Abstract MP72: Habitual Sleep Variability is Associated with Caloric and Food Intake
Introduction: Excessive food intake is the primary factor for obesity in adolescents whereas subjectively reported sleep duration has been suggested as a novel risk factor. However, the association between objectively measured habitual sleep pattern and adolescent caloric and snack consumption behaviors has not been assessed.
Hypothesis: We assessed the hypothesis that objectively-measured habitual sleep variability is associated with caloric and snack intakes in adolescents.
Methods: We used data from 421 adolescents who participated in the population-based Penn State Child Cohort follow-up examination. Actigraphy was used for 7 consecutive nights to calculate each participant’s mean sleep duration as habitual sleep duration (HSD) and the standard deviation of the mean as habitual sleep variability (HSV). Participants’ caloric and snack intakes for one year prior to the clinical examination were assessed using Youth/Adolescent Food Frequency Questionnaire. Daily total caloric intake (kcal), protein intake (g), total fat intake (g), carbohydrates intake (g), and the number of snacks consumed were obtained and analyzed. Linear regression and proportional odds models were used to assess the relationship between habitual sleep pattern and total caloric, protein, fat, and carbohydrate intakes, and number of snacks consumed, respectively.
Results: The mean age of the study sample was 17 (SD=2.3) years. There are 52% male and 79% white in the study sample. After adjusting for age, gender, race, BMI percentile and HSD, 1-hour increase in HSV is associated with 201 kcal higher total caloric intake (β=201, SE=65, p<0.01), 6 grams of total fat intake (β=6.4, SE=2.50, p=0.01), and 32 grams of carbohydrates intake (β=32, SE=8.79, p<0.01). One-hour higher HSV was also associated with higher odds of consuming more snacks, especially after dinner. Specifically, one-hour increase in HSV is associated with 60% higher odds of consuming more snacks after-dinner (OR=1.60, 95% CI: 1.07-2.38, p=0.02) during school days. One-hour increase in HSV is associated with 100% higher odds of consuming more snacks after dinner during the weekend (OR=2.04, 95% CI: 1.38-3.02, p<0.01). Higher HSV was also associated with daytime snack consumption during weekends/vacation days as well. HSD was not related to caloric or snack intakes.
Conclusion: In adolescents, higher habitual sleep duration variability, but NOT habitual sleep duration, is associated with higher caloric and snack food consumption, especially calories from fat and carbohydrate-dense food, such as snacks.
Author Disclosures: F. He: None. E.O. Bixler: None. J. Liao: None. A. Berg: None. Y. Imamura Kawasawa: None. J. Fernandez-Mendoza: None. A.N. Vgontzas: None. D. Liao: None.
- © 2015 by American Heart Association, Inc.