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Malnutrition at age 3 years and lower cognitive ability at age 11 years: independence from psychosocial adversity

Jianghong Liu1, Adrian Raine, Peter H Venables

  • 1School of Nursing, University of California, Los Angeles.

Archives of Pediatrics & Adolescent Medicine
|June 11, 2003
PubMed

Insights

Early childhood malnutrition is linked to long-term cognitive deficits, persisting into age 11 years. Nutritional interventions in early life may improve cognitive development and academic outcomes.

Area of Science:

  • Developmental Psychology
  • Nutritional Science
  • Public Health

Background:

  • Early malnutrition is a known risk factor for impaired cognitive development.
  • Long-term cognitive sequelae of early malnutrition require further investigation.
  • Controlling for psychosocial factors is crucial in assessing malnutrition's independent effects on cognition.

Purpose of the Study:

  • To investigate the association between malnutrition at age 3 years and cognitive ability at age 11 years.
  • To determine if this association persists independently of psychosocial confounds.
  • To examine the long-term impact of early nutritional status on cognitive function.

Main Methods:

  • Prospective longitudinal study of a birth cohort (n=1559).
  • Assessment of malnutrition indicators (hemoglobin, angular stomatitis, kwashiorkor, hair quality) at age 3 years.
  • Cognitive abilities (verbal, spatial, reading, scholastic, neuropsychological) measured at ages 3 and 11 years.

Main Results:

  • Malnourished children exhibited poorer cognitive performance at both ages 3 and 11 years.
  • Cognitive deficits remained stable over time and were consistent across sex and ethnic groups.
  • Children with three malnutrition indicators showed a 15.3-point deficit in IQ at age 11, independent of psychosocial adversity.

Conclusions:

  • Early malnutrition at age 3 years is significantly associated with poorer cognitive ability at age 11 years.
  • This association is independent of psychosocial adversity, highlighting nutrition's critical role.
  • Improving early childhood nutrition is recommended to enhance long-term cognitive development and school performance.
Abstract

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