Measurement of Physical Activity and Sedentary Behavior by Accelerometry Among a Nationwide Sample from the KiGGS and MoMo Study: Study Protocol

Alexander Burchartz; Kristin Manz; Bastian Anedda; Claudia Niessner; Doris Oriwol; Steffen Ce Schmidt; Alexander Woll

doi:10.2196/14370

Measurement of Physical Activity and Sedentary Behavior by Accelerometry Among a Nationwide Sample from the KiGGS and MoMo Study: Study Protocol

JMIR Res Protoc. 2020 Jul 14;9(7):e14370. doi: 10.2196/14370.

Authors

Alexander Burchartz¹, Kristin Manz², Bastian Anedda¹, Claudia Niessner¹, Doris Oriwol¹, Steffen Ce Schmidt¹, Alexander Woll¹

Affiliations

¹ Institute for Sports and Sports Science, Karlsruhe Institute of Technology, Karlsruhe, Germany.
² Robert Koch Institute, Berlin, Germany.

PMID: 32459648
PMCID: PMC7388053
DOI: 10.2196/14370

Abstract

Background: Currently, no nationwide objective physical activity data exists for children and adolescents living in Germany. The German Health Interview and Examination Survey for Children and Adolescents (KiGGS) and the Motorik-Modul study (MoMo) is a national cohort study that has incorporated accelerometers in its most recent data collection wave (wave 2, since 2014). This wave 2 marks the first nationwide collection of objective data on the physical activity of children and adolescents living in Germany.

Objective: The purpose of this protocol is to describe the methods used in the KiGGS and MoMo study to capture the intensity, frequency, and duration of physical activity with accelerometers.

Methods: Participants (N=11,003, aged 6 to 31 years) were instructed to wear an ActiGraph GT3X+ or wGT3X-BT accelerometer laterally on the right hip. Accelerometers were worn on consecutive days during waking hours, including at least 4 valid weekdays and 1 weekend day (wear time >8 hours) in the evaluation. A nonwear 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 were published in 2019, and detailed analyses are ready to be submitted in 2020.

Conclusions: This study protocol provides an overview of 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.

International registered report identifier (irrid): DERR1-10.2196/14370.

Keywords: Motorik-Modul study; epoch length; intensity classification; processing criteria; sampling frequency; wear time protocol.

©Alexander Burchartz, Kristin Manz, Bastian Anedda, Claudia Niessner, Doris Oriwol, Steffen CE Schmidt, Alexander Woll. Originally published in JMIR Research Protocols (http://www.researchprotocols.org), 14.07.2020.