sleep latency - Search - Sleep Data - National Sleep Research Resource

REM Latency I: the interval between sleep onset and first REM (including wake) from type II polysomnography

rem_lat15 under Sleep Monitoring/Polysomnography/Sleep Architecture in MESA variables

REM Sleep Latency: the interval between the first sleep epoch and REM sleep including wake

nsrr_ttlprdsp_s1sr under Harmonized/Polysomnography/Sleep Architecture in MESA variables

Harmonized by the NSRR team. Source: :rem_lat15:

REM Sleep Latency: the interval between the first sleep epoch and REM sleep including wake from type I polysomnography

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)

Lights appropriate?

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.

Sleep Latency: the interval between lights-out/in-bed time and sleep onset from polysomnography

nsrr_ttllatsp_f1 under Harmonized/Polysomnography/Sleep Architecture in CCSHS variables

Harmonized by the NSRR team. Source: :slplatp:

How long did it take you to fall asleep at bedtime last night?

poxfall under Sleep Monitoring/Polysomnography/Evening and Morning Survey in MROS variables

Sleep Latency: the interval between lights-out/in-bed time and sleep onset from polysomnography

nsrr_ttllatsp_f1 under Harmonized/Polysomnography/Sleep Architecture in SHHS variables

Harmonized by the NSRR team. Source: :slplatp:

Sleep Latency: the interval between lights-out/in-bed time and sleep onset from polysomnography

nsrr_ttllatsp_f1 under Harmonized/Polysomnography/Sleep Architecture in APPLES variables

Harmonized by the NSRR team. Source: :soflopsg:

Sleep Latency: the interval between lights-out/in-bed time and sleep onset from polysomnography

nsrr_ttllatsp_f1 under Harmonized/Polysomnography/Sleep Architecture in CHAT variables

Harmonized by the NSRR team. Source: :slplatp:

Sleep Latency: the interval between lights-out/in-bed time and sleep onset from polysomnography

nsrr_ttllatsp_f1 under Harmonized/Polysomnography/Sleep Architecture in MESA variables

Harmonized by the NSRR team. Source: :slp_lat5:

Sleep Latency: the interval between lights-out/in-bed time and sleep onset time from polysomnography

nsrr_ttllatsp_f1 under Harmonized/Polysomnography/Sleep Architecture in SOF variables

Harmonized by the NSRR team. Source: :slplatp: at Visit 8

Was the light sensor calibrated appropriately?

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.