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Cleveland Children's Sleep and Health Study

Name Label Folder
pctlt90
Percentage duration of sleep with oxygen saturation < 90% from type I polysomnography
Percentage duration of sleep with oxygen saturation < 90% from type I polysomnography

Ratio of the number of minutes with oxygen saturation (SaO2) under 90% to the total sleep time expressed in hours.

Sleep Monitoring/Polysomnography/Sleep Architecture
rdi3p
Apnea-Hypopnea Index: (Apneas with >= 3% oxygen desaturation and with or without arousal + hypopneas with > 30% flow reduction and >= 3% oxygen desaturation and with or without arousal) / hour of sleep from type I polysomnography
Apnea-Hypopnea Index: (Apneas with >= 3% oxygen desaturation and with or without arousal + hypopneas with > 30% flow reduction and >= 3% oxygen desaturation and with or without arousal) / hour of sleep from type I polysomnography

[(total number of apneas and hypopneas associated with >= 3% oxygen desaturation) / (hours of sleep)]

Sleep Monitoring/Polysomnography/Sleep Architecture
slp_eff
Sleep Efficiency: the ratio of sleep duration (i.e. total sleep time) to in-bed period from type I polysomnography
Sleep Efficiency: the ratio of sleep duration (i.e. total sleep time) to in-bed period from type I polysomnography

Sleep duration is the interval between sleep onset time and lights on/out-bed time while asleep (i.e. total sleep time, TST), while in-bed period is the interval between lights off/in-bed time and lights on/out-bed time (i.e. time in bed, TIB). [100*(total sleep time) / (total time in bed)]

Sleep Monitoring/Polysomnography/Sleep Architecture
slpprdp
Total Sleep Duration: the interval between sleep onset time and lights on/out-bed time while the participant is asleep from type I polysomnography
Total Sleep Duration: the interval between sleep onset time and lights on/out-bed time while the participant is asleep from type I polysomnography

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

Total time from lights out to lights on that is scored as sleep (rounded to nearest minute)

Sleep Monitoring/Polysomnography/Sleep Architecture
waso
Wake After Sleep Onset: the total duration being awake between sleep onset and lights-on/out-bed time from type I polysomnography
Wake After Sleep Onset: the total duration being awake between sleep onset and lights-on/out-bed time from type I polysomnography Sleep Monitoring/Polysomnography/Sleep Architecture
pctlt70
Percentage duration of sleep with oxygen saturation < 70% from type I polysomnography
Percentage duration of sleep with oxygen saturation < 70% from type I polysomnography

Ratio of the number of minutes with oxygen saturation (SaO2) under 70% to the total sleep time expressed in hours.

Sleep Monitoring/Polysomnography/Sleep Architecture
pctlt75
Percentage duration of sleep with oxygen saturation < 75% from type I polysomnography
Percentage duration of sleep with oxygen saturation < 75% from type I polysomnography

Ratio of the number of minutes with oxygen saturation (SaO2) under 75% to the total sleep time expressed in hours.

Sleep Monitoring/Polysomnography/Sleep Architecture
pctlt80
Percentage duration of sleep with oxygen saturation < 80% from type I polysomnography
Percentage duration of sleep with oxygen saturation < 80% from type I polysomnography

Ratio of the number of minutes with oxygen saturation (SaO2) under 80% to the total sleep time expressed in hours.

Sleep Monitoring/Polysomnography/Sleep Architecture
pctlt85
Percentage duration of sleep with oxygen saturation < 85% from type I polysomnography
Percentage duration of sleep with oxygen saturation < 85% from type I polysomnography

Ratio of the number of minutes with oxygen saturation (SaO2) under 85% to the total sleep time expressed in hours.

Sleep Monitoring/Polysomnography/Sleep Architecture
pctlt95
Percentage duration of sleep with oxygen saturation < 95% from type I polysomnography
Percentage duration of sleep with oxygen saturation < 95% from type I polysomnography

Ratio of the number of minutes with oxygen saturation (SaO2) under 95% to the total sleep time expressed in hours.

