Table A1.
Comparison of the available actigraphy devices used in the studies (as of December 2021).
| Actiwatch 2 (Philips Respironics) | Actiwatch Spectrum (Philips Respironics) | Actiwatch Spectrum Plus (Philips Respironics) | Motionlogger Watch (Ambulatory Monitoring, Inc.) | ActiGraph GT9X Link (ActiGraph) | |
|---|---|---|---|---|---|
| Size (cm) | 4.3 × 2.3 × 1.0 | 4.8 × 3.7 × 1.4 | 4.8 × 3.7 × 1.5 | 4.4 × 1.8 × 1.5 | 3.5 × 3.5 × 1.0 |
| Weight (g) | 16 | 30 | 31 | 65.2 | 14 |
| Battery Life | 30 days | 8 months | 60 days | over 30 days | 14 days |
| Water Resistance | 1 m for 30 min per IPX7IEC 60529 | 1 m for 30 min per IPX7IEC 60529 | 1 m for 30 min per IPX7IEC 60529 | 50 M | IP27 1 m, 30 min |
| Wrist Detection | x | x | x | x | |
| Light Sensor | x | x | x | x | |
| Event Marker | x | x | x | x | |
| Mean Temperature | x | ||||
| PVT Reaction Time Rest | x | ||||
| Sensitivity compared to PSG a | 90.8% 1 | 95.0% 2 | - | 96.6% 3 | - |
| Specificity compared to PSG b |
65.6% 1 | 34.0% 2 | - | 65.9% 3 | - |