Table 1.
Definitions of each sleep variable measures using the Fatigue Science, Readiband™ actigraph.
| Sleep indices | Units | Description |
|---|---|---|
| Total Sleep Time (TST) | Minutes | Total time spent asleep |
| Sleep Efficiency (SE) | % | Total time in bed divided by total sleep time |
| Total Time in Bed (TTB) | Minutes | Total time spent in bed |
| Sleep Latency (SL) | Minutes | Time taken for sleep onset |
| Wake Episodes per Night (WE) | Number count | Total number of awakenings per night |
| Wake After Sleep Onset (WASO) | Minutes | Time spent awake after sleep onset per night |
| Sleep Onset Variance (SOV) | Minutes | Variation in sleep onset time |
| Wake Variance (WV) | Minutes | Variation in wake time |
| Sleep Onset Time (SOT) | Time of day (p.m.) | Time fell asleep at night |
| Wake Time (WT) | Time of day (a.m.) | Time woken in morning |