0773 Anthropometric and Polysomnogram Findings in a Pediatric Cohort of Night Eaters and Non-night Eaters

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Abstract Introduction As the prevalence of pediatric obesity increases, it is important to understand the relationship between chronotype, daytime sleepiness, eating times, sleep disorders and obesity. The objective of this study is to describe chronotype, eating timings, daytime sleepiness, and PSG findings in pediatric patients presenting for sleep evaluation and to investigate relationships between eating times on chronotype, daytime sleepiness, obesity, and PSG parameters (both respiratory and non-respiratory). Methods IRB-approved cross-sectional, survey-based study completed, between May-August, 2023 during sleep clinic visit, at Nemours Children's Hospital, Delaware. Eligibility criteria included age 11-17 years, English-speaking and developmentally appropriate. Validated surveys included: The Epworth Sleepiness Scale for Children and Adolescents (ESS-CHAD), The Morningness Eveningness Questionnaire (MEQ), and the Night Eating Diagnostic Questionnaire (NEDQ). Demographic and PSG parameters were obtained from EMR. Descriptive and comparative statistics were performed to compare surveys, PSG findings and anthropometrics between night-eaters and non-night eaters. Results Study participants (n=35) were 60% male, mean age 14.9 years (1.8). The mean BMI was 37.8 kg/m2 (9.8), mean BMI Z-score was 4.3 (3.1), 89% were obese, 63% had increased daytime sleepiness, 71% had an intermediate chronotype, and 31% were night eaters. The cohort was split into night eating and non-night eating group. Among the night eating group (n=11), mean BMI was 39.8 (5.8), BMI Z-score 3.89 (2.1), 100% were obese, 55% were abnormally sleepy, and 55% had a moderate evening chronotype. Among the non-night eating group (n=25) mean BMI was 36.9 (11.1), and mean BMI Z-score was 4.6 (3.4), 83% were obese, 67% were abnormally sleepy, and 83% had an intermediate chronotype. PSG parameters were similar in both groups except duration of N2 sleep, which was significantly higher in night eaters 60.5% (7.5) compared with non-night eaters 54.3% (9.6), p=0.05. Conclusion Night eating is associated with evening chronotype in this unexpectedly obese pediatric population. There were no observed differences in daytime sleepiness, or respiratory parameters between night eaters and non-night eaters. Further studies with a more varied BMI are necessary. Night eaters had significantly higher duration of light (N2) sleep compared to non-night eaters. Support (if any)

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