Table 1.
Descriptive statistics of the measured sleep characteristics for both the sleep diary and smartwatch measurements for 166 overnight recordings.
| Characteristic | Mean | Median | SD | IQR |
|---|---|---|---|---|
| Subjective measurement with sleep diary | ||||
| Falling asleep time | 00:21 | 00:19 | 00:54 | 01:07 |
| Waking up time | 07:27 | 07:29 | 01:03 | 01:24 |
| Total Sleep Time | 06:57 | 06:57 | 00:59 | 01:19 |
| Sleep Efficiency | 96.21% | 97.79% | 4.74% | 3.24% |
| Objective measurement with smartwatch | ||||
| Falling asleep time | 00:21 | 00:16 | 00:54 | 01:06 |
| Waking up time | 07:36 | 07:30 | 01:06 | 01:22 |
| Total Sleep Time | 06:33 | 06:33 | 00:56 | 01:12 |
| Sleep Efficiency | 89.72% | 90.00% | 3.43% | 4.00% |