Mother's Emotional and Posttraumatic Reactions after a Preterm Birth: The Mother-Infant Interaction Is at Stake 12 Months after Birth

Posttraumatic stress disorder prevalence and childbirth: update meta-analysis after the introduction of the DSM-5 and COVID-19 pandemic

PURPOSE

Meta-analyses were previously performed to estimate PTSD prevalence in the postpartum period. Significant events that could impact this outcome occurred in the last decade, such as the publication of the DSM-5 in 2013 and the COVID-19 pandemic in 2020. This systematic literature review with a meta-analysis addressed studies published after 2014 to estimate PTSD prevalence after childbirth.

METHOD

The methodological guidelines recommended by PRISMA were followed. The meta-analysis estimate was the proportion of PTSD cases. The restricted maximum likelihood (REML) was the method adopted for estimation in addition to multilevel random effect models. Subgroup analyses were performed to assess the impact of interest variables.

RESULTS

The estimated prevalence was 0.10 (95%CI: 0.8-0.13; I2 = 98.5%). No significant differences were found regarding the introduction of the DSM-5 (p = 0.73) or COVID-19 (p = 0.97), but instead, between low- and middle-income countries, e.g., the Middle East presents a higher prevalence (p < 0.01) than European countries.

CONCLUSIONS

There is a potential increase in PTSD prevalence rates after childbirth in the last decade not associated with the pandemic or the current diagnostic classification. Most studies showed a methodological fragility that must be overcome to understand this phenomenon better and support preventive actions and treatment for puerperal women.

Application of Trauma-Informed Care Principles to Care Needs Identified by Mothers of NICU-Hospitalized Children

Systematic uptake of family-centered care (FCC) interventions remains challenging and frequently suboptimal in many neonatal intensive care units (NICUs). Across NICUs in the United States, integrating family members as partners in infant caregiving and decision-making has not been well supported and routine screening and provision of psychological support for parents remains inadequate. Trauma-informed care (TIC) may offer a more comprehensive approach to NICU care which can encompass FCC principles and promote family recovery and resilience by recognizing and responding to the traumas experienced by NICU infants and families. The current paper aimed to understand needs identified by mothers of NICU-hospitalized children and reports a focused analysis of one-on-one interview data (n = 13 mothers) collected during a larger mixed methods study. Reflexive thematic analysis was used to understand needs identified by mothers and to explore how these needs aligned with TIC principles. Six themes were identified and subsequently examined in the context of the principles of TIC: I Just Had No Control, That Really Caught Us Off Guard, So Much Was Already Taken Away, We're People and There Needs To Be More Support and Practices Which Helped. Mothers' care needs were found to align with TIC principles. Findings suggest that implementation of TIC principles in NICU settings can support parental presence, participation in infant care, and mental health and support the potential of TIC as a more comprehensive approach to meeting the needs of NICU parents.

Multidimensional assessment of infant, parent and staff outcomes during a family centered care enhancement project in a tertiary neonatal intensive care unit: study protocol of a longitudinal cohort study

BACKGROUND

The therapeutic advances and progress in the care for preterm infants have enabled the regular survival of very immature infants. However, the high burden of lifelong sequelae following premature delivery constitutes an ongoing challenge. Regardless of premature delivery, parental mental health and a healthy parent-child relationship were identified as essential prerogatives for normal infant development. Family centered care (FCC) supports preterm infants and their families by respecting the particular developmental, social and emotional needs in the Neonatal Intensive Care Unit. Due to the large variations in concepts and goals of different FCC initiatives, scientific data on the benefits of FCC for the infant and family outcome are sparse and its effects on the clinical team need to be elaborated.

METHODS

This prospective single centre longitudinal cohort study enrols preterm infants ≤ 32 + 0 weeks of gestation and/or birthweight ≤ 1500 g and their parents at the neonatal department of the Giessen University Hospital, Giessen, Germany. Following a baseline period, the rollout of additional FCC elements is executed following a stepwise 6-months approach that covers the NICU environment, staff training, parental education and psychosocial support for parents. Recruitment is scheduled over a 5.5. year period from October 2020 to March 2026. The primary outcome is corrected gestational age at discharge. Secondary infant outcomes include neonatal morbidities, growth, and psychomotor development up to 24 months. Parental outcome measures are directed towards parental skills and satisfaction, parent-infant-interaction and mental health. Staff issues are elaborated with particular focus on the item workplace satisfaction. Quality improvement steps are monitored using the Plan- Do- Study- Act cycle method and outcome measures cover the infant, the parents and the medical team. The parallel data collection enables to study the interrelation between these three important areas of research. Sample size calculation was based on the primary outcome.

