Language environment and parent-infant close contact in neonatal care and emerging lexical abilities of very preterm children-a longitudinal study.

AIM: This longitudinal study investigated associations between language environment and parent-infant close contact in the neonatal intensive care unit (NICU) and preterm children's lexical abilities. METHODS: NICU language environment of 43 very preterm infants (born<32 gestational weeks) was measured with the Language Environment Analysis System (LENA; variables: number of adult words, conversational turns, and child vocalisations). Parent-infant close contact (holding and skin-to-skin contact) in the NICU was reported using parental closeness diaries. At 15 and 18 months' corrected age, lexical development was measured with screening methods, and eye tracking-based lexical processing was assessed at 18 months. N varied between 29 and 38 in different outcome measures. RESULTS: LENA measured conversational turns and child vocalisations, and parent-infant close contact associated positively with lexical development (r = 0.35-0.57). High numbers of NICU adult words associated negatively with lexical processing (r = -0.38- -0.40). In regression models, conversational turns and parent-infant close contact explained 34%-35% of receptive development. CONCLUSION: Findings suggest that adult-infant turn taking and parent-infant close contact in the NICU are positively associated with lexical development. High numbers of overheard words in the NICU may not favour later lexical processing. Further research is warranted on the significance of NICU language environment on later lexical abilities.

Eye tracking based assessment of lexical processing and early lexical development in very preterm children.

BACKGROUND: Associations between lexical processing and lexical development during the second year of life have been little studied in preterm children. AIMS: To evaluate associations between lexical processing at 18 months and lexical development between 12 and 18 months in very preterm children. STUDY DESIGN: Correlational study. SUBJECTS: 25 Finnish-speaking children born <32 gestational weeks. OUTCOME MEASURES: Lexical processing (reaction time RT; correct looking time CLT) was measured with an eye tracking technology-based task at 18 months' corrected age. Lexical development was measured longitudinally at 12-, 15- and 18-months' corrected age using the following screening instruments: the short form version of the MacArthur Communicative Development Inventories and the Communication and Symbolic Behavior Scale: Infant-Toddler Checklist. RESULTS: The longer the RT of the child, the weaker expressive skills the child had at 12 and 15 months (correlations coefficient values -0.45 to -0.51). The more the child looked at the target image compared to the distractor (CLT), the stronger expressive skills the child had at 18 months (r = 0.45-0.52). A linear regression model with RT and gender as independent variables explained 33 % of the variance in lexical skills at 18 months. A model with CLT explained 40 % of expressive skills at 18 months. CONCLUSIONS: Lexical processing at 18 months was associated with expressive lexical development in very preterm children. The results suggest eye tracking technology based methods may have utility in the assessment of early lexical growth in preterm children, although further research is needed to assess psychometric properties and predictive value of the method.

The validity of the Language Environment Analysis system in two neonatal intensive care units.

AIM: To evaluate the validity of the Language Environment Analysis (LENA) system's automatic measures in two neonatal intensive care units supporting parent-infant closeness, and in two Finno-Ugric languages: Finnish and Estonian. METHODS: The sound environment of 70 very preterm infants was recorded for 16 h in the neonatal intensive care units with the LENA system roughly at the gestational age of 32 (+2) weeks. Of these, the recordings of 14 infants (20%, two 5-min samples with a high percentage of speech, totally 140 min) were analysed in detail and in two different ways. Parental closeness diaries were used to document the presence of the parents. Agreements between LENA system and human coder estimates were analysed. RESULTS: Findings showed a high variation in agreements. The highest agreements were found in female and adult word counts (r = 0.91 and 0.95). The agreements for child vocalisation count, conversational turns and silence were modest or low (r = -0.03 to 0.64). CONCLUSION: Our study provides novel information on the validity of the LENA system in the neonatal intensive care unit. Findings show that the LENA system provides valid information on adult words, but LENA estimates for child vocalisations were less valid at this early age.

Maternal and infant characteristics connected to shared pleasure in dyadic interaction.

