link for the fetal programming of later metabolic health.

Aims

Our aim was to clarify the relationship between maternal and fetal leptin, insulin resistance and fetal growth.

Study design

Maternal leptin, glucose and insulin were measured in early pregnancy and at 28 weeks and the HOMA index calculated. At 34 weeks, ultrasound scan assessed fetal weight and adiposity (abdominal wall width). At delivery birthweight was recorded and cord blood analyzed for fetal c-peptide and leptin. Analysis was performed using a multivariate linear regression model.

Subjects

574 non-diabetic pregnant women.

Outcome measures

Fetal growth and maternal and fetal insulin resistance.

Results

On multivariate analysis a relationship was identified between maternal and fetal leptin concentrations at each time point and maternal body mass index. Maternal leptin was related to insulin resistance in early pregnancy (β = 0.15, p = 0.02) and at 28 week gestation (β = 0.27, p < 0.001). Fetal insulin resistance correlated with maternal leptin in early pregnancy (β = 0.17, p = 0.004); at 28 weeks (β = 0.12, p = 0.05), and with leptin in cord blood (r = 0.28, p < 0.001).Fetal weight at 34 weeks was related to maternal leptin in early pregnancy (β = 0.16, p = 0.02). Both maternal and fetal leptin correlated with infant size at birth (β = 0.12, p = 0.07 in early pregnancy, β = 0.21, p = 0.004 in cord blood), independent of all other outcome measures.

Conclusion

Our findings have confirmed that in a non-diabetic cohort there is a link between maternal and fetal leptin and insulin resistance. We also established a link between maternal leptin in early pregnancy and both fetal and neonatal size. These results add to the growing body of evidence suggesting a role for leptin in the fetal programming of childhood obesity and metabolic dysfunction.     

Infant rolling abilities – the same or different 20 years after the back to sleep campaign?

Aim

To compare the order and age of emergence of rolling prone to supine and supine to prone before the introduction of back to sleep guidelines and 20 years after their introduction.

Methods

The original normative data for the Alberta Infant Motor Scale (AIMS) were collected just prior to the introduction of back to sleep guidelines in 1992. Currently these norms are being re-evaluated. Data of rolling patterns of infants 36 weeks of age or younger from the original sample (n = 1114) and the contemporary sample (n = 351) were evaluated to compare the sequence of appearance of prone to supine and supine to prone rolls (proportion of infants passing each roll) and the ages of emergence (estimated age when 50% of infants passed each roll).

Results

The sequence of emergence and estimated age of appearance of both rolling directions were similar between the two time periods.

Conclusion

The introduction of the supine sleep position to reduce the prevalence of Sudden Infant Death Syndrome (SIDS) has not altered the timing or sequence of infant rolling abilities. This information is valuable to health care providers involved in the surveillance of infants’ development. Original normative age estimates for these two motor abilities are still appropriate.     

Typical sleep positions in pregnant women

Objective

Maternal supine posture in late pregnancy and labor is known to compromise maternal hemodynamics and subsequently affect the fetus. Recently, maternal supine sleep position during late pregnancy has been postulated to play a role in stillbirth. However, no objective data exist regarding how often pregnant women sleep supine. This study was therefore conducted to determine the proportion of pregnant women who spend time asleep in the supine position.

Methods

A secondary analysis of data from pregnant women who underwent home sleep studies.

Results

Of 51 pregnant women, mean gestational age 28.3 ± 6.9 weeks, the vast majority of women (82.4%) spent some time sleeping in the supine position. The median proportion of overall time spent in the supine sleep position was 26.5% (90%CI 0.0–82.9%).

Conclusion

Our data suggest that if supine position plays a role in stillbirth, most women may benefit from education regarding sleep position.

Practice implications

Most pregnant women spend time asleep on their back. Given the known data on supine posture and maternal cardiovascular compromise together with emerging data on supine sleep position and stillbirth, it may be pertinent for healthcare providers to provide pregnant women with information about sleep position particularly during late pregnancy.     

Relationship between duration of crying/fussy behavior and actigraphic sleep measures in early infancy

Objective

The objective of the study is to understand the relationship between sleep development and crying episodes during early infancy more accurately by longitudinal and objective sleep evaluations.

