Table 2.
Objective 1: descriptive statistics for laboratory-validation of the ActiGraph GT3X+
| Activity (METs) | n | GT3X+ (VM activity counts/min) | Energy expenditure (METs) |
|---|---|---|---|
| Standardised testing component 1 | |||
| Lying (1.3) | 20 | 0 (0) | 0.6 (0.2) |
| Sitting (1.3) | 22 | 0 (0) | 0.7 (0.2) |
| Standing (1.3) | 18 | 141 (45) | 0.8 (0.2) |
| Activities of daily living | |||
| Reading a newspaper (1.3) | 19 | 7 (13) | 0.8 (0.2) |
| Washing and drying dishes (1.8) | 15 | 518 (315) | 1.8 (0.3) |
| Ironing and folding clothes (2.0) | 12 | 549 (279) | 1.9 (0.3) |
| Placing bed linens on pillows and duvet (2.5) | 18 | 1051 (526) | 2.3 (0.5) |
| Sweeping the floor (3.3) | 17 | 1675 (502) | 2.3 (0.6) |
| Standardised testing component 2 | |||
| Walking at 3.2 km/h (2.8) | 19 | 2148 (571) | 2.7 (0.7) |
| Walking at 4 km/h (3.0) | 20 | 3120 (637) | 3.2 (0.8) |
| Walking at 4.8 km/h (3.5) | 18 | 3944 (882) | 3.4 (0.4) |
MET values (compendium of physical activities [35]) are specified next to each activity. M (SD) are shown for GT3X+ activity counts (VM) and METs, averaged across min 4–6 of each activity. Number of participants (n) included in analysis are shown per activity
METs metabolic equivalents, VM vector magnitude