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remlaip
under
Sleep Monitoring/Polysomnography/Sleep Architecture
in
CHAT variables
Total time from beginning of sleep to first epoch of rapid eye movement sleep (REM) (data can be inaccurate if scorer has not set sleep onset rule properly in compumedics software)
lightoff
under
Sleep Monitoring/Polysomnography/Signal Quality/SHHS1
in
SHHS variables
Sleep Heart Health Study Visit 1 (SHHS1)- 0= Appropriate/1= Not Appropriate. Note that the indication of lights being appropriate or not appropriate relates only to whether the light signal was working and does NOT infer anything about sleep latency or sleep onset variables.
ligh
under
Sleep Monitoring/Polysomnography/Signal Quality/SHHS2
in
SHHS variables
Sleep Heart Health Study Visit 2 (SHHS2)- Lights are considered to have been calibrated appropriately if, at any time during the study, there is a clear transition (on recorded lights) from lights on to lights off. Otherwise, lights are considered not appropriate (including a light channel showing: no change throughout the study, reversed calibration and/or constant fluctuation from on to off throughout the study.) On studies with clear, but multiple, light transitions "lights off" will be marked at the first "off" transition that is maintained for at least 30 minutes. Light calibration will be considered reliable, but sleep latency will be unreliable. This method will be employed for all studies with the only exception being when onset of sleep occurs prior to the light change, in which "lights off" will be set at the onset of sleep.