TY - JOUR
T1 - Sleep duration trajectories and body composition in adolescents
T2 - Prospective Birth Cohort Study
AU - Schäfer, Antônio Augusto
AU - Domingues, Marlos Rodrigues
AU - Dahly, Darren Lawrence
AU - Meller, Fernanda Oliveira
AU - Gonçalves, Helen
AU - Wehrmeister, Fernando César
AU - Assunção, Maria Cecília Formoso
N1 - Publisher Copyright:
© 2016 Schäfer et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
PY - 2016/3
Y1 - 2016/3
N2 - We aimed to estimate the association between sleep duration trajectories and body composition in adolescents. We used data from participants of the 1993 Pelotas (Brazil) Birth Cohort Study who were later followed up at age 18 years (response rate of 81.3%). At the time, 3974 adolescents had complete data on body composition, which was assessed by air displacement plethysmography. Sleep duration was self-reported by participants at ages 11 and 18 years. Analyses were sex-stratified. The mean sleep duration at 11 years was 9.7 (SD 1.4) and 8.4 (SD 1.9) at 18 years. Sleep duration was dichotomized as inadequate (<8 hours/day) or adequate (≥8 hours/day). Mean body mass, fat mass, and fat-free mass indices at 18 years were 23.4 kg/m 2 (SD 4.5), 6.1 kg/m 2 (SD 3.9) and 17.3 kg/m 2 (SD 2.5), respectively. Girls who reported inadequate sleep duration at 11 years of age, but adequate sleep duration at 18, on average experienced an increase in body mass index (β = 0.39 zscores; 95% CI 0.13, 0.65), fat mass index (β = 0.30 z-scores; 95% CI 0.07, 0.53), and fatfree mass index (β = 0.24 z-scores; 95% CI 0.08, 0.39) compared to those who had adequate sleep duration at both time points. The results suggest that changes in sleep duration across adolescence may impact body composition in later adolescence and that this may differ by sex.
AB - We aimed to estimate the association between sleep duration trajectories and body composition in adolescents. We used data from participants of the 1993 Pelotas (Brazil) Birth Cohort Study who were later followed up at age 18 years (response rate of 81.3%). At the time, 3974 adolescents had complete data on body composition, which was assessed by air displacement plethysmography. Sleep duration was self-reported by participants at ages 11 and 18 years. Analyses were sex-stratified. The mean sleep duration at 11 years was 9.7 (SD 1.4) and 8.4 (SD 1.9) at 18 years. Sleep duration was dichotomized as inadequate (<8 hours/day) or adequate (≥8 hours/day). Mean body mass, fat mass, and fat-free mass indices at 18 years were 23.4 kg/m 2 (SD 4.5), 6.1 kg/m 2 (SD 3.9) and 17.3 kg/m 2 (SD 2.5), respectively. Girls who reported inadequate sleep duration at 11 years of age, but adequate sleep duration at 18, on average experienced an increase in body mass index (β = 0.39 zscores; 95% CI 0.13, 0.65), fat mass index (β = 0.30 z-scores; 95% CI 0.07, 0.53), and fatfree mass index (β = 0.24 z-scores; 95% CI 0.08, 0.39) compared to those who had adequate sleep duration at both time points. The results suggest that changes in sleep duration across adolescence may impact body composition in later adolescence and that this may differ by sex.
UR - https://www.scopus.com/pages/publications/84962077731
U2 - 10.1371/journal.pone.0152348
DO - 10.1371/journal.pone.0152348
M3 - Article
C2 - 27010312
AN - SCOPUS:84962077731
SN - 1932-6203
VL - 11
JO - PLOS ONE
JF - PLOS ONE
IS - 3
M1 - e0152348
ER -