Table 1.
Abbreviations and definition of sleep parameters.
| Abbreviation | Definition |
|---|---|
| EUS (count) | Epochs of un-scored sleep: epochs not classified as a sleep stage, wake or artifact |
| DUR _W (min) | Stage W duration: time spend as wake |
| DUR_REM (min) | Duration of REM: time spend in REM sleep |
| DUR_NREM | Duration of NREM sleep: time spend in N1, N2, and N3 combined |
| DUR_N1 (min) | Stage 1 duration: time spent in stage N1 |
| DUR_N2 (min) | Stage 2 duration: time spent in stage N2 |
| DUR_N3 (min) | Stage 3 duration: time spent in stage N3 |
| %N1 | Percent N1: percentage amount of TST spend in stage 1 sleep |
| %N2 | Percent N2: percentage amount of TST spend in stage 2 sleep |
| %N3 | Percent N3: percentage amount of TST spend in stage 3 sleep |
| TRT (min) | Total recording time: time for which data was recorded and analyzed (note: this includes periods of sleep and quiet rest). |
| TST (min) | Total sleep time: time scored as NREM or REM excluding epochs classified as “Unsure” or “Wake” |
| SPT (min) | Sleep period time: total time scored as NREM, REM, or WAKE occurring from sleep onset to final wake |
| SE (%) | Sleep efficiency: percentage of TST against TRT |
| WASOSP (min) | Wake after sleep onset: time in minutes scored as wake from sleep onset (SOL) to final awakening. |
| SOL (min) | Sleep onset latency time in minutes from start of recording to the first epoch of NREM or REM |
| REM_L (min) | REM sleep latency, time in minutes from SOL to the first epoch of REM |
| LPS (min) | Latency to persistent sleep: time from start of recording to the first consecutive 20 epochs of NREM or REM |