TY  - JOUR
AU  - Burchartz, Alexander
AU  - Manz, Kristin
AU  - Anedda, Bastian
AU  - Niessner, Claudia
AU  - Oriwol, Doris
AU  - Schmidt, Steffen CE
AU  - Woll, Alexander
PY  - 2020
DA  - 2020/7/14
TI  - Measurement of Physical Activity and Sedentary Behavior by Accelerometry Among a Nationwide Sample from the KiGGS and MoMo Study: Study Protocol
JO  - JMIR Res Protoc
SP  - e14370
VL  - 9
IS  - 7
KW  - processing criteria
KW  - wear time protocol
KW  - epoch length
KW  - sampling frequency
KW  - intensity classification
KW  - Motorik-Modul study
AB  - 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 
SN  - 1929-0748
UR  - https://www.researchprotocols.org/2020/7/e14370
UR  - https://doi.org/10.2196/14370
UR  - http://www.ncbi.nlm.nih.gov/pubmed/32459648
DO  - 10.2196/14370
ID  - info:doi/10.2196/14370
ER  -