Drug and alcohol dependence · 2026
Longitudinal pathways from prenatal alcohol exposure and infant behaviors to verbal IQ and working memory.
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Singer Lynn T, Schultheis Elizabeth, Albert Jeffrey M, Kim June-Yung, Minnes Sonia, Min Meeyoung O
Аннотация
OBJECTIVE: Assess infant behaviors as early predictors of Verbal IQ and Working Memory (V/WM) differences related to prenatal alcohol exposure (PAE) from 4 to 21 years of age.
STUDY DESIGN: Longitudinal observational study of 387 infants (60% PAE; 48% male; 81% Black), from birth to 21 years. Verbal IQ or Working Memory was measured at 4, 9, 15, or 21yrs. with tests of intellectual functioning. Infants were administered a visual preference task and the Neurobehavioral Assessment (NB) at birth, the Fagan Test of Infant Intelligence (FTII) at 6.5 /12 mo. and Mental Development Index (MDI) of the Bayley Scales at 6.5, 12, 24 mos. Latent growth curve modeling assessed the association of PAE with V/WM over time, assessing infant behaviors as predictors.
RESULTS: 2-year Bayley MDI (Indirect effect (IE) = -0.11, SE = 0.045; p = 0.015) was linked to both PAE and V/WM. Abnormal NB correlated with V/WM (β = -0.21, p = 0.023; β = 0.23, p = 0.047, for intercept and slope, respectively). FTII at 6.5 months correlated with MDI (β = 0.16, p = 0.007) and FTII at 1 year (β=0.17, p = 0.005). Neonatal visual preference marginally correlated with FTII at 6.5 months (β = -0.13, p = 0.097). All relationships were controlled for other prenatal exposures, the home environment, and blood lead level.
CONCLUSIONS: PAE was related to poorer Verbal IQ and WM from 4 to 21 years of age, via 2-year cognitive outcomes associated with 6- and 12-month infant mental and visual recognition performance. Neonatal neurobehavioral abnormalities were related to V/WM independent of PAE. Infant assessments could aid early identification of cognitive sequelae of PAE in high-risk populations.
STUDY DESIGN: Longitudinal observational study of 387 infants (60% PAE; 48% male; 81% Black), from birth to 21 years. Verbal IQ or Working Memory was measured at 4, 9, 15, or 21yrs. with tests of intellectual functioning. Infants were administered a visual preference task and the Neurobehavioral Assessment (NB) at birth, the Fagan Test of Infant Intelligence (FTII) at 6.5 /12 mo. and Mental Development Index (MDI) of the Bayley Scales at 6.5, 12, 24 mos. Latent growth curve modeling assessed the association of PAE with V/WM over time, assessing infant behaviors as predictors.
RESULTS: 2-year Bayley MDI (Indirect effect (IE) = -0.11, SE = 0.045; p = 0.015) was linked to both PAE and V/WM. Abnormal NB correlated with V/WM (β = -0.21, p = 0.023; β = 0.23, p = 0.047, for intercept and slope, respectively). FTII at 6.5 months correlated with MDI (β = 0.16, p = 0.007) and FTII at 1 year (β=0.17, p = 0.005). Neonatal visual preference marginally correlated with FTII at 6.5 months (β = -0.13, p = 0.097). All relationships were controlled for other prenatal exposures, the home environment, and blood lead level.
CONCLUSIONS: PAE was related to poorer Verbal IQ and WM from 4 to 21 years of age, via 2-year cognitive outcomes associated with 6- and 12-month infant mental and visual recognition performance. Neonatal neurobehavioral abnormalities were related to V/WM independent of PAE. Infant assessments could aid early identification of cognitive sequelae of PAE in high-risk populations.