DISCUSSION

It is scientifically impossible to allocate improvements in outcome measures to individual enhancement steps of FCC that constitutes a continuous change in NICU culture and attitudes covering diverse areas of change. Therefore, our trial is designed to allocate childhood, parental and staff outcome measures during the stepwise changes introduced by a FCC intervention program.

TRIAL REGISTRATION

Clinicaltrials.gov, trial registration number NCT05286983, date of registration 03/18/2022, retrospectively registered, http://clinicaltrials.gov .

The trajectories of physical growth in 4 months postnatal corrected age among preterm infants discharged from neonatal intensive care units and associated factors: A prospective study

Objectives

Growth retardation is a risk for premature infants. In addition to demographic and perinatal factors, preterm infants' physical growth may be affected by neonatal intensive care unit (NICU) stress, maternal postpartum depression, and mother-infant interaction. This study aimed to investigate the trajectories of physical growth in 4 months corrected age among preterm infants discharged from the NICU and the impactors on these trajectories.

Methods

A prospective study was conducted among 318 preterm infants from September 2019 to April 2021 in Shanghai, China. Latent growth modeling was applied to identify the weight, length, and head circumference growth trajectories in 4 months corrected age and explore the effects of demographic and medical characteristics, infant stress during NICU stay, maternal postpartum depression, and mother-infant interaction on each trajectory.

Results

Unconditional latent growth models showed curve trajectories with increasingly slower growth in weight, length, and head circumference until 4 months of corrected age. Conditional latent growth models showed that a longer length of stay in the NICU and more skin punctures were negatively associated with weight at 40 weeks corrected gestational age (β = -0.43 and -0.19, respectively, P < 0.05). The maternal postpartum depression between 40 weeks corrected gestational age and 1 month corrected postnatal age was associated with a lower growth rate of length (β = -0.17, P = 0.040), while between 2 and 3 months corrected postnatal age, there were lower growth rates of weight and head circumference (β = -0.15 and -0.19, respectively, P < 0.05). The mother-infant interaction scores between 40 weeks corrected gestational age and 1 month corrected postnatal age negatively predicted the growth rate of weight (β = -0.19, P = 0.020).

Conclusion

The physical growth trajectories of preterm infants discharged from the NICU were influenced by infant stress during the NICU stay, maternal postpartum depression and mother-infant interaction.

Uncertainty and perinatal post-traumatic stress disorder in the neonatal intensive care unit

Parents of infants in the neonatal intensive care unit (NICU) are at increased risk of developing perinatal post-traumatic stress disorder (PPTSD), a mental health condition known to interfere with healthy parental and infant attachment. Feelings of uncertainty about illness have been theorized as an antecedent to post-traumatic stress, however the relationship has not been explored in parents of infants requiring care in the NICU. The purpose of this prospective study was to explore parental uncertainty during and after NICU discharge and the relationship between uncertainty and PPTSD. The sample consisted of 319 parents during NICU hospitalization and 245 parents at 3 months postdischarge. Parents who screened positive for PPTSD 3 months after hospital discharge reported more uncertainty both while in the NICU and 3 months after hospital discharge (p < 0.001). In parents with a personal or family history of mental illness, the moderated/mediating structural probit analysis showed no direct or indirect effect of uncertainty during hospitalization or at 3 months after hospital discharge on screening positive for PPTSD. In parents who did not report personal or family history of mental illness, uncertainty at 3 months after hospital discharge had a direct effect (b = 0.678, p < 0.001) and indirect mediating effect (b = 0.276, p < 0.001) on screening positive for PPTSD. The results provide actionable implications for mental health and NICU providers: (1) routine screening for uncertainty and risk factors including previous personal and family history of mental illness, and (2) the development of NICU follow-up support services to mitigate risk for PPTSD.

Childbirth related PTSD and its association with infant outcome: A systematic review

INTRODUCTION

Maternal postnatal mental health problems may negatively impact child development. Postpartum research has mainly focused on the impact of maternal depression and anxiety due to their high prevalence (13-25 % and 10-18 %, respectively). However, maternal childbirth-related PTSD (CB-PTSD) could be another important risk factor in child development (estimated prevalence: 4.7 %).

