Table 5.
Sleep summary: light sleep
| Device | n | PSG Mean ± SD |
Device Mean ± SD |
Bias | Lower limit | Upper limit | t (p) | Effect size | R 2 (p) |
|---|---|---|---|---|---|---|---|---|---|
| Fitbit Alta HR | 49 | 236.6 ± 28.5 | 256.7 ± 30.1 | 20.0 | –54.1 | 94.2 | 3.8 (<0.001) | 0.68 | 0.00 (0.714) |
| Garmin Fenix 5S | 29 | 238.3 ± 36.2 | 267.3 ± 35.8 | 29.0 | –74.4 | 132.4 | 3.0 (0.005) | 0.80 | 0.00 (0.957) |
| Garmin Vivosmart 3 | 43 | 238.3 ± 31.9 | 273.0 ± 36.1 | 34.7 | –60.5 | 129.8 | 4.8 (<0.001) | 1.01 | 0.02 (0.431) |
| Earlysense Live | 51 | 237.3 ± 31.0 | 215.0 ± 51.5 | –22.3 | –133.6 | 89.0 | –2.9 (0.006) | –0.52 | 0.22 (<0.001) |
| ResMed S+ | 51 | 235.9 ± 31.1 | 253.0 ± 34.3 | 17.1 | –58.5 | 92.6 | 3.2 (0.002) | 0.52 | 0.01 (0.468) |
| SleepScore Max | 42 | 236.5 ± 32.2 | 259.1 ± 38.7 | 22.7 | –51.7 | 97.0 | 4.0 (<0.001) | 0.63 | 0.04 (0.196) |
Summary results for total minutes of light sleep for the devices versus polysomnography (PSG). For PSG, light sleep was calculated as the combination of N1 and N2 sleep stages. Results are shown for all devices that output sleep stage classifications. See Table 1 caption for additional table details.