Table 2 Expanded list of accelerometer criteria used in KiGGS and MoMo, modified from [14]
From: Comparison of self-reported & device-based, measured physical activity among children in Germany
Criteria | Definitions within this study |
|---|---|
Accelerometer devices | ActiGraph (models: GT3X+, wGT3X-BT) |
Placement of the device | Laterally on top of the right anterior superior iliac spine |
Sampling frequency | 30 Hz |
Filter | Normal ActiGraph GT3X filter |
Epoch lengths | 1 s with possibility to convert into 5 s, 10s, 15 s, 30s and 60s |
Nonwear time definition | [24]: 90-min time window for consecutive zero/nonzero counts; allowance of 2-min interval of nonzero counts with a up/downstream 30-min consecutive zero counts window |
Valid days/valid weeks | 8 h of recordings on four weekdays and one further weekend day when wearing the device for 7 days |
Population age range | Children, adolescents and young adults from 6 to 17 years |
Sedentary and physical activity intensity classification and cut point algorithms | 6–10 years: [25] 11–17 years: [26] |