OBJECTIVE

We investigated whether maternal CB-PTSD (symptoms) are associated with a negative mother-child relationship and/or child developmental outcome for children aged 0-5 years. Furthermore, we examined whether maternal trauma-focused therapy can positively impact mother and child outcomes.

METHODS

We performed a systematic review by searching three databases (Embase, Medline, PsycInfo). Search terms involved: 'birth or delivery modes', 'PTSD psychological trauma', and 'child development or child behavior'. Two independent reviewers evaluated all eligible papers.

RESULTS

Thirty-five papers (30 samples) were included and qualitatively reported. Results suggest a negative association of maternal CB-PTSD (symptoms) with mother-infant attachment and child behavior. However, confounding factors may explain this association. The evidence on associations with breastfeeding, sleeping, socio-emotional development, and weight gain is insufficient. Research investigating the effect of maternal trauma-focused therapy on a child's outcome is scarce, contradictory, and of low quality.

CONCLUSION

This systematic review suggests that maternal CB-PTSD may be associated with an increased number of problems in mother-infant attachment and child behavior, but other domains remain scarcely investigated and methodologic issues are present (cross-sectional study design, influence of confounding variables, sample representativeness, diversity in assessment tools). Our results support a multidisciplinary approach to providing early prevention and screening of the maternal mental health state.

Finding a New Normal: Maternal Experiences Transitioning to Home From the Neonatal Intensive Care Unit Caring for Technology-Dependent Infants

BACKGROUND

Infants discharged from the neonatal intensive care unit (NICU) dependent on medical technology (eg, respiratory or nutritional support) are a growing vulnerable population. These infants are medically fragile, prone to emergency department visits and readmissions, and require increased caregiver demands at home. The experiences of their maternal caregiver's after NICU discharge however, are not well understood.

PURPOSE

This qualitative descriptive study addressed this knowledge gap by interviewing mothers of technology-dependent infants about their experience during their first 2 weeks transitioning to home from the NICU. This is a critical period in which mothers must first assume advanced caretaking responsibilities in the home.

METHODS

Eight mothers participated in semistructured audio-recorded interviews via the Web conferencing system Zoom and completed demographic questionnaires.

RESULTS

Five themes emerged from the data that described essential features of the mothers' transition to home: (a) needing coordinated discharge care; (b) establishing a routine; (c) being an advocate; (d) having a support system; and (e) finding normalcy. An additional important finding of this study was the presence of maternal posttraumatic stress and postpartum depression.

IMPLICATIONS FOR PRACTICE

Results highlight the importance of providing mothers hands-on practice opportunities and identifying social support and home healthcare options prior to discharge of technology-dependent infants.

IMPLICATIONS FOR RESEARCH

Future research should focus on multidisciplinary interventions targeted toward discharge preparation, transitional support, and understanding maternal psychiatric symptoms among mothers of technology-dependent infants.

[Preterm birth: a risk for mental health?]

One in 12 children is born before 37 completed weeks of gestation and during the last decades survival rates and developmental outcomes of even very premature children have significantly improved. As a result, mental health sequelae of preterm birth are more frequently addressed. The manifestation of a distinct psychopathological profile with co-occurrence of symptoms associated with attention deficit/hyperactivity, autism spectrum and anxiety disorders has been recognized and discussed as "preterm behavioral phenotype", mainly affecting high-risk children with very low birth weights. Current research findings on parental psychological distress and early childhood developmental conditions after preterm birth indicate contextual factors that are of relevance, also for clinicians in psychotherapeutic practice.

The Influence of Maternal Cognitions Upon Motor Development in Infants Born Preterm: A Scoping Review

PURPOSE

This scoping review summarizes the extent, nature, and type of evidence linking broadly defined maternal cognitions to motor outcomes in infants born preterm. Maternal cognitions are beliefs, perceptions, or psychosocial attributes that inform parenting practices.

METHODS

Arksey and O'Malley's 5-step method was applied. Thirteen articles between 1980 and November 2019 met inclusion criteria.

RESULTS

Two key themes emerged with infants born preterm: (1) quality of the social and physical caregiving environment influence developmental outcomes with implications for motor development; and (2) complex interactions between environmental factors, prematurity-related biomedical risks, and maternal cognitions contribute to eventual motor outcomes.

CONCLUSION

Further research is needed to understand how maternal cognitions either scaffold or constrain early motor opportunities for infants born preterm and at risk for motor delays.

WHAT THIS ADDS TO THE EVIDENCE

This review summarizes studies that explore potential links between maternal cognitions and motor development in infants born preterm.

