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Biomedical subjects

L T Singer

Publications and source records attributed to L T Singer.

25 records · Page 2Linked to original sources
PubMed1986

Selective screening device for the early detection of normal or delayed cognitive development in infants at risk for later mental retardation.

The present study tested the predictive validity at 3 years of age of a screening device for the early identification of later cognitive delay. The screening device, administered between 3 and 7 months of age, is based on the infant's differential fixation "to novel" over previously shown pictures. The sample was composed of 62 infants suspected to be at risk for later mental retardation. The prevalence of delayed cognitive development (IQ less than or equal to 70) at 3 years of age was 13%. Novelty preference scores correctly identified six of eight (75%) of the delayed children. The test identified 49 of 54 (91%) of the normal children. Validity for predicting cognitive delay was 55%. Validity for the prediction of normality was 96%. The screening device proved to be equally sensitive, specific, and valid when the sample was divided into infants born at term or born preterm. The results of the present study and of a previous study indicate that detection of cognitive delay based on early novelty preferences is as easily accomplished for infants who will later be mildly delayed (IQ scores 60 to 70) as it is for those who will later be severely delayed (IQ scores less than or equal to 50). Moreover, such results are in contrast to those obtained with conventional tests tapping sensorimotor development.

Child Development↗
PubMed1985

Developmental follow-up of long-term infant tracheostomy: a preliminary report.

In a retrospective study, medical records of a randomly selected sample of all infants less than 13 months old with tracheostomy of at least 1 month's duration were reviewed with respect to medical, demographic, and perinatal variables. Standardized outcome measures were used to document physical, cognitive, linguistic, and emotional development in a cross-sectional follow-up of all tracheostomized infants who were without primary mental retardation or neurological and physical handicap. The total sample of tracheostomized infants tended to be white, male, and premature, with moderate to severe medical illness in the perinatal period. There was a high rate of mortality and morbidity, with the majority of survivors presenting with multiple physical and mental handicaps. Follow-up of survivors without other major handicapping conditions suggested that long-term infant tracheostomy may be associated with impaired physical and emotional development, even when cognitive and language development are within normal limits. Pediatricians should be aware of the complex nature of this handicapping condition in order to coordinate appropriate interdisciplinary management.

Birth Weight↗
PubMedDate not supplied

Neurobehavioral outcomes of cocaine-exposed infants.

The present study investigated the neurobehavioral outcomes of fetal cocaine exposure. Attempts were made to control, by design or statistical analysis, for significant confounders. Timing and amount of drug exposures were considered, and biologic measures of exposure were quantified to classify exposure severity. One hundred sixty-one non-cocaine and 158 cocaine-exposed (82 heavily and 76 lightly exposed) infants were seen at a mean-corrected age of 43 weeks post-conception and administered the Neurobehavioral Assessment (NB Assessment). Heavily cocaine-exposed infants had more jitteriness and attentional problems than lightly and non-exposed infants. They also had more movement and tone abnormalities, and sensory asymmetries than non-exposed infants. Heavily exposed infants were more likely to be identified with an abnormality than non-exposed infants and there was a trend toward heavily exposed infants being more likely to be identified with an abnormality than lightly exposed infants. Furthermore, there was a trend for heavily exposed infants to be less likely to be testable than non-exposed infants. After the confounding and mediating factors were considered, heavily cocaine-exposed infants were four times as likely to be jittery and nearly twice as likely to demonstrate any abnormality than lightly and non-exposed infants, but all other effects were no longer significant. Higher concentrations of the cocaine metabolites of cocaine, cocaethylene, and benzoylecgonine (BZE) were related to higher incidence of movement and tone abnormalities, jitteriness, and presence of any abnormality. Higher cocaethylene levels were related to attentional abnormalities and higher meta-hydroxybenzoylecgonine (m-OH-BZE) was related to jitteriness. Drug effects on attention were mediated by maternal psychological distress, suggesting that this factor should be considered in future studies of drug exposure effects.

Adolescent↗
PubMedDate not supplied

Maternal employment and parent-child relationships in single-parent families of low-birth-weight preschoolers.

BACKGROUND: The influence of premature birth of an infant in female-headed, single-parent families together or in conjunction with family environment factors, such as employment of the mother, on the mother-premature child relationship has not been considered in past studies. OBJECTIVES: To explore differences in parent-child and family relationships for employed and nonemployed single mothers of low-birth-weight (LBW) and full-term preschool children and to describe the relationships of the mother's employment status, employment history, and employment attitude-behavior consistency to parent-child and family relationships. METHODS: Single mothers with LBW (n = 60) and full-term (n = 61) preschool children provided data on their employment situation, the Parenting Stress Index, the Feetham Family Functioning Survey, and the Home Observation for Measurement of the Environment. RESULTS: Employed mothers had more positive perceptions and provided more enriching home environments for their children. Greater attitude-behavior consistency was associated with more positive perceptions of the parental role. CONCLUSION: Thus, in single-parent families, employment and consistency are positive influences on the mother-child relationship.

Adaptation, Psychological↗
PubMedDate not supplied

Effects of maternal employment and prematurity on child outcomes in single parent families.

BACKGROUND: Effects of maternal employment for preschool children vary based on specific characteristics of the mother's employment, the family's economic status, and the mother's attitudes about employment. However, there is limited research on a growing group of children at developmental risk-those born prematurely and living in a single-parent family. OBJECTIVE: To examine the effects of maternal employment and prematurity on child cognition and behavior in single-parent families. METHODS: Sixty preterm and 61 full-term preschool children were recruited through NICU admission records and birth records. Data were collected with the Kaufmann Assessment Battery for Children, Peabody Picture Vocabulary Test, Child Behavior Checklist, Parenting Stress Index, and the Life History Calendar. RESULTS: Greater hours employed was related to higher achievement and mental processing scores only. Less discrepancy between actual and desired employment was related to higher achievement, mental processing, and language scores and lower behavior scores. Prematurity was not related to child cognitive and behavioral performance. Only the relationship between discrepancy and language remained after statistical control. CONCLUSIONS: The concerns about negative effects of maternal employment on young children may be overstated, especially in low-income, single-mother families. These findings are especially important in the context of welfare reform.

Achievement↗
PubMedDate not supplied

A research database for improved data management and analysis in longitudinal studies.

We developed a research database for a five-year prospective investigation of the medical, social, and developmental correlates of chronic lung disease during the first three years of life. We used the Ingres database management system and the Statit statistical software package. The database includes records containing 1300 variables each, the results of 35 psychological tests, each repeated five times (providing longitudinal data on the child, the parents, and behavioral interactions), both raw and calculated variables, and both missing and deferred values. The four-layer menu-driven user interface incorporates automatic activation of complex functions to handle data verification, missing and deferred values, static and dynamic backup, determination of calculated values, display of database status, reports, bulk data extraction, and statistical analysis.

Bronchopulmonary Dysplasia↗