The aim of the study was to analyze which maternal factors (depressive symptoms, effect of life events, maternal sensitivity and structuring) and infant characteristics (temperament, social withdrawal symptoms, interactive behavior, genotype, gender) contribute to shared pleasure (SP) in parent-infant interaction. Participants were 113 mother-infant dyads. The mothers filled in the Edinburgh Postnatal Depression Scale, the Infant Behavior Questionnaire, and the Life Events Questionnaire. The dyads were videotaped in a free-play situation, and the videos were analyzed using the Alarm Distress Baby Scale and the Emotional Availability Scales. The infants were genotyped for four genes involved in emotion regulation. The occurrence and duration of SP (SP-MD) in mother-infant interactions were analyzed from the videotapes. Higher maternal sensitivity and depressive symptoms, better infant responsiveness, and the infant having the GG variant of the gene tryptophan hydroxylase isoform 2 (TPH2) -307 were associated with the occurrence of SP. Lower level depressive symptoms, better maternal structuring, and greater infant involvement were associated with the longer duration of SP. Those dyads where the mother and infant were best able to read each other's positive cues and to respond to them were more likely to experience mutual positive affect, as seen in SP.

El propósito de este estudio fue analizar cuáles factores maternos (síntomas depresivos, efectos de eventos vividos, sensibilidad y estructuración maternas) y características del infante (temperamento, síntomas de despego social, comportamiento interactivo, genotipo, género sexual) contribuyen al placer compartido (SP) en la interacción progenitor-infante. En el estudio participaron 113 díadas madre-infante. Las madres completaron la Escala de Depresión Postnatal de Edimburgo, el Cuestionario de Comportamiento del Infante y el Cuestionario de Eventos de Vida. A las díadas se les grabó en video durante una sesión de juego libre y los videos se analizaron usando la Escala de Alarma de la Angustia del Bebé y las Escalas de Disponibilidad Emocional. A los infantes se les determinó el genotipo en el caso de cuatro genes que tienen que ver con la regulación emocional. Con base en las videograbaciones, se analizó la incidencia y duración de SP (SP-MD) en las interacciones madre-infante. Una más alta sensibilidad materna y síntomas depresivos, mejor sensibilidad por parte del infante, y el hecho de que el infante tenía la variante GG del gen TPH2 -307 se asociaron con la incidencia de SP. Síntomas depresivos de bajo nivel, una mejor estructuración materna y una mayor participación del infante se asociaron con una más larga duración de SP. Aquellas díadas en que la madre y el infante eran más capaces de comprender las señales positivas de cada uno y de responder a las mismas, estaban en mejor condición de experimentar un mutuo afecto positivo, como el que se ve en SP.

Le but de cette étude était d'analyser quels facteurs maternels (symptômes dépressifs, effet d'événements de la vie, sensibilité maternelle et structuration maternelle) et quelles caractéristiques du nourrisson (tempérament, symptômes de retrait social, comportement interactif, génotype, genre) contribuent au plaisir partagé (abrégé ici en français PP) dans l'interaction parent-nourrisson. Les participants ont consisté en 113 dyades mère-nourrisson. Les mères ont rempli l'Echelle de Dépression Postnatale d'Edinbourg, le Questionnaire du Comportement du Nourrisson, et le Questionnaire d'Evénements de la Vie. Les dyades ont été filmées à la vidéo pendant une situation de jeu libre et les vidéos ont été analysées en utilisant l'Echelle d'Alarme de Détresse du Bébé et les Echelles de Disponibilité Emotionnelle. Les nourrissons ont été génotypés pour quatre gènes impliqués dans la régulation de l'émotion. L'apparition et la durée du PP (en anglais SP-MD) dans les interactions mère-nourrisson ont été analysées à partir des vidéos. Une sensibilité maternelle plus élevée et des symptômes dépressifs, une meilleure réaction du nourrisson, le nourrisson ayant la variante GG du gène TPH2 -307 étaient liés à l'apparition du PP. Des niveaux plus bas de symptômes dépressifs, une meilleure structuration maternelle et un engagement plus important du nourrisson étaient liés à une durée plus longue du PP. Les dyades où la mère et le nourrisson étaient le plus capables de lire leurs signaux positifs réciproques et d'y répondre étaient moins à même de faire l'expérience d'une affect positif mutuel, comme on le voit dans le PP.

Shared pleasure in early mother-infant interaction: predicting lower levels of emotional and behavioral problems in the child and protecting against the influence of parental psychopathology.

