---
_id: '27114'
abstract:
- lang: eng
text: "Abstract\r\n Background/objectives\r\n
\ Adolescence is a critical period for both the development
of overweight and the transition toward a later chronotype, often accompanied
by an increase in social jetlag. This study assessed whether changes in chronotype
and social jetlag, are linked to changes in body composition during adolescence.\r\n
\ \r\n Subjects/methods\r\n
\ We used data from the DONALD open cohort study, collected
between 2014 and 2019, from 213 adolescents (9–17 years at baseline, 45% females)
having at least two measures of chronotype and anthropometry (N = 572).
Chronotype was assessed with the Munich Chronotype Questionnaire and defined as:
midpoint of sleep corrected for sleep-debt (MSFsc) accumulated over the week (later
MSFsc represents later chronotype). Social jetlag (SJL) defines the difference
between midpoint of sleep during week and weekend. Calculations for Fat Free Mass
Index (FFMI [kg/m2)]) and Fat Mass Index (FMI) [kg/m2)])
were based on body fat percentage, weight, and height. To analyze the associations,
we used linear mixed-effect regression models. Finally, the total cohort was split
into three biologically relevant age groups (cut-off set at <12 years, ≥12
to ≤15 years and >15 years).\r\n \r\n
\ Results\r\n Median
follow-up was 2.1 years. Overall, change toward a later chronotype was significantly
related with an increase in FMI (ß: 0.05, 95% CI: 0.01–0.08). A 1 h increase in
social jetlag predicted an increase in BMI-SDS of 0.08 SDS units (95% CI: 0.01–0.14)
and in FMI of 0.04 kg/m2 (95% CI: 0.003–0.08). Associations were stronger for
the age group ≥12 to ≤15 years (p for interaction:
<0.001). No relationship was found with FFMI.\r\n \r\n
\ Conclusions\r\n Changes
in MSFsc and SJL during adolescence were associated with concurrent changes in
BMI-SDS and FMI. The age ≥12 to ≤15 years appears to be a sensitive period in
which chronobiological changes were clearly associated with increasing body fatness.\r\n
\ "
author:
- first_name: Nicole
full_name: Jankovic, Nicole
last_name: Jankovic
- first_name: Sarah
full_name: Schmitting, Sarah
last_name: Schmitting
- first_name: Bettina
full_name: Krüger, Bettina
id: '49428'
last_name: Krüger
orcid: 0000-0001-5351-1785
- first_name: Ute
full_name: Nöthlings, Ute
last_name: Nöthlings
- first_name: Anette E.
full_name: Buyken, Anette E.
id: '65985'
last_name: Buyken
- first_name: Ute
full_name: Alexy, Ute
last_name: Alexy
citation:
ama: Jankovic N, Schmitting S, Krüger B, Nöthlings U, Buyken AE, Alexy U. Changes
in chronotype and social jetlag during adolescence and their association with
concurrent changes in BMI-SDS and body composition, in the DONALD Study. European
Journal of Clinical Nutrition. Published online 2021. doi:10.1038/s41430-021-01024-y
apa: Jankovic, N., Schmitting, S., Krüger, B., Nöthlings, U., Buyken, A. E., &
Alexy, U. (2021). Changes in chronotype and social jetlag during adolescence and
their association with concurrent changes in BMI-SDS and body composition, in
the DONALD Study. European Journal of Clinical Nutrition. https://doi.org/10.1038/s41430-021-01024-y
bibtex: '@article{Jankovic_Schmitting_Krüger_Nöthlings_Buyken_Alexy_2021, title={Changes
in chronotype and social jetlag during adolescence and their association with
concurrent changes in BMI-SDS and body composition, in the DONALD Study}, DOI={10.1038/s41430-021-01024-y},
journal={European Journal of Clinical Nutrition}, author={Jankovic, Nicole and
Schmitting, Sarah and Krüger, Bettina and Nöthlings, Ute and Buyken, Anette E.
and Alexy, Ute}, year={2021} }'
chicago: Jankovic, Nicole, Sarah Schmitting, Bettina Krüger, Ute Nöthlings, Anette
E. Buyken, and Ute Alexy. “Changes in Chronotype and Social Jetlag during Adolescence
and Their Association with Concurrent Changes in BMI-SDS and Body Composition,
in the DONALD Study.” European Journal of Clinical Nutrition, 2021. https://doi.org/10.1038/s41430-021-01024-y.
ieee: 'N. Jankovic, S. Schmitting, B. Krüger, U. Nöthlings, A. E. Buyken, and U.
Alexy, “Changes in chronotype and social jetlag during adolescence and their association
with concurrent changes in BMI-SDS and body composition, in the DONALD Study,”
European Journal of Clinical Nutrition, 2021, doi: 10.1038/s41430-021-01024-y.'
mla: Jankovic, Nicole, et al. “Changes in Chronotype and Social Jetlag during Adolescence
and Their Association with Concurrent Changes in BMI-SDS and Body Composition,
in the DONALD Study.” European Journal of Clinical Nutrition, 2021, doi:10.1038/s41430-021-01024-y.
short: N. Jankovic, S. Schmitting, B. Krüger, U. Nöthlings, A.E. Buyken, U. Alexy,
European Journal of Clinical Nutrition (2021).
date_created: 2021-11-03T12:57:29Z
date_updated: 2022-01-06T06:57:35Z
department:
- _id: '35'
- _id: '22'
- _id: '571'
doi: 10.1038/s41430-021-01024-y
language:
- iso: eng
publication: European Journal of Clinical Nutrition
publication_identifier:
issn:
- 0954-3007
- 1476-5640
publication_status: published
status: public
title: Changes in chronotype and social jetlag during adolescence and their association
with concurrent changes in BMI-SDS and body composition, in the DONALD Study
type: journal_article
user_id: '49428'
year: '2021'
...