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Abstract

Objectives: To describe 24-hour time-use patterns and their association with health-related quality of life (HRQoL) in early adolescence.Methods: The Child Health CheckPoint was a cross-sectional study nested between Waves 6 and 7 of the Longitudinal Study of Australian Children. The participants were 1455 11- to 12-year-olds (39% of Wave 6; 51% boys). The exposure was 24-hour time use measured across 259 activities using the Multimedia Activity Recall for Children and Adolescents. "Average" days were generated from 1 school and 1 nonschool day. Time-use clusters were derived from cluster analysis with compositional inputs. The outcomes were self-reported HRQoL (Physical and Psychosocial Health [PedsQL] summary scores; Child Health Utility 9D [CHU9D] health utility).Results: Four time-use clusters emerged: "studious actives" (22%; highest school-related time, low screen time), "techno-actives" (33%; highest physical activity, lowest school-related time), "stay home screenies" (23%; highest screen time, lowest passive transport), and "potterers" (21%; low physical activity). Linear regression models, adjusted for a priori confounders, showed that compared with the healthiest "studious actives" (mean [SD]: CHU9D 0.84 [0.14], PedsQL physical 86.8 [10.8], PedsQL psychosocial 79.9 [12.6]), HRQoL in "potterers" was 0.2 to 0.5 SDs lower (mean differences [95% confidence interval]: CHU9D -0.03 [-0.05 to -0.00], PedsQL physical -5.5 [-7.4 to -3.5], PedsQL psychosocial -5.8 [-8.0 to -3.5]).Conclusions: Discrete time-use patterns exist in Australian young adolescents. The cluster characterized by low physical activity and moderate screen time was associated with the lowest HRQoL. Whether this pattern translates into precursors of noncommunicable diseases remains to be determined.

Item Type:	Article
Authors/Creators:	Wong, M and Olds, T and Gold, L and Lycett, K and Dumuid, D and Muller, J and Mensah, FK and Burgner, D and Carlin, JB and Edwards, B and Dwyer, T and Azzopardi, P and Wake, M
Journal or Publication Title:	Pediatrics
Publisher:	Amer Acad Pediatrics
ISSN:	0031-4005
DOI / ID Number:	https://doi.org/10.1542/peds.2016-3656
Copyright Information:	Copyright © 2017 by the American Academy of Pediatrics
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