Mothers' experiences of caring for preterm babies at home: qualitative insights from an urban setting in a middle-income country

Background

Preterm delivery is the birth of a baby before 37 weeks of gestation. This global phenomenon is a critical issue of concern especially in developing countries that are resource-constrained when it comes to the management of preterm babies. Complications associated with prematurity contribute significantly to under-five mortality and are linked with feelings of despair, grief, and anxiety among mothers.

Methods

This was a qualitative descriptive study in an urban setting in the Greater Accra region of Ghana. Eleven mothers whose babies had been discharged from the neonatal intensive care unit in a major hospital and resided in Accra were interviewed in their homes using a semi-structured interview guide. Data were audiotaped, transcribed verbatim, and analyzed inductively by content analysis.

Results

All the mothers had formal education and the mean maternal age was 27.9 years. The majority of the mothers were multiparous. The gestational age at birth ranged from 32 to 34 weeks and the average birth weight of their babies was 1.61 kg. Four major themes emerged which included: Around the clock care; mothers’ self-perceptions and attitudes of significant others; mothers’ health and wellbeing; and support. Most of the mothers experienced physical exhaustion from the extra demands involved with care, had negative emotions, and unmet social needs.

Conclusions

The findings indicate that home management of preterm babies poses multiple stressors and is associated with poor psychological and physical wellbeing among mothers. Hence, the need for extensive education and identification of other social support systems to augment facility-based care for mothers and their preterm babies.

Supplementary Information

The online version contains supplementary material available at 10.1186/s12884-021-03872-9.

Prevalences and predictive factors of maternal trauma through 18 months after premature birth: A longitudinal, observational and descriptive study

Posttraumatic reactions are common among mothers of preterm infants and can have a negative influence on their quality of life and lead to interactional difficulties with their baby. Given the possible trajectories of posttraumatic reactions, we hypothesized that prevalences of postpartum posttraumatic reactions at given times underestimate the real amount of mothers experiencing these symptoms within 18 months following delivery. Additionally, we examined whether sociodemographic and clinical characteristics of dyads influence the expression of posttraumatic symptoms among these mothers. A sample of 100 dyads was included in this longitudinal study led by 3 french university hospitals. Preterm infants born before 32 weeks of gestation and their mothers were followed-up over 18 months and attended 5 visits assessing the infants’ health conditions and the mothers’ psychological state with validated scales. Fifty dyads were retained through the 18 months of the study. The period prevalence of posttraumatic reactions was calculated and a group comparison was conducted to determine their predictive factors. Thirty-six percent of the mothers currently suffered from posttraumatic symptoms 18 months after their preterm delivery. The 18 months period prevalence was 60.4% among all the mothers who participated until the end of the follow-up. There was a statistical link between posttraumatic symptoms and a shorter gestational age at delivery, C-section, and the mother’s psychological state of mind at every assessment time. Only a small proportion of mothers were receiving psychological support at 18 months. Preterm mothers are a population at risk of developing a long-lasting postpartum posttraumatic disorder, therefore immediate and delayed systematic screenings for posttraumatic symptoms are strongly recommended to guide at-risk mothers towards appropriate psychological support.

Follow-Up de Nascidos Prematuros: Uma Revisão Sistemática da Literatura

Resumo Objetivou-se mapear estudos científicos sobre follow-up de prematuros na área da psicologia. Buscou-se no portal BVS artigos empíricos publicados até dezembro de 2017 pelos descritores prematur* AND follow up AND child AND psychology. A partir dos critérios adotados, analisou-se 48 artigos, nas categorias: faixa etária em que os prematuros foram avaliados; objetivos do estudo; tipo de avaliação realizada; e resultados encontrados. Destaca-se que a metade realizou o follow-up entre o nascimento e a adolescência, a maioria investigou o desenvolvimento neuropsicológico e encontrou associações entre a prematuridade, déficits cognitivos e psicológicos. Compreende-se que os estudos priorizam as repercussões no desenvolvimento de habilidades e competências, dando pouca atenção aos aspectos psíquicos e às interações criança-pais-ambiente.

Early detection of parenting stress in mothers of preterm infants during their first-year home

Background

Maternal stress following the birth of an infant is well acknowledged. It is particularly so when infants are born prematurely as their mothers cannot fully take on their parenting role until their infant(s) is discharged from neonatal intensive care units (NICUs). In this exploratory study, we examined whether these mothers’ parenting stress would lessen during their first-year reunification with their infant(s) as they settle into motherhood at home.