Design

The study is designed as a prospective longitudinal study of infants in the first 4 months of life.

Methods

This study included 31 healthy term infants. At approximately 4- to 6-week intervals, when the infants were aged 4–6 weeks, 8–10 weeks, and 14–16 weeks, their mothers recorded the duration of crying/fussy behavior of infants in a timetable and attached an actigraph to the infants for 3 days. The relationship between 24-h crying/fussy behavior duration and actigraphic sleep measures was examined from both a cross-sectional (age group) and longitudinal (within-infants) perspective. Interactions with diverse covariates were studied by multiple regression analysis.

Results

A significant correlation was found between 24-h crying/fussy behavior duration and proportion of active sleep in infants at 14–16 weeks and in within-infant relationships. Among potential covariates, gestational age and co-sleeping had a significant impact on proportion of active sleep. Results of multiple regression analysis showed that gestational age and co-sleeping were positively associated with proportion of active sleep, whereas 24-h crying/behavior duration was not associated with proportion of active sleep.

Conclusions

Subsiding of early crying and decreasing of proportion of active sleep are parallel phenomena in some infants. However, this association was thought to be attributable to the influence of covariates, including co-sleeping or gestational age. The underlying mechanisms regulating these developmental processes might overlap with one another, as covariates that affect one process could affect the other.     

Maternal emotional availability at bedtime and infant cortisol at 1 and 3 months

Background

Previous work has shown that early experience influences infant cortisol secretion. Few studies, however, have examined associations between parenting quality and cortisol levels and patterning in very young infants.

Aims

This study examined linkages between maternal emotional availability (EA) during a routine caregiving task, bedtime, and infant cortisol in the first 3 months of life. Concurrent and longitudinal associations between maternal EA and infant cortisol were examined.

Study design

Families were visited when their infants were 1 and 3 months old. Video equipment was set up in order to record the infant's bedtime routine. Parents were provided with materials with which to take saliva samples from their infants at late afternoon, bedtime, and the following morning.

Subjects

At 1 month, participants were 96 mothers and infants living in a rural U.S. state. Data were available for 88 mothers and infants at 3 months.

Outcome measures

Maternal EA was scored from videotapes of bedtime at each age point. Infant cortisol was assessed from the saliva samples taken by parents.

Results

Regression analyses indicated that at 1 and 3 months of age, infants of more emotionally available mothers showed lower levels of cortisol secretion across the night than infants of less emotionally available mothers. Additionally, multilevel model analyses indicated that infants of more emotionally available mothers showed greater evidence of a decline in their cortisol levels across the evening, followed by an increase across the nighttime into the morning in their cortisol at 3 months.

Conclusions

Findings suggest that maternal care in the context of a routine caregiving task is associated with lower stress reactivity and with earlier circadian patterning in very young infants.     

Maternal consumption of a DHA-containing functional food benefits infant sleep patterning: an early neurodevelopmental measure

Background

Docosahexaenoic acid (DHA; 22:6n − 3) is highly important during pregnancy for optimal development and functioning of fetal neural tissue. Infant ability to organize sleep and wake states following parturition is highly associated with later developmental outcomes. The impact of maternal DHA intake on sleep organization has not been previously investigated.

Aims

To examine the effect of a DHA-containing functional food consumed during pregnancy on early neurobehavioral development as assessed by infant sleep patterning in the first 48 postnatal hours.

Study design

A longitudinal, randomized, double-blinded, placebo-controlled design was used.

Subjects

Women (18–35 y) with no pregnancy complications consumed a cereal-based functional food (92 kcal) containing 300 mg DHA an average of 5 d/week or placebo bars (n = 27 DHA, n = 21 Placebo). The intervention began at 24 weeks gestation and continued until delivery (38–40 weeks).

Outcome measures

Infant sleep/wake states were measured on postnatal days 1 (D1) and 2 (D2) using a pressure sensitive mattress recording respiration and body movements.

