Assessing the longitudinal association between sleep, diet quality and BMIz‐score among Black adolescent girls
Authors' conclusion
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.
Study context
- Population
- Black adolescent girls; at enrolment mean age 12.2 years (±0.71), 48.3% with overweight/obesity, mean HEI 55.8 (±7.49)
- Participants
- 441 participants
- Outcome
- Mediation by diet quality (HEI-2020) of the association between sleep duration and quality (7-day accelerometry) and zBMI
- Follow-up
- T1 (enrolment), 6 months (T2) and 18 months (T3)
Methodological detailslongitudinal mediation analysis, structural equation models
- Longitudinal mediation analysis
- Structural equation models
Main finding
As reported in the abstract
T1 to T3
- Association between sleep and diet quality did not vary over time
- Sleep duration at T1 not associated with diet quality at T2, nor diet with zBMI at T3; bootstrapped indirect effect not significant
- Sleep quality at T1 not associated with diet quality at T2, nor diet with zBMI at T3; bootstrapped indirect effect not significant
Observational data: associations, not effects.
Original publication
Assessing the longitudinal association between sleep, diet quality and BMIz‐score among Black adolescent girls. Pediatr Obes. Published 11 December 2024. doi:10.
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