Purpose We consider the issue of summarizing accelerometer activity count data
accumulated over multiple days when the time interval in which the monitor is worn is not …

The purpose of this study was to validate individual information (II)-centered methods for
handling missing data, using data samples of 118 middle-aged adults and 91 older adults …

Quality Control and Data reduction procedures for accelerometry-derived measures of physical
activity Page 1 Article Component of Statistics Canada Catalogue no. 82-003-X Health …

Background Accelerometry is increasingly being recognized as an accurate and reliable
method to assess free-living physical activity (PA) in children and adolescents. However …

We review and discuss three statistical aspects of accelerometer-based estimates of
physical activity energy expenditure (PAEE): 1) the nature of the relationship between …

Background Longitudinal studies almost always have some individuals with missing
outcomes. Inappropriate handling of the missing data in the analysis can result in …

Background: Accelerometer use in physical activity research has become increasingly
popular but is prone to problems with missing data, which complicate the data reduction and …

Wearable accelerometers provide detailed, objective, and continuous measurements of
physical activity (PA). Recent advances in technology and the decreasing cost of wearable …

Methods In total, 1114 adults (56% women, 45+/-15 yr), randomly recruited from the
Swedish population across a year, used an accelerometer (Actigraph MTI) for seven …

Background There are many unresolved issues regarding data reduction algorithms for
accelerometry. The choice of criterion for removal of non-wear time might have a profound …