Table 9.
Bias and limits of agreement between device- and PSG-measured deep sleep.
| Device (min) |
PSG (min) |
Bias | LOA | ICC | |
|---|---|---|---|---|---|
| Inspire | 81.5 (52.3) | 117.7 (30.4) | 99.9 + −1.16 × ref | 1.10 | 0.00 (−0.21–0.24) |
| Versa | 92.2 (56.3) | 117.2 (30.8) | 109.3 + −1.14 × ref | 0.96 | 0.00 (−0.28–0.29) |
| Vivosmart | 120.3(110) | 117.9 (30.3) | 2.3 (108.2) | 1.99 | 0.14 (−0.15–0.40) |
| Oura Ring | 142.5(40.5) | 118.5 (30.9) | 94.9 + −0.6 × ref | 0.67 | 0.29 (0.01–0.53) |
| Withings | 122.8(48.1) | 121.1 (30.2) | 1.7 (48.6) | 0.93 | 0.31 (0.01–0.56) |
Bias = absolute bias and standard deviation. LOA = limits of agreement (Bias ± ref × value), ICC = intraclass correlation coefficient and 95% confidence intervals.