Sleep Monitoring/Polysomnography/Sleep Architecture
remlaiip
REM Sleep Latency: the interval between the first sleep epoch and REM sleep excluding wake from type I polysomnography
REM Sleep Latency: the interval between the first sleep epoch and REM sleep excluding wake from type I polysomnography Sleep Monitoring/Polysomnography/Sleep Architecture
remlaip
REM Sleep Latency: the interval between the first sleep epoch and REM sleep including wake from type I polysomnography
REM Sleep Latency: the interval between the first sleep epoch and REM sleep including wake from type I polysomnography Sleep Monitoring/Polysomnography/Sleep Architecture
slplatp
Sleep Latency: the interval between lights-out/in-bed time and sleep onset time from type I polysomnography
Sleep Latency: the interval between lights-out/in-bed time and sleep onset time from type I polysomnography Sleep Monitoring/Polysomnography/Sleep Architecture
slp_maint_eff
Sleep Maintenance Efficiency: the proportion of sleep duration in sleep period from type I polysomnography
Sleep Maintenance Efficiency: the proportion of sleep duration in sleep period from type I polysomnography

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

Sleep Monitoring/Polysomnography/Sleep Architecture
stlonp
Clock time when the participant is out of bed or lights are on from type I polysomnography
Clock time when the participant is out of bed or lights are on from type I polysomnography

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

Sleep Monitoring/Polysomnography/Sleep Architecture
stlonp_dec
Clock time (hours of the day) when the participant is out of bed or lights are on from type I polysomnography
Clock time (hours of the day) when the participant is out of bed or lights are on from type I polysomnography

Conventionally, this variable would be called the end of time in bed (TIB). 24 hours were added to the original values that occurred after midnight

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

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

Sleep Monitoring/Polysomnography/Sleep Architecture
stloutp_dec
Clock time (hours of the day) when the participant is in bed or lights are out from type I polysomnography
Clock time (hours of the day) when the participant is in bed or lights are out from type I polysomnography

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

Sleep Monitoring/Polysomnography/Sleep Architecture
stonsetp
Sleep onset time from type I polysomnography
Sleep onset time from type I polysomnography Sleep Monitoring/Polysomnography/Sleep Architecture
stonsetp_dec
Sleep onset time (hours of the day) from type I polysomnography
Sleep onset time (hours of the day) from type I polysomnography

24 hours were added to the original values that occurred after midnight

Sleep Monitoring/Polysomnography/Sleep Architecture
timerem
Total Sleep Duration (REM): the interval between sleep onset time and lights on/out-bed time while the participant is in REM sleep from type I polysomnography
Total Sleep Duration (REM): the interval between sleep onset time and lights on/out-bed time while the participant is in REM sleep from type I polysomnography

Total time scored as rapid eye movement sleep (REM) rounded to nearest minute

Sleep Monitoring/Polysomnography/Sleep Architecture
timeremp
Percentage of REM sleep among total sleep duration from type I polysomnography
Percentage of REM sleep among total sleep duration from type I polysomnography

Conventionally, total sleep duration would be called total sleep time (TST).

[100*(number of minutes scored as REM) / (total sleep time)] * 100

Sleep Monitoring/Polysomnography/Sleep Architecture
times34p
Percentage duration of sleep in stage 3/4 sleep from type I polysomnography
Percentage duration of sleep in stage 3/4 sleep from type I polysomnography

Conventionally, total sleep duration would be called total sleep time (TST).

[100*(number of minutes scored as stage 3-4 sleep)/(total sleep time)]

Sleep Monitoring/Polysomnography/Sleep Architecture
timest1
Total duration of sleep in stage 1 sleep from type I polysomnography
Total duration of sleep in stage 1 sleep from type I polysomnography

Total time scored as stage 1 sleep rounded to nearest minute

Sleep Monitoring/Polysomnography/Sleep Architecture
timest1p
Percentage of stage 1 sleep among total sleep duration from type I polysomnography
Percentage of stage 1 sleep among total sleep duration from type I polysomnography

Conventionally, total sleep duration would be called total sleep time (TST).

[100*(number of minutes scored as stage 1 sleep)/(total sleep time)]

Sleep Monitoring/Polysomnography/Sleep Architecture
timest2
Total duration of sleep in stage 2 sleep from type I polysomnography
Total duration of sleep in stage 2 sleep from type I polysomnography

Total time scored as stage 2 sleep rounded to nearest minute

Sleep Monitoring/Polysomnography/Sleep Architecture
timest2p
Percentage of stage 2 sleep among total sleep duration from type I polysomnography
Percentage of stage 2 sleep among total sleep duration from type I polysomnography

Conventionally, total sleep duration would be called total sleep time (TST).

[100*(number of minutes scored as stage 2 sleep)/(total sleep time)]

Sleep Monitoring/Polysomnography/Sleep Architecture
timest34
Total duration of sleep in stage 3/4 sleep from type I polysomnography
Total duration of sleep in stage 3/4 sleep from type I polysomnography

Total time scored as stage 3/4 sleep rounded to nearest minute

Sleep Monitoring/Polysomnography/Sleep Architecture