Methods

Two groups of mothers with infants born between 24- and 33-week gestational age were recruited. A group of 25 mothers were monitored at their infants’ 1-month corrected age (CA) and a second group of 24 mothers were monitored at their infants’ 12-month CA. Subjects completed the long form Parental Stress Index (PSI) ranking how stressful they perceive the individual subscales in the Child and Parent Domains of the self-reported questionnaire (PSI-3; Abidin; PAR Inc). The PSI theorizes that the stress mothers perceive is a resultant of their respective characteristics, interactions with their infant(s), family, and environment. Statistical analyses include descriptive statistics, χ² square analysis, and independent t-test.

Results

There was no significant difference in the levels of perceived stress in the PSI subscales between the two groups of mothers at 1- and 12-month CA. Scores for the majority of respondents fell within the 15th to 80th percentile (% ile) distribution of Abidin’s normative population, with some mothers falling below the 15th % ile.

Discussion/conclusion

The data collected suggest that: 1. the perceived stress experienced by mothers during their first-year reunited with their preterm infants is within the normal range observed in Abidin’s normative population. 2. As the PSI is a self-reported survey, care providers need to be aware that some mothers may downplay their stress responses. 3. With the ability to monitor individual participants, the PSI can be readily offered to mothers at their infants’ first year routine clinical visits to assist in the early identification of parenting issues that may threaten the development of a healthy mother-infant dyad. Early appropriate guidance and social support would help “at-risk” mothers develop more constructive parenting routines.

Does Birth-Related Trauma Last? Prevalence and Risk Factors for Posttraumatic Stress in Mothers and Fathers of VLBW Preterm and Term Born Children 5 Years After Birth

Previous research suggests that the birth of a preterm child with very low birth weight (VLBW; <1,500 g) can be traumatic for both parents and lead to short-term consequences like clinical levels of posttraumatic stress symptoms (PTSS) or even to the development of a Posttraumatic Stress Disorder (PTSD). However, little is known about possible mid- and long-term psychological consequences in affected parents. The purpose of this study were (a) to examine the prevalence of parental birth-related PTSS and PTSD in a group of parents with VLBW preterm infants compared to parents of full-term infants 5 years after birth and (b) to investigate potential associations with risk factors for parental PTSS at 5 years postpartum. Perinatal factors (VLBW preterm or term, perceived stress during birth), psychological factors (perceived social support and PTSS 4-6 weeks postpartum, psychiatric lifetime diagnosis) and sociodemographic characteristics (number of children, singleton or multiple birth, socio-economic status), were included in the analysis. The sample consisted of 144 families (77 VLBW, 67 term birth) who participated in the prospective longitudinal cohort study "Hamburg study of VLBW and full-term infant development" (HaFEn-study) and were initially recruited at three perinatal care centers in Hamburg, Germany. PTSD prevalence and PTSS of mothers and fathers were assessed with the Impact of Event Scale-Revised (IES-R), social support with the Questionnaire of Social Support (SOZU-K-22), and lifetime psychiatric diagnoses with the Structured Clinical Interview for Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (SCID-I). Data were analyzed by hierarchic multiple regression analyses. Results showed that 5 years after birth none of the parents fulfilled the criteria for a birth-related PTSD diagnosis. For mothers, postnatal PTSS and a VLBW preterm birth significantly predicted PTSS 5 years postpartum. For fathers, psychiatric lifetime diagnosis and postnatal PTSS significantly predicted PTSS 5 years after birth. Early identification of parents with higher risk of PTSS, especially after VLBW preterm birth, and their clinical needs seems beneficial to reduce the risk of long-term consequences. More research is needed on the paternal perspective and on potential effects of preterm birth on both parents and their children's mental health outcomes.

Infant illness severity and perinatal post-traumatic stress disorder after discharge from the neonatal intensive care unit

BACKGROUND

Risk factors for perinatal posttraumatic stress disorder (PTSD) among parents of an infant in the NICU have varied in previous literature. The relationships between perception of illness severity and objective measures of illness severity with PTSD are not well understood.

AIMS

To determine if PTSD among parents after an infant NICU discharge can be predicted by 1) objective measures of infant illness severity or 2) perceptions of infant illness severity.

STUDY DESIGN

A prospective, observational study.

SUBJECTS

Parent/infant dyads who were in the NICU for ≥14 days.

