Diet quality and academic achievement: a prospective study among primary school children

Area of Science:

• Pediatric Nutrition
• Educational Psychology
• Public Health

Background:

• Childhood diet quality is increasingly recognized as a potential determinant of cognitive development and academic performance.
• Limited evidence exists on the specific associations between various dietary indices and academic achievement in early school years.
• This study addresses the need for research on the impact of healthy eating patterns on children's academic success.

Purpose of the Study:

• To investigate the association between healthy diet patterns in Grade 1 and academic achievement in Grades 1-3.
• To assess diet quality using the Mediterranean Diet Score (MDS), Baltic Sea Diet Score (BSDS), and Finnish Children Healthy Eating Index (FCHEI).
• To examine the relationship between these dietary indices and specific academic skills: reading fluency, reading comprehension, and arithmetic.

Main Methods:

• 161 Finnish children (aged 6-8 years) from a larger intervention study provided 4-day food records for dietary assessment.
• Dietary scores (MDS, BSDS, FCHEI) were calculated, and academic achievement was measured via standardized reading and arithmetic tests.
• Linear regression and ANCOVA were used, adjusting for covariates including age, sex, socioeconomic factors, and physical activity.

Main Results:

• Positive associations were found between BSDS and FCHEI with reading fluency and comprehension across Grades 1-3.
• The Mediterranean Diet Score (MDS) showed a positive association with reading comprehension in Grade 3.
• Children with the highest BSDS and FCHEI scores demonstrated superior reading fluency and comprehension compared to those with the lowest scores; no associations were found with arithmetic skills.

Conclusions:

• Healthy dietary patterns, specifically BSDS and FCHEI, in early childhood are associated with better reading skills in elementary school.
• Diet quality did not show a significant association with arithmetic skills in this cohort.
• Further long-term intervention studies are warranted to establish causality and explore the impact of dietary improvements on academic outcomes.