Shared pleasure (SP) was analyzed in fifty-eight 2-month-old infants and their mothers in face-to-face interaction (T1, at 2 months). The association of SP with child's emotional and behavioral outcome at 2 years (T2) was examined. SP as a possible protecting factor in the presence of parental psychopathology also was studied. Mean duration of SP moments (SP-MD) was related to subsequent socioemotional outcome of the child: Infants of dyads with longer SP-MD showed fewer internalizing and externalizing problems 2 years later. In hierarchical linear regressions, SP-MD uniquely and significantly contributed to internalizing problems after adjusting for infant and maternal factors and mother's interactive behavior. SP protected the child against the influence of parental psychopathology. Father's mental health problems during the follow-up increased the child's risk for higher externalizing and internalizing problems, but only among children with short SP-MD at T1. Internalizing symptoms at T2 increased when moving from the category "no mental health problems" to "mental health problems in one parent" and further to "mental health problems in both parents," but this increase was found only among those with short SP-MD at T1. SP in parent-child interaction is an important feature that fosters positive psychological development and moderates the health effects of other risks such as parental psychopathology.

Early physical contact between a mother and her NICU-infant in two university hospitals in Finland.

OBJECTIVE: the first aim of this two-phase study was to describe and compare, between two university hospitals, the early physical contact of mothers and their preterm or sick newborn infants in the delivery room. Secondly, the staff's perceptions of factors facilitating and promoting or impeding this contact were evaluated. Thirdly, the association between early physical contact and the initiation of breast feeding was examined. DESIGN AND SETTING: a structured survey was conducted between November 2008 and March 2009 in two university hospitals in Finland. PARTICIPANTS: in phase I, the sample consisted of all preterm or sick infants who needed NICU care and whose questionnaires were completed by labour ward staff (hospital A, n=178/185, hospital B, n=203/235). In phase II, a subsample of these infants (A, n=76, B, n=94) and their mothers who completed their questionnaires participated in the study. MEASUREMENTS: structured questionnaires developed for this study were used. FINDINGS: the implementation of early physical contact differed between the study hospitals. The infants had physical contact with their mothers more often in hospital A than in hospital B whether they were sick full-term (83% versus 58%, p<0.001) or late preterm (49% versus 34%, p=0.051). None of the very preterm infants (<32 weeks) had early physical contact in the delivery room in either hospital. An infant's unstable condition and delivery by caesarean section were the most common obstacles against early contact. There was a moderate association between early contact and the initiation of breast feeding. KEY CONCLUSION AND IMPLICATIONS FOR PRACTICE: caring practices concerning early physical contact seemed to be different in the study hospitals. The obstacles impeding early contact should be re-evaluated. Guidelines might enhance early physical contact between preterm or sick infants and their mothers.

Fathers' postnatal depressive and anxiety symptoms: an exploration of links with paternal, maternal, infant and family factors.

BACKGROUND: Postnatal psychological symptoms have been studied less often in fathers than in mothers. However, recent research shows that fathers' psychopathology may have long-term effects on their children's emotional and behavioural development independently of maternal psychopathology. More research is needed on factors associated with paternal symptoms at the early stage of child development. AIMS: The aim of the study was to examine the paternal, maternal, infant and family factors associated with the occurrence of depressive and anxiety symptoms in fathers of infants. METHODS: As part of a study conducted in Tampere, Finland, on infants' social withdrawal symptoms, both parents of 4-, 8- and 18-month-old infants (n = 194) completed the Edinburgh Postnatal Depression Scale (EPDS) and general information questionnaires during routine check-ups of the infants in well-baby clinics. Parental depressive and anxiety symptoms were screened using the recommended cut-off points for this purpose (5/6 for fathers and 7/8 for mothers on the EPDS). The associations between the fathers' symptoms and paternal, maternal, infant and family factors were explored. RESULTS: Twenty-one per cent of the fathers and 24% of the mothers scored above the cut-off points for depressive and anxiety symptoms on the EPDS. Both paternal and maternal factors predicted high paternal symptom level in regression models. Infant factors were not statistically significantly associated with paternal symptoms. CONCLUSIONS: Father's psychological symptoms were associated with many facets of both parents' impaired well-being. The whole family system should be considered whenever there are concerns about either parent's psychological well-being.

The effects of preterm birth on mother-infant interaction and attachment during the infant's first two years.

