Table 3.

List of accelerometer data processing criteria in KiGGS and MoMo (suggested by Migueles et al [16]).

Accelerometer data processing criterion	Definition in this study
Placement of the device	Laterally on top of the right anterior superior iliac spine
Sampling frequency	30 hertz
Filter	Normal ActiGraph GT3X filter
Epoch lengths	1 second with possibility to convert to 5, 10, 15, 30, and 60 seconds
Nonwear time definition	Choi et al 2011 [51]: 90-minute time window for consecutive zero/nonzero counts; allowance of 2-minute intervals of nonzero counts with an up/downstream 30-minute consecutive zero counts window
Valid days/valid weeks	8 hours of recording on at least four weekdays and one additional weekend day
Population age range	6-27 years (children, adolescents, and young adults)
Sedentary and physical activity intensity classification and cut point algorithmsa	6-8 years: Evenson et al 2008 [49] 9-11 years: Hängii et al 2013 [42] 12-18 years: Romanzini et al 2014 [43] Young adults: Sasaki et al 2011 [48]

^aTo be determined; definitions listed are under consideration.