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Statistical characteristics calculated for the absolute values of differences between the smartwatch and sleep diary measurements for 166 overnight recordings.
| Characteristic | Mean | Median | SD | IQR | Sample Standard Error |
|---|---|---|---|---|---|
| Falling asleep time | 00:13 | 00:07 | 00:15 | 00:15 | 00:01 |
| Waking up time | 00:12 | 00:06 | 00:12 | 00:17 | 00:00 |
| Total Sleep Time | 00:35 | 00:30 | 00:23 | 00:32 | 00:01 |
| Sleep Efficiency | 7.42% | 6.77% | 3.74% | 5.09% | 0.29% |
