Folate and vitamin B-12 status and sleep duration in middle childhood

Area of Science:

• Nutritional Science
• Pediatric Health
• Sleep Medicine

Background:

• Insufficient sleep duration is common in middle childhood, posing significant health risks.
• The roles of folate and vitamin B-12 in children's sleep duration are understudied, particularly their interaction.
• Understanding nutrient impacts on sleep is crucial for child development and well-being.

Purpose of the Study:

• To investigate the longitudinal associations of erythrocyte folate and plasma vitamin B-12 with nighttime sleep duration in middle childhood.
• To examine the potential interaction between folate and vitamin B-12 on sleep duration.
• To provide evidence-based insights into nutritional strategies for improving sleep in children.

Main Methods:

• Longitudinal study of 1642 children in the Bogotá School Children Cohort.
• Assessment of nighttime sleep duration via parental report after a median 2-year follow-up.
• Statistical analysis using linear regression with restricted cubic splines to estimate associations and interactions.

Main Results:

• Erythrocyte folate concentration showed a non-linear positive association with nighttime sleep duration.
• Children at the 95th percentile of folate had significantly longer sleep duration compared to the median.
• A significant interaction was observed: the folate-sleep association was evident only in children with low vitamin B-12 status.

Conclusions:

• Erythrocyte folate is positively associated with nighttime sleep duration in children, particularly those with low vitamin B-12 levels.
• The findings suggest that adequate folate status, especially in conjunction with sufficient vitamin B-12, may be important for promoting sufficient sleep in children.
• Further research into nutrient-sleep interactions can inform targeted nutritional interventions for pediatric sleep health.