Results

Using ANCOVA and controlling for ethnic variation, there were significant group differences in arousals in quiet sleep on D1 (P = 0.006) and D2 (P = 0.011) with fewer arousals in the DHA intervention group compared to the placebo group. Similarly, arousals in active sleep on D1 were significantly lower in the DHA-intervention group (P = 0.012) compared to the placebo group.

Conclusions

We conclude that increased prenatal supply of dietary DHA has a beneficial impact on infant sleep organization.     

Parenting stress in mothers of very preterm infants — Influence of development,temperament and maternal depression

Objective

To measure levels of parenting stress and postnatal depression in mothers of very preterm infants in comparison with mothers of infants born at term is the objective of this study. The study also aimed to explore factors associated with parenting stress in the mothers of the preterm infants.

Methods

One hundred and five mothers who delivered 124 babies at ≤ 30 weeks gestation were enrolled together with 105 term mothers who delivered 120 babies. At one year of age (corrected for prematurity for the preterm cohort), the mothers completed the Parenting Stress Index Short Form (PSI), the Edinburgh Postnatal Depression Scale (EPDS) and the Short Temperament Scale for Toddlers. The infants had neurodevelopmental assessment. The preterm and term groups were compared.

Results

Questionnaires were completed by 101 of the preterm mothers and 98 of the term mothers. The mean PSI Total Stress score was significantly higher for the preterm mothers (70.28 vs 64.52, p = 0.022), with 19% of the preterm group and 9% of the term group having high scores (p = 0.038).There was no group difference on the EPDS or measures of temperament, with disability being greater in the preterm infants. For the preterm group, maternal depression and infant temperament were independent predictors of Total Stress scores on multivariate analysis.

Conclusions

Parenting stress in mothers of preterm infants at one year of age is significantly greater than that found in mothers of term infants. For preterm mothers, symptoms of depression and infant temperament are independent risk factors for higher levels of parenting stress.     

A comparison of parent and staff perceptions of setting-specific and everyday stressors encountered by parents with very preterm infants experiencing neonatal intensive care

Background

Stress responses among parents of premature infants experiencing the neonatal intensive care unit (NICU) environment are widely reported. However, less is known about how nurses perceive parents' experiences or how stressors relating to demands on family finances and practical challenges associated with infant hospitalization contribute to parental stress levels in the NICU.

Objective

1) To compare parent and staff perceptions of the stressors facing parents experiencing neonatal intensive care; and 2) to develop a scale suitable for identifying stressors outside the NICU setting.

Methods

At infant 34 weeks, parents (n = 21) of very preterm infants (≤ 32 weeks GA) and NICU nurses (n = 23) completed the Parental Stressor Scale: NICU (PSS: NICU) and a custom-made External Stressor Scale (ESS: NICU).

Results

Nurses perceived parents to experience higher stress in the NICU than parents themselves (ps < 0.00001), with parents reporting low-to-moderate stress and staff rating parental stress as moderate-to-high. Parents reported slightly lower levels of stress on the ESS: NICU, with nurses again overestimating the level of parental stress (ps < 0.00001). Consideration of the extent of nurses' medical experience did not alter results. The ESS: NICU showed good internal reliability, with PCAs revealing all items to load onto a single component. Additional analyses demonstrated divergent validity, with no relation evident with stress responses on the PSS: NICU.

Conclusions

Periodic reassessments of staff and parent perceptions should be encouraged along with research dedicated to a fuller understanding of the range of stressors facing parents experiencing neonatal intensive care in attempts to reduce stress levels and aid integration into the unit.     

Parental psychological distress during pregnancy and childhood cardiovascular development. The Generation R Study

Background

Maternal psychological distress during pregnancy might lead to higher fetal cortisol exposure, which subsequently leads to fetal cardiovascular developmental adaptations and cardiovascular dysfunction in later life.

Aims

We examined whether maternal and paternal psychological distress was associated with the cardiovascular outcome measurements in school age children.

Study design and subjects

In a population-based prospective cohort study among 4831 children, we assessed maternal and paternal psychological distress during pregnancy by questionnaire, using the Brief Symptom Inventory (see Fig. 1).

Outcome measures

At the child age of six years, we performed blood pressure and carotid–femoral pulse wave velocity measurements, and M-mode measurements of left cardiac structures and fractional shortening.

