RTI uses cookies to offer you the best experience online. By clicking “accept” on this website, you opt in and you agree to the use of cookies. If you would like to know more about how RTI uses cookies and how to manage them please view our Privacy Policy here. You can “opt out” or change your mind by visiting: http://optout.aboutads.info/. Click “accept” to agree.
Assessing the longitudinal association between sleep, diet quality and BMI z-score among Black adolescent girls
Trude, A. C. B., Covington, L. B., Armstrong, B., Vedovato, G. M., & Black, M. M. (2024). Assessing the longitudinal association between sleep, diet quality and BMI z-score among Black adolescent girls. Pediatric obesity, e13189. https://doi.org/10.1111/ijpo.13189
BACKGROUND: Cross-sectional research has suggested associations between diet, sleep and obesity, with sparse longitudinal research.
OBJECTIVES: To identify longitudinal mechanistic associations between sleep, diet and obesity.
METHODS: We used longitudinal data from a sample of Black adolescent girls. At T1 (enrolment), 6 months (T2) and 18 months (T3), we estimated sleep duration and quality (7-day accelerometry), diet quality (Healthy Eating Index [HEI-2020]) and body mass z-scores (zBMI) from measured height and weight. Longitudinal mediation using structural equation models examined the mechanistic roles of sleep, diet quality and zBMI.
RESULTS: At enrolment, girls (n = 441) were mean age 12.2 years (±0.71), 48.3% had overweight/obesity, and mean HEI 55.8 (±7.49). The association between sleep and diet quality did not vary over time. Sleep duration at T1 was not associated with diet quality at T2 nor was diet associated with zBMI at T3. The bootstrapped indirect effect was not significant. Sleep quality at T1 was not associated with diet quality at T2 nor was diet associated with zBMI at T3. The bootstrapped indirect effect was not significant.
CONCLUSIONS: Diet was not a mediator between sleep and obesity. Study strengths are the longitudinal design and direct measures of sleep and zBMI among a homogeneous sample.
