Reproducibility of Accelerometer and Posture-derived Measures of Physical Activity.

ABSTRACT:

Purpose

The present study estimated the long-term reproducibility of accelerometer-based measures over 6 months in adults and the implications for statistical power, and attenuation in regression coefficients for future activity-disease studies.

Methods

We used data from 914 adults in the Interactive Diet and Activity Tracking in AARP study. Participants wore an activPAL 3 (AP) and an ActiGraph GT3X (AG) twice, 6 months apart. AP measures included time spent sitting or lying, standing, and stepping, whereas AG measures included time spent in sedentary, light, and moderate-to-vigorous physical activity (PA). Reproducibility of each metric and implications for epidemiological studies were determined based on intraclass correlation coefficients (ICC; 95% confidence interval).

SUBMITTER: Saint-Maurice PF 

PROVIDER: S-EPMC7078017 | biostudies-literature | 2020 Apr

REPOSITORIES: biostudies-literature