Results

We did not observe associations of high maternal and paternal psychological symptom scores with childhood blood pressure and carotid–femoral pulse wave velocity after adjustment for potential confounders. Maternal overall psychological symptoms were associated with a lower childhood left ventricular mass (difference − 1.10 g (95% confidence interval − 2.13 to − 0.07) between mothers with high scores and normal scores), but not with other cardiac structures and fractional shortening. Paternal overall psychological symptoms showed a similar association with childhood left ventricular mass (difference − 1.34 grams (95% confidence interval − 3.69 to 1.02) between fathers with high scores and normal scores).

Conclusions

Our results do not support the hypothesis that maternal psychological distress affects cardiovascular development in early life. Similar associations of maternal and paternal psychological distress with left ventricular mass suggest that these associations could be due to unmeasured social and environmental factors, rather than direct intra-uterine effects.     

Early communication in preterm infants following intervention in the NICU

Background

Despite ongoing improvements in clinical care, preterm infants experience a variety of stressors in the first weeks of life, including necessary medical procedures, which may affect development. Some stress-reduction programmes based in the Neonatal Intensive Care Unit (NICU) have reported a positive impact on development. In particular, trials of the Mother–Infant Transaction Program (MITP) have shown positive short and longer term effects, and are based on training parents to recognise and minimise stress responses in preterm infants.

Aims

To evaluate the impact on early developmental milestones of an enhanced MITP (PremieStart) delivered over an extended period in the NICU.

Study design

This was a parallel 2-group randomised controlled trial involving 109 women with 123 infants born at < 30 weeks gestation assessed initially at term-equivalent age and then at 6 months' corrected-age.

Results

Intervention mothers were more sensitive in providing infant care, stressed their infants less, showed greater awareness of, and responded more appropriately to, negative infant cues (p < 0.05 in each case). Intervention infants displayed significantly lower stress when being bathed by mothers at term-equivalent age (p < 0.05). At 6 months corrected-age, intervention infants showed higher mean scores on the Communication and Symbolic Behavior Scales Developmental Profile Infant–Toddler Checklist. The strongest effects appeared in Symbolic behaviour (p = 0.05) and this was reflected in the Total score (p < 0.05).

Conclusions

As significant cognitive and language deficits are reported in longitudinal studies of preterm children, an intervention that improves early infant communication abilities is promising, especially since previous research suggests that the strongest benefits may emerge at later ages.     

Parenting self-efficacy: Links with maternal depression,infant behaviour and adult attachment

Background

This study examined predictors of parenting self-efficacy (PSE) in a sample of first-time mothers during the first year after childbirth and evaluated the effect of a brief, intensive, mother–infant residential intervention on PSE and infant behaviour.

Methods

83 primiparous women with infants aged 0–12 months admitted to a residential parent–infant program participated in a structured clinical interview for DSM-IV diagnosis of depressive and anxiety disorders and completed questionnaires assessing psychological distress, adult attachment and childhood parenting experiences. During their residential stay, nurses recorded infant behaviour using 24-hour charts.

Results

Results showed PSE to be inversely correlated with maternal depression, maternal anxiety and attachment insecurity. Low levels of parental abuse during childhood, avoidant attachment, male infant gender and depressive symptom severity were found to predict low PSE. Major depression mediated the relation between attachment insecurity and PSE, but there were no links between PSE and infant behaviour. After the intervention, there was a significant improvement in PSE, with abusive parenting during childhood and depressive symptom severity being predictive of change.

Conclusions

This study highlights the links between maternal psychopathology and maternal background factors such as childhood parenting experiences and attachment style in the development of postnatal PSE. Directions for future research are discussed.     

Social competence of preschool children born very preterm

Background

Relatively little is known about the early social development of children born very preterm despite clear suggestions of later interpersonal difficulties.

Aims

To compare the social competence of very preterm (VPT) and full term (FT) born children at age 4 and identify infant, social and family factors associated with later risk.

Study design

Prospective longitudinal study.

Subjects

A regionally representative cohort of 103 VPT (≤ 32 weeks gestation) children and a comparison group of 105 FT children (36–41 weeks gestation) born between 1998 and 2000.

Outcome measures

At corrected age 4 years, a range of parent report, observational and laboratory measures assessed children's emotional and behavioral adjustment, emotional regulation, social interactive behavior and theory of mind understanding. Extensive perinatal, social background and family functioning data were also available from birth to age 4.

Results

Compared to their FT peers, VPT born children had poorer emotional and behavioral adjustment, were less effective in regulating their emotions, had lower levels of positive peer play and had less synchronous interactions with their parents. Within the VPT group, predictors of poor social competence included family socioeconomic disadvantage, extreme prematurity, severity of cerebral white matter abnormalities and early childhood exposure to high levels of maternal anxiety and negative parenting.

Conclusions

VPT pre-schoolers are characterized by a range of subtle social difficulties likely to adversely affect their ability to establish and maintain positive relationships with others. These difficulties need to be monitored alongside other potential neurodevelopmental concerns and parents supported to actively nurture child social competence.     

Infant cardiac surgery and the father–infant relationship: Feelings of strength,strain, and caution

Objective

The purpose of this study was to examine the father–infant relationship in infants with congenital heart disease (CHD).

Method

Sixty-three fathers whose infants had cardiac surgery before 3 months of age reported on their attachment relationship with their infant within two months of hospital discharge using both qualitative and quantitative methods.

Results

Mean scores on the Paternal Postnatal Attachment Scale and scores for patience and tolerance were not different from previously published community norms, ps > .05. Scores for pleasure and interaction (t[50] = − 2.383, p = .021, CI: − 2.93, − .25) and affection and pride subscale (t[56] = − 2.935, p = .005, CI: − 1.20, − .23) were significantly lower than community norms. Additionally, 37% of fathers described feeling a strong relationship with their infant whereas 17% reported initial apprehension or condition-specific worry. Fathers with infants who spent fewer days at home prior to admission reported feelings of relationship strain as well as lower pleasure in interaction, affection and pride, patience and tolerance, and overall attachment quality.

Conclusion

Having an infant with CHD affects some father–infant relationships differently than others with some fathers feeling closer to their infant and other fathers feeling reservation about getting too close. One explanation for these differences may be that spending a great deal of time in hospital restricts the number and quality of interactions infants have with their fathers. Opportunities for intervention include clinical psychosocial services encouraging fathers to interact with and provide physical care of their infant, especially if fathers perceive their infant as medically fragile.     

Quantification of neonatal amplitude-integrated EEG patterns

Background

Amplitude-integrated EEG (aEEG) is increasingly used in research with premature infants; however, comprehensive interpretation is limited by the lack of simple approaches for reliably quantifying and summarizing the data.

Aim

Explore operational measures for quantifying continuity and discontinuity, measured by aEEG as components of infant brain function.

Study design

An exploratory naturalistic study of neonates while in the Neonatal Intensive Care Unit (NICU). One single channel aEEG recording per infant was obtained without disruption of nursing care practices.

Subjects

24 infants with mean postmenstrual age (PMA) of 33.11 weeks (SD 3.49), average age of 2.62 weeks (SD 1.35) and mean birth weights of 1.39 kg (SD 0.73).

Outcome measures

Quantification of continuity and discontinuity included bandwidth and lower border of aEEG, calculated proportion of time with signal amplitude below 10 μV, and peak counts. Variance of bandwidth and lower border denoted cycling.

Results

Group mean bandwidth was 52.98 μV (SD 27.62). Median peak count in 60 second epochs averaged 3.63 (SD 1.74), while median proportion < 10 μV was 22% (SD 0.20). The group mean of lower border within-subject aggregated medians was 6.20 μV (SD 2.13). Group mean lower border standard deviation was 3.96 μV. Proportion < 10 μV showed a strong negative correlation with the natural log of the lower border median (r = − 0.906, p < .0001) after controlling for PMA.

Conclusions

This study introduces a novel quantification process by counting peaks and proportion of time < 10 μV. Expanded definitions and analytic techniques will serve to strengthen the application of existing scoring systems for use in naturalistic research settings and clinical practice.