Influence of prenatal cocaine exposure on early language development: longitudinal findings from four months to three years of age.
The influence of prenatal cocaine exposure on children's language functioning was evaluated longitudinally at six time points from 4 months to 3 years of age. The Miami Prenatal Cocaine Study prospectively enrolled 476 full-term African-American infants at birth, categorized as cocaine-exposed (n = 253) or non-cocaine-exposed (n = 223) by maternal self-report and bioassays (maternal/infant urine, meconium). The Bayley Scales of Infant Development, scored using the Kent Scoring Adaptation for language, was administered at 4, 8, 12, 18, and 24 months. The Clinical Evaluation of Language Fundamentals-Preschool was administered at 3 years. In longitudinal analyses using Generalized Estimating Equations, cocaine-exposed children had lower overall language skills than non-cocaine-exposed children (D = -0.151; 95% CI = -0.269, -0.033; p =.012). Longitudinal findings remained stable after evaluation of potential confounding influences including other prenatal substance exposures and sociodemographic factors. Preliminary evidence also indicated possible mediation through an intermediary effect involving cocaine-associated deficits in fetal growth.
Morrow
Connie E
CE
University of Miami School of Medicine, Department of Pediatrics, P.O. Box 016960 (M-808), Miami, FL 33101, USA. cmorrow@med.miami.edu
Bandstra
Emmalee S
ES
Anthony
James C
JC
Ofir
Audrey Y
AY
Xue
Lihua
L
Reyes
Mary B
MB
D016022:Case-Control Studies; D002675:Child, Preschool; D003042:Cocaine / Q000009:adverse effects* / Q000652:urine; D019970:Cocaine-Related Disorders / Q000150:complications*; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007805:Language Development Disorders / Q000139:chemically induced*; D007807:Language Tests; D008137:Longitudinal Studies; D008470:Meconium / Q000737:chemistry; D011247:Pregnancy; D011248:Pregnancy Complications; D011297:Prenatal Exposure Delayed Effects
D003042:Cocaine