Accepted for/Published in: JMIR Research Protocols
Date Submitted: Apr 12, 2019
Date Accepted: Feb 3, 2020
Date Submitted to PubMed: May 27, 2020
Measurement of physical activity and sedentary behavior by accelerometry among a nationwide sample of the KiGGS and MoMo study: a study protocol
ABSTRACT
Background:
To date no nationwide objective physical activity (PA) data exists for children and adolescents living in Germany. The KiGGS and MoMo-Study is a national cohort study and has in its most recent data collection wave (wave 2 since 2014) incorporated accelerometers. This wave 2 marks the first nationwide collection of objective data on PA of children and adolescents living in Germany.
Objective:
The purpose of this study protocol is to describe the methods used to capture intensity, frequency and duration of PA with accelerometers in this study.
Methods:
Participants (n=11,003; aged 6-31yrs) are instructed to wear an ActiGraph GT3X+/wGT3X-BT laterally on the right hip. Accelerometers are worn on consecutive days during waking hours to include at least four valid weekdays and one weekend day (weartime >8h) in the evaluation. A non-wear-time protocol was also implemented.
Results:
Data collection was completed by October 2017. Data harmonization took place in 2018. The first accelerometer results from this wave are anticipated to be published in 2019.
Conclusions:
This study protocol provides an overview of the technical details and basic choices when using accelerometers in large-scale epidemiological studies. At the same time the restrictions imposed by the specified filters and the evaluation routines must be taken into account.
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