[The associations between nighttime sleep duration, bedtime and preschool children's obesity]

Area of Science:

• Pediatrics
• Public Health
• Childhood Obesity Research

Background:

• Childhood obesity is a growing public health concern with potential long-term health consequences.
• Early life factors, including sleep patterns, are increasingly recognized as significant contributors to obesity development.
• Understanding the relationship between sleep duration, bedtime, and obesity in preschool-aged children is crucial for developing effective interventions.

Purpose of the Study:

• To investigate the association between nighttime sleep duration and bedtime with obesity in preschool children.
• To identify potential early life risk factors contributing to childhood obesity.

Main Methods:

• A cross-sectional study involving 14,946 preschool children aged 3-6 years from Ma'anshan city kindergartens.
• Obesity was determined using Chinese body mass index (BMI) cut-offs for children and adolescents (2-18 years), excluding pathological causes.
• Multivariate binary logistic regression analysis was employed to examine the associations, controlling for various demographic, lifestyle, and parental factors.

Main Results:

• Prevalence rates for overweight and obesity were 16.5% and 10.5%, respectively.
• 22.4% of children experienced shorter sleep durations, and significant percentages had late bedtimes on weekdays (9.5%) and weekends (21.8%).
• After adjusting for multiple confounding variables, shorter sleep duration remained significantly associated with an increased prevalence of obesity (OR=1.25, 95% CI: 1.03-1.51).

Conclusions:

• Shorter nighttime sleep duration is a significant risk factor positively associated with obesity in preschool children.
• These findings underscore the importance of adequate sleep for preventing childhood obesity.
• Further research into sleep interventions for young children is warranted.