Table 3.
Comparison of Night-Level Metrics Derived From Device Data to Those Derived From RPSGT Staging
| Metric | Device | Mean error | MAE | RMSE | R 2 |
|---|---|---|---|---|---|
| Sleep efficiency (%) | ActiGraph Link (Cole–Kripke) | −0.99 | 4.04 | 5.47 | 0.40 |
| ActiGraph Link (Sadeh) | −4.03 | 5.25 | 7.58 | 0.35 | |
| Actiwatch Spectrum | 5.86 | 5.86 | 7.10 | 0.33 | |
| Oura Ring | 2.89 | 3.93 | 4.86 | 0.61 | |
| Sleep onset latency (min) | ActiGraph Link (Cole–Kripke) | −4.16 | 5.00 | 6.89 | 0.45 |
| ActiGraph Link (Sadeh) | −1.53 | 3.92 | 5.44 | 0.59 | |
| Actiwatch Spectrum | −7.87 | 7.87 | 10.52 | 0.13 | |
| Oura Ring | −1.46 | 5.31 | 8.86 | 0.30 | |
| WASO (min) | ActiGraph Link (Cole–Kripke) | 9.61 | 20.61 | 29.25 | 0.47 |
| ActiGraph Link (Sadeh) | 23.37 | 27.50 | 41.00 | 0.43 | |
| Actiwatch Spectrum | −23.65 | 24.13 | 30.42 | 0.44 | |
| Oura Ring | −14.10 | 20.75 | 23.67 | 0.67 | |
| Total sleep time (min) | ActiGraph Link (Cole–Kripke) | −5.45 | 21.84 | 29.68 | 0.39 |
| ActiGraph Link (Sadeh) | −21.84 | 28.39 | 41.10 | 0.34 | |
| Actiwatch Spectrum | 31.52 | 31.51 | 38.19 | 0.39 | |
| Oura Ring | 15.56 | 21.21 | 26.22 | 0.62 |
Displayed are the mean error, mean absolute error (MAE), root mean squared error (RMSE), and R2.