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Multi-Ethnic Study of Atherosclerosis

Name Label Folder
time_bed5
Total In-bed Period: the interval between lights out/in-bed time and lights off/out-bed time from type II polysomnography
Total In-bed Period: the interval between lights out/in-bed time and lights off/out-bed time from type II polysomnography

Calculated. Conventionally this variable would be called time in bed (TIB).

Sleep Monitoring/Polysomnography/Sleep Architecture
timeremp5
Percentage of total sleep duration in REM from type II polysomnography
Percentage of total sleep duration in REM from type II polysomnography

Calculated

Sleep Monitoring/Polysomnography/Sleep Architecture
times34p5
Percentage of total sleep duration in Stage 3 and 4 from type II polysomnography
Percentage of total sleep duration in Stage 3 and 4 from type II polysomnography

Calculated

Sleep Monitoring/Polysomnography/Sleep Architecture
timest1p5
Percentage of total sleep duration in Stage 1 from type II polysomnography
Percentage of total sleep duration in Stage 1 from type II polysomnography

Calculated

Sleep Monitoring/Polysomnography/Sleep Architecture
timest2p5
Percentage of total sleep duration in Stage 2 from type II polysomnography
Percentage of total sleep duration in Stage 2 from type II polysomnography

Calculated

Sleep Monitoring/Polysomnography/Sleep Architecture
waso5
Wake after Sleep Onset: the total duration between sleep onset and sleep offset time while being awake from type II polysomnography
Wake after Sleep Onset: the total duration between sleep onset and sleep offset time while being awake from type II polysomnography

Calculated

Sleep Monitoring/Polysomnography/Sleep Architecture
nsupinep5
Percentage of total sleep duration in non-supine position from type II polysomnography
Percentage of total sleep duration in non-supine position from type II polysomnography

Calculated

Sleep Monitoring/Polysomnography/Sleep Architecture
remlaiip5
REM Latency II: the interval between sleep onset and first REM while asleep (excluding wake) from type II polysomnography
REM Latency II: the interval between sleep onset and first REM while asleep (excluding wake) from type II polysomnography Sleep Monitoring/Polysomnography/Sleep Architecture
rem_lat15
REM Latency I: the interval between sleep onset and first REM from type II polysomnography
REM Latency I: the interval between sleep onset and first REM from type II polysomnography

Calculated

Sleep Monitoring/Polysomnography/Sleep Architecture
slp_eff5
Sleep Efficiency: the proportion of sleep duration in in-bed period from type II polysomnography
Sleep Efficiency: the proportion of sleep duration in in-bed period from type II polysomnography

Calculated. Sleep duration is the interval between sleep onset time and lights on/out-bed time while asleep, while in-bed period is the interval between lights off/in-bed time and lights on/out-bed time. Conventionally, this variable could be described as the ratio between total sleep time (TST) and time in bed (TIB).

Sleep Monitoring/Polysomnography/Sleep Architecture
slp_lat5
Sleep Latency: the interval between lights-out/in-bed time and sleep onset time from type II polysomnography
Sleep Latency: the interval between lights-out/in-bed time and sleep onset time from type II polysomnography Sleep Monitoring/Polysomnography/Sleep Architecture
slp_maint_eff5
Sleep Maintenance Efficiency: the proportion of sleep duration in sleep period from type II polysomnography
Sleep Maintenance Efficiency: the proportion of sleep duration in sleep period from type II polysomnography

Sleep duration (i.e. total sleep time, TST) is the interval between sleep onset and sleep offset time while asleep. Sleep period is just the interval between sleep onset and sleep offset time.

Sleep Monitoring/Polysomnography/Sleep Architecture
slpprdp5
Total Sleep Duration: the interval between sleep onset and sleep offset while the participant is asleep from type II polysomnography
Total Sleep Duration: the interval between sleep onset and sleep offset while the participant is asleep from type II polysomnography

Conventionally this variable would be called total sleep time (TST)(i.e. total time spent in stage 1 or greater).

Sleep Monitoring/Polysomnography/Sleep Architecture
stdurm5
Total Recording Period: the interval between recording start and end time from type II polysomnography
Total Recording Period: the interval between recording start and end time from type II polysomnography

Conventionally this variable would be called total recording time.

Sleep Monitoring/Polysomnography/Sleep Architecture
stendp5
Clock time when the recording (study) ends from type II polysomnography
Clock time when the recording (study) ends from type II polysomnography Sleep Monitoring/Polysomnography/Sleep Architecture
stlonp5
Clock time when the participant is out of bed or lights are on from type II polysomnography
Clock time when the participant is out of bed or lights are on from type II polysomnography

Conventionally, this variable would be called the end of time in bed (TIB).

Sleep Monitoring/Polysomnography/Sleep Architecture
stloutp5
Clock time when the participant is in bed or lights are out from type II polysomnography
Clock time when the participant is in bed or lights are out from type II polysomnography

Conventionally, this variable would be called the start of time in bed (TIB).

Sleep Monitoring/Polysomnography/Sleep Architecture
stonsetp5
Sleep onset time from type II polysomnography
Sleep onset time from type II polysomnography

Conventionally this variable would be called the start of total sleep time (TST)(i.e. total time spent in stage 1 or greater).

Sleep Monitoring/Polysomnography/Sleep Architecture
ststartp5
Clock time when the recording (study) begins from type II polysomnography
Clock time when the recording (study) begins from type II polysomnography Sleep Monitoring/Polysomnography/Sleep Architecture
supinep5
Percentage of total sleep duration in supine position from type II polysomnography
Percentage of total sleep duration in supine position from type II polysomnography

Calculated

Sleep Monitoring/Polysomnography/Sleep Architecture
timerem5
Total duration of REM sleep from type II polysomnography
Total duration of REM sleep from type II polysomnography

Calculated

Sleep Monitoring/Polysomnography/Sleep Architecture
timest15
Total duration of Stage 1 sleep from type II polysomnography
Total duration of Stage 1 sleep from type II polysomnography

Calculated

Sleep Monitoring/Polysomnography/Sleep Architecture
timest25
Total duration of Stage 2 sleep from type II polysomnography
Total duration of Stage 2 sleep from type II polysomnography

Calculated

Sleep Monitoring/Polysomnography/Sleep Architecture
timest345
Total duration of Stage 3 and 4 sleep from type II polysomnography
Total duration of Stage 3 and 4 sleep from type II polysomnography

Calculated

Sleep Monitoring/Polysomnography/Sleep Architecture