The current study examined the pattern of motor development across the first 18 months of life in infants with in utero exposure to cocaine to determine how prenatal drug effects and level of exposure relates to motor development. Motor development was examined at 1, 4, 12, and 18 months of age (corrected for prematurity). Infants were divided into cocaine exposed (n=392) and comparison (n=776) groups. Exposure status was determined by meconium assay and maternal self-report with alcohol, marijuana, tobacco, and opiates present in both groups. Motor skills were assessed at 1 month using the NICU Network Neurobehavioral Scale (NNNS), at 4 months using the posture and fine motor assessment of infants (PFMAI), at 12 months using the Bayley Scales of Infant Development-Second Edition (BSID-II), and at 18 months using the Peabody Developmental Motor Scales (PDMS). Examiners masked to exposure status performed all assessments. Motor scores were converted to standard (z) scores, and hierarchical linear modeling (HLM) was used to examine the change in motor skills from 1 to 18 months of age. Infants with exposure to cocaine showed low motor skills at their initial status of 1 month but displayed significant increases over time. Both higher and lower levels of tobacco use related to poorer motor performance on average. Heavy cocaine use related to poorer motor performance as compared to no use, but there were no effects of level of cocaine use on change in motor skills.
|Number of pages||8|
|Journal||Neurotoxicology and Teratology|
|State||Published - 2005|
Bibliographical noteFunding Information:
This research was supported by National Institutes of Health cooperative agreements U10 HD 27904, U10 HD 21397, U10 HD 21385, U10 HD 27856, NICHD contract N01-HD-2-3159, and intra-agency agreements with the National Institutes on Drug Abuse (NIDA), Administration on Children, Youth, and Families (ACYF), and the Center for Substance Abuse Treatment (CSAT).
- Hierarchical linear modeling
- Motor development
- Pregnancy substance abuse
- Prenatal drug exposure
ASJC Scopus subject areas
- Developmental Neuroscience
- Cellular and Molecular Neuroscience