Early childhood diarrhea predicts impaired school performance

Area of Science:

• Global Health
• Pediatrics
• Developmental Psychology

Background:

• Diarrhea is a major global cause of mortality, with poorly understood long-term effects.
• Early childhood diarrhea (ECD) is increasingly linked to impaired physical, cognitive, and academic outcomes later in life.

Purpose of the Study:

• To investigate the effects of ECD on school functioning in children from a shantytown in northeastern Brazil.
• To determine if ECD independently predicts school performance after accounting for confounding factors.

Main Methods:

• Conducted diarrhea surveillance in the first two years of life for 73 children.
• Collected demographic, anthropometric, and educational data, including age at school entry and age-appropriateness for grade (AFG).
• Utilized stepwise regression analysis to assess the impact of ECD on school functioning, controlling for socioeconomic status, maternal education, breastfeeding, growth, and cognitive function (TONI-3).

Main Results:

• ECD significantly correlated with delayed school entry (r = 0.55, P = 0.0005) and poorer age-appropriateness for grade (AFG) (r = 0.38, P = 0.001), even after controlling for confounding variables.
• These associations persisted despite ECD's correlation with impaired growth and cognitive function.
• Cognitive function, as measured by the TONI-3 nonverbal intelligence test, partially explained the link between ECD and school performance, suggesting impaired cognitive development as a key mechanism.

Conclusions:

• Early childhood diarrhea has demonstrable negative effects on later school readiness and academic performance.
• These findings indicate significant long-term human and economic costs associated with ECD.
• Greater investment in ECD prevention and management is warranted to mitigate its lasting consequences.