OUTCOME MEASURES

Objective measures of illness severity were obtained from the electronic health record. Perceptions of illness were measured by the response to the question, "How sick is your child/patient?" on a 5-point Likert scale. The Perinatal Post-Traumatic Stress Disorder Questionnaire (PPQ) was completed by parents three months after discharge.

RESULTS

One hundred ninety-four dyads participated in the study, 86% of parents completed follow up screening. 25% of parents screened positive for PTSD. Parents perceived infants to be sick more often than hospital caregivers. In bivariate analysis many objective measures of illness severity were associated with PTSD. Parent perceptions of illness were also associated with PTSD after adjusting for objective measures of illness (OR 3.2, 95% CI 1.1-6.1, p = 0.008).

CONCLUSIONS

PTSD in parents after NICU discharge is multifactorial. Objective illness risk factors can be used to screen parents at risk. Hospital caregivers should strive to understand parents' perception of illness and improve communication to potentially decrease PTSD after discharge.

Memories of Infant Pain in the Neonatal Intensive Care Unit Influence Posttraumatic Stress Symptoms in Mothers of Infants Born Preterm

OBJECTIVES

The birth of a preterm infant and witnessing ones' infant in pain is remembered by parents as being one of the most stressful aspects of the neonatal intensive care unit (NICU). Elevated posttraumatic stress symptoms (PTSS) are highly prevalent among mothers of preterm infants, however, little is known about mothers' memories of invasive procedures in the NICU and how these memories may contribute to the development of PTSS. We examined the relationships between number of invasive procedures, mothers' memories of these procedures, and their PTSS at discharge from the NICU.

MATERIALS AND METHODS

Participants included 36 mothers of infants born below 37 weeks gestational age recruited from a tertiary-level NICU. Medical chart review was performed between birth and discharge from the NICU. At discharge, a research nurse conducted a structured memory interview with the mothers to assess their memories of their infants' invasive procedures. Mothers also completed a self-report measure of PTSS (Posttraumatic Stress Disorder Checklist for the DSM-5).

RESULTS

Mothers of infants exposed to greater numbers of invasive procedures had more elevated PTSS at discharge (R=0.37). Moreover, mothers who recalled having greater anxiety about their infant's invasive procedures had greater symptoms of reexperiencing (R=0.34) and avoidance (R=0.28) at discharge from the NICU.

DISCUSSION

Greater neonatal exposure to invasive procedures and mothers' recall of these procedures were related to mothers' posttraumatic stress symptomatology at discharge. Invasive procedures in the NICU represent an important target area for neonatal intervention to reduce maternal distress and improve outcomes.

Mother-infant interaction assessment at discharge and at 6 months in a French cohort of infants born very preterm: The OLIMPE study

Objectives

The principal aim was to investigate the feasibility of assessing mother-infant interactions at discharge and at 6 months infant corrected age in singletons born before 32 weeks of gestation. The secondary aims were to describe these interactions and their disorders, explore the association between maternal emotional state and the interactions, and assess the relationship between disordered interactions and infant social withdrawal behaviour.

Methods

OLIMPE is an ancillary study of the population-based study EPIPAGE 2, which recruited preterm neonates in France in 2011. 163 dyads participated at discharge and 148 at 6 months. Interactions were observed with the Attachment During Stress (ADS) scale, which includes two behavioural subscales, for the mother (m-ADS) and her infant (i-ADS). Two professionals independently completed the ADS scales for one third of the observations. Maternal emotional state was assessed using self-administered questionnaires of depression, anxiety, and stress. Infant’s social withdrawal behaviour at 6 months was measured by the Alarm Distress Baby scale.

Results

At discharge, 15.3% of the m-ADS scales and 43.3% of the i-ADS scales had at least one unobserved component. At 6 months, all items on both scales were noticeable in >90% of the dyads. Reliability, estimated by the kappa coefficient, ranged between 0.39 and 0.76 at discharge, and between 0.21 and 0.69 at 6 months. Disordered interactions were indicated on 48.6% of the m-ADS scales and 36.5% of the i-ADS scales at discharge. At 6 months, these rates were 32.6% and 26.0%. Disordered interactions at 6 months were associated with identified disorder at discharge. Insecure infant attachment was not influenced by maternal mental health but was strongly associated with infant social withdrawal behaviour.

Conclusions

The ADS scale can be used to screen for early interaction disorders after premature birth and may help to target dyads that would most benefit from early intervention.