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Late bedtime and body mass index gain in indigenous Australian children in the longitudinal study of indigenous children
Author(s) -
Fatima Yaqoot,
Al Mamun Abdullah,
Bucks Romola S.,
Charles Skinner Timothy
Publication year - 2020
Publication title -
acta paediatrica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 115
eISSN - 1651-2227
pISSN - 0803-5253
DOI - 10.1111/apa.15219
Subject(s) - bedtime , longitudinal study , body mass index , medicine , demography , indigenous , multilevel model , cohort , cohort study , sleep (system call) , longitudinal data , gerontology , psychiatry , ecology , pathology , sociology , computer science , biology , machine learning , operating system
Aim To explore sleep patterns in indigenous Australian children and assess the role of sleep timing in longitudinal changes in body mass index (BMI). Methods Latent profile analysis was conducted with the Australian Longitudinal Study of Indigenous Children (LSIC) cohort data (wave 5), to determine distinct patterns of bed and wake timing, taking account of weekday sleep duration, weekday and weekend bedtimes, and weekday wake times. Multilevel models with a random intercept were used to investigate the role of baseline sleep pattern in predicting longitudinal changes in BMI. Results Baseline data for 1258 children (50.7% males), mean age 6.32 ± 1.52 years, indicated the presence of five classes of sleep patterns: early/long sleepers (4.5%), normative sleepers (25.5%), late sleepers (49.9%), consistent late sleepers (11.1%) and early risers (9%). Late sleeping was significantly associated with longitudinal gains in BMI. Compared with early sleepers, consistent late sleepers experienced 1.03 unit gain in BMI at follow‐up (95% CI: 0.001‐2.05, P = .05). Conclusion This study underscores the importance of looking beyond sleep duration and highlights the positive outcomes of early bedtimes in children. As sleep timing is modifiable, this offers the opportunity for improvement in sleep and protecting against future weight gain in indigenous children.