Definitions of sleep measures as extracted from the Readiband (Fatigue Science, Canada) device, based on Dunican et al72
| Sleep measures | Acronym | Units | Abbreviated | Measurement | Description |
| Time at Lights Out | TALO | Time of day | hh:mm | Directly measured | Time at Sleep Onset minus Sleep Onset Latency. |
| Sleep Onset Latency | SOL | Minutes | min | Derived | Number of minutes from Time at Lights Out to Time at Sleep Onset. |
| Time at Sleep Onset | TASO | Time of day | hh:mm | Directly measured | Time of day when the first epoch of sleep occurs between Time at Lights Out and Time at Wake. |
| Time at Sleep Onset Variance | TASOV | Minutes | min | Derived | Time at Sleep Onset consistency relative to mean Time at Sleep Onset. |
| Sleep Duration | SD | Minutes | min | Derived | Number of minutes from Time at Sleep Onset to Time at Wake, minus number of minutes awake (WASO). |
| Wake After Sleep Onset | WASO | Minutes | min | Directly measured | Number of minutes awake after Time at Sleep Onset. |
| Fragmentation Index | FI | Frequency | number | Directly measured | Number of awakenings between Time at Sleep Onset and Time at Wake. |
| Time at Wake | TAW | Time of day | hh:mm | Directly measured | Time of day when awake with no further Sleep Duration. |
| Time in Bed | TIB | Minutes | min | Derived | The total time spent in bed, from Time at Lights Out to Time at Wake. |
| Sleep Efficiency | SE | Percentage | % | Derived | Sleep Duration divided by Time in Bed multiplied by 100. |