Compositional data analysis for physical activity, sedentary time and sleep research
نویسندگان
چکیده
منابع مشابه
Combined Effects of Time Spent in Physical Activity, Sedentary Behaviors and Sleep on Obesity and Cardio-Metabolic Health Markers: A Novel Compositional Data Analysis Approach
The associations between time spent in sleep, sedentary behaviors (SB) and physical activity with health are usually studied without taking into account that time is finite during the day, so time spent in each of these behaviors are codependent. Therefore, little is known about the combined effect of time spent in sleep, SB and physical activity, that together constitute a composite whole, on ...
متن کاملAdiposity and the isotemporal substitution of physical activity, sedentary time and sleep among school-aged children: a compositional data analysis approach
BACKGROUND Daily activity data are by nature compositional data. Accordingly, they occupy a specific geometry with unique properties that is different to standard Euclidean geometry. This study aimed to estimate the difference in adiposity associated with isotemporal reallocation between daily activity behaviours, and to compare the findings from compositional isotemporal subsitution to those o...
متن کاملSeasonal Variation in Children’s Physical Activity and Sedentary Time
PURPOSE Understanding seasonal variation in physical activity is important for informing public health surveillance and intervention design. The aim of the current study was to describe seasonal variation in children's objectively measured physical activity and sedentary time. METHODS Data are from the UK Millennium Cohort Study. Participants were invited to wear an accelerometer for 7 d on f...
متن کاملPhysical activity intensity, sedentary time, and body composition in preschoolers.
BACKGROUND Detailed associations between physical activity (PA) subcomponents, sedentary time, and body composition in preschoolers remain unclear. OBJECTIVE We examined the magnitude of associations between objectively measured PA subcomponents and sedentary time with body composition in 4-y-old children. DESIGN We conducted a cross-sectional study in 398 preschool children recruited from ...
متن کاملLongitudinal changes in sedentary time and physical activity during adolescence
BACKGROUND Low levels of physical activity and high time spent in sedentary activities have been associated with unfavourable health outcomes in adolescents. During adolescence, physical activity declines and sedentary time increases, however little is known about whether the magnitude of these changes differs within or between school-time, after-school time, or at weekends. METHODS Adolescen...
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ژورنال
عنوان ژورنال: Statistical Methods in Medical Research
سال: 2017
ISSN: 0962-2802,1477-0334
DOI: 10.1177/0962280217710835