OBJECTIVE: Early mother-infant relationships in preterm populations were evaluated in the context of a systematic review of the literature. DESIGN AND SETTING: A systematic search of three electronic databases (PsychINFO, PubMed and Cochrane Library) was undertaken. Three studies of maternal attachment, 18 studies of mother-preterm infant interaction and eight studies of infant attachment were included. Studies of preterm infant attachment were also evaluated using a meta-analysis. RESULTS: Studies of mother-preterm infant interactions showed that the differences in maternal interaction behavior between mothers of preterm infants and mothers of full-term infants seem to be most evident during the first six months of life. Differences in the preterm infant's interaction behavior seem also to continue for six months after birth. However, five of 18 studies showed an equal or even higher quality of mother-infant interaction in groups of preterm compared to groups of full-term infants. Studies of maternal and infant attachment indicated that preterm infants and their mothers are not at higher risk of insecure attachment than full-term infants and their mothers. CONCLUSIONS: The mother-preterm infant relationship is complex, and some relational patterns forecast greater psychological risk than others. It is important to decrease maternal stress and early separation in every possible way during hospitalization as well as after discharge.

Predicting internalizing and externalizing problems at five years by child and parental factors in infancy and toddlerhood.

This study examined child and parental factors in infancy and toddlerhood predicting subclinical or clinical levels of internalizing and externalizing problems at 5 years of age. Ninety-six children and their families participated. They were assessed when the children were 4-10 weeks old (T1), 2 years (T2) and 5 years old (T3). Child risks (difficult temperament, health problems, early emotional and behavioral problems), parental risks (psychopathology, parenting stress and perception of the child) and family risks (socio-economic status, quality of marital relationship and family violence) were examined. At 5 years, internalizing problems were predicted by family violence during the child's infancy and parenting stress at age 2. Externalizing problems were predicted by psychiatric problems of the mother before pregnancy and child's externalizing problems at 2 years of age. When interventions aiming at preventing emotional and behavioral problems in children are considered, these issues should be recognized early and effective intervention initiated.

How is maternal recollection of the birth experience related to the behavioral and emotional outcome of preterm infants?

OBJECTIVES: To investigate how mother's recollections of birth experiences and first contact with the newborn relate to the child's behavioral and emotional problems at five to six years of age. METHODS: The study included 28 mothers of preterm (birth weight < or =2500 g) and 39 mothers of full-term children, born in Tampere University Hospital in 1998. When the children were five to six years old, maternal recollections of the birth experiences were assessed using the Clinical Interview for Parents of High-Risk Infants (CLIP) and children's behavioral and emotional problems were assessed using the Child Behavior Checklist (CBCL). RESULTS: Mothers of the preterm children still had more negative recollections of the labor (p < 0.001) and first contact with the newborn (p < 0.001) than mothers of the full-term children. These recollections related to the child's behavioral and emotional symptoms when the child was five to six years old in the preterm group but not in the full-term group. CONCLUSION: The impact of mother's birth experience seems to have long-lasting effects on the preterm child. This finding emphasizes the importance of early physical mother-infant contact and supporting the mothers of preterm infants, especially if they articulate negative or traumatic experiences related to the birth of their child.

Visiting less than every day: a marker for later behavioral problems in Finnish preterm infants.

OBJECTIVE: To investigate the effect of parental visits during neonatal intensive care on the behavioral and emotional development of the child at school age. DESIGN: All premature infants born in Tampere University Hospital in Tampere, Finland, in 1989 who were admitted to the neonatal intensive care unit and who lived in the Tampere region (N = 67; 31 boys and 36 girls) formed the study group. Data on parental visits were collected from the hospital records. Child behavior was evaluated according to the Achenbach Child Behavior Checklist at the age of 7 to 8 years. A total of 48 (72%) of the mothers returned the questionnaires. RESULTS: The median number of visiting days per week was 6.2 for the mothers and 4.7 for the fathers. The children whose mothers visited daily had fewer behavioral and emotional problems at school age than those who had had fewer visits from their mothers (P = .04). The visiting frequency of the fathers was not significantly associated with later behavioral and emotional problems of the child. In this study, infrequent visits by the mother were a stronger risk factor for later psychological development than the medical risks of the preterm infant. CONCLUSIONS: Infrequent visits by mothers to the neonatal intensive care unit seem to be a marker for their children's later behavioral and emotional problems. This emphasizes the significance of early parent-infant contact and the vulnerability in early interaction. Less frequent visits may also indicate factors influencing the parent-child relationship in a way that leads to subsequent behavioral problems.