Modeling daily and weekly moderate and vigorous physical activity using zero-inflated mixture Poisson distribution.

ABSTRACT: Recently developed accelerometer devices have been used in large epidemiological studies for continuous and objective monitoring of physical activities. Typically, physical movements are summarized as minutes in light, moderate, and vigorous physical activities in each wearing day. Because of preponderance of zeros, zero-inflated distributions have been used for modeling the daily moderate or higher levels of physical activity. Yet, these models do not fully account for variations in daily physical activity and cannot be extended to model weekly physical activity explicitly, while the weekly physical activity is considered as an indicator for a subject's average level of physical activity. To overcome these limitations, we propose to use a zero-inflated Poisson mixture distribution that ca

SUBMITTER: Xue X 

PROVIDER: S-EPMC8521567 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature