Infant malnutrition predicts conduct problems in adolescents.

OBJECTIVES: The purpose of this study was to compare the prevalence of conduct problems in a well-documented sample of Barbadian adolescents malnourished as infants and a demographic comparison group and to determine the extent to which cognitive impairment and environmental factors account for this association. METHODS: Behavioral symptoms were assessed using a 76-item self-report scale in 56 Barbadian youth (11-17 years of age) with histories of protein-energy malnutrition (PEM) limited to the first year of life and 60 healthy classmates. Group comparisons were carried out by longitudinal and cross-sectional multiple regression analyses at 3 time points in childhood and adolescence. RESULTS: Self-reported conduct problems were more prevalent among previously malnourished youth (P < 0.01). Childhood IQ and home environmental circumstances partially mediated the association with malnutrition. Teacher-reported classroom behaviors at earlier ages were significantly correlated with youth conduct problems, confirming the continuity of conduct problems through childhood and adolescence. DISCUSSION: Self-reported conduct problems are elevated in children and adolescents with histories of early childhood malnutrition. Later vulnerability to increased conduct problems appears to be mediated by the more proximal neurobehavioral effects of the malnutrition on cognitive function and by adverse conditions in the early home environment.

Infant malnutrition is associated with persisting attention deficits in middle adulthood.

Infantile malnutrition is known to be associated with cognitive and behavioral impairment during childhood and adolescence. Data pertaining to longer-term effects on behavioral outcomes in adulthood are limited. In this study, we report associations between infantile malnutrition and attention problems in adults at midlife. Attention problems were assessed by the Conners Adult ADHD Rating Scales (CAARS) and the Conners Continuous Performance Test (CPT) in 145 Barbadian adults (aged 37-43 y) who had been followed longitudinally since childhood. Previously malnourished participants (n = 80) had experienced moderate to severe protein-energy malnutrition in the first year of life and were successfully rehabilitated thereafter. They were compared with healthy adults (n = 65) who were former classmates of the index cases and who had been matched for age, sex, and handedness in childhood. Multiple regression analyses showed persisting effects of childhood malnutrition on both the CAARS and the CPT, independent of effects of household standard of living assessed in childhood. The malnutrition effect on the CAARS ratings was independent of IQ, whereas this effect was attenuated for the CPT after adjustment for IQ. Teacher-reported attention problems in childhood predicted attention problems in adulthood, indicating continuity over the life span. Infantile malnutrition may have long-term effects on attentional processes nearly 40 y after the episode, even with excellent long-term nutritional rehabilitation and independent of socioeconomic conditions in childhood and adolescence. This finding has major public health implications for populations exposed to early childhood malnutrition.

Early malnutrition predicts parent reports of externalizing behaviors at ages 9-17.

OBJECTIVE: To determine whether externalizing behaviors are more prevalent in youth who have experienced an episode of malnutrition in the first year of life than in healthy comparison youth. METHOD: Parents of previously malnourished youth and a matched healthy comparison group completed a behavior rating scale when the youth were 9-15 years of age and again, 2 years later, when they were 11-17 years of age. Longitudinal multiple regression analysis was applied to evaluate group differences adjusted for baseline age, sex, household standard of living, and maternal depressive symptoms. RESULTS: Early childhood malnutrition was associated with problems in executive functioning at both occasions. Malnutrition also predicted discernibly higher parent-reported levels of aggression toward peers at 9-15 years than at 11-17 years. These findings were independent of baseline age, sex, household standard of living, and maternal depressive symptoms. Problem behaviors in general decreased during follow-up. CONCLUSION: Parents report persisting problems with executive functioning through adolescence in youth who suffered an episode of moderate-to-severe protein-energy malnutrition in the first year of life, while reports of aggression, although more common when this cohort were younger, did not persist at follow-up.