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Cleveland Children's Sleep and Health Study

Name Label Folder
bp2hr2
Heart rate (Morning) time 2
Heart rate (Morning) time 2

Second measurement of heart rate in morning

Clinical Data/Vital Signs/Seated Blood Pressure
bp2hr3
Heart rate (Morning) time 3
Heart rate (Morning) time 3

Third measurement of heart rate in morning

Clinical Data/Vital Signs/Seated Blood Pressure
bp2sys1
Systolic blood pressure (SBP) (Morning) time 1
Systolic blood pressure (SBP) (Morning) time 1

First measurement of systolic blood pressure (SBP) in morning

Clinical Data/Vital Signs/Seated Blood Pressure
bp2sys2
Systolic blood pressure (SBP) (Morning) time 2
Systolic blood pressure (SBP) (Morning) time 2

Second measurement of systolic blood pressure (SBP) in morning

Clinical Data/Vital Signs/Seated Blood Pressure
bp2sys3
Systolic blood pressure (SBP) (Morning) time 3
Systolic blood pressure (SBP) (Morning) time 3

Third measurement of systolic blood pressure (SBP) in morning

Clinical Data/Vital Signs/Seated Blood Pressure
bp2time
Time of Morning collection
Time of Morning collection

Time of morning blood pressure (BP) collection

Clinical Data/Vital Signs/Seated Blood Pressure
missbpdias
Number of missing diastolic measurements
Number of missing diastolic measurements

Blood pressure (BP) is collected six times, three measurements in the evening and three in the morning. This is the number of time points missing diastolic blood pressure (DBP).

Clinical Data/Vital Signs/Seated Blood Pressure
missbphr
Number of missing heart rate measurements
Number of missing heart rate measurements

Blood pressure (BP) is collected six times, three measurements in the evening and three in the morning. This is the number of time points missing heart rate.

Clinical Data/Vital Signs/Seated Blood Pressure
missbpsys
Number of missing systolic measurements
Number of missing systolic measurements

Blood pressure (BP) is collected six times, three measurements in the evening and three in the morning. This is the number of time points missing systolic blood pressure (SBP).

Clinical Data/Vital Signs/Seated Blood Pressure
race3
Race
Race

Race was collapsed into these three categories to match other National Sleep Research Resource (NSRR) datasets

Demographics
ystatus
Rate socioeconomic standing based on ladder
Rate socioeconomic standing based on ladder Demographics/Socioeconomic Status
yacaer
Other aerobic exercise
Other aerobic exercise

Calculated as self-report of the number of minutes of activity per day times self report of the number of days per week in that activity

Lifestyle and Behavioral Health
yacarm
Weight training (Arm)
Weight training (Arm)

Calculated as self-report of the number of minutes of activity per day times self report of the number of days per week in that activity

Lifestyle and Behavioral Health
yacbike
Bicycling
Bicycling

Calculated as self-report of the number of minutes of activity per day times self report of the number of days per week in that activity

Lifestyle and Behavioral Health
yacjog
Jogging
Jogging

Calculated as self-report of the number of minutes of activity per day times self report of the number of days per week in that activity

Lifestyle and Behavioral Health
yacleg
Weight training (Leg)
Weight training (Leg)

Calculated as self-report of the number of minutes of activity per day times self report of the number of days per week in that activity

Lifestyle and Behavioral Health
yacloin
Lower intensity exercise
Lower intensity exercise

Calculated as self-report of the number of minutes of activity per day times self report of the number of days per week in that activity

Lifestyle and Behavioral Health
yacother
Other activity
Other activity

Calculated as self-report of the number of minutes of activity per day times self report of the number of days per week in that activity

Lifestyle and Behavioral Health
yacrun
Running
Running

Calculated as self-report of the number of minutes of activity per day times self report of the number of days per week in that activity

Lifestyle and Behavioral Health
yacswim
Swimming
Swimming

Calculated as self-report of the number of minutes of activity per day times self report of the number of days per week in that activity

Lifestyle and Behavioral Health
yacten
Tennis
Tennis

Calculated as self-report of the number of minutes of activity per day times self report of the number of days per week in that activity

Lifestyle and Behavioral Health
yacvig
Other vigorous activities
Other vigorous activities

Calculated as self-report of the number of minutes of activity per day times self report of the number of days per week in that activity

Lifestyle and Behavioral Health
yacwlk
Walking for exercise
Walking for exercise

Calculated as self-report of the number of minutes of activity per day times self report of the number of days per week in that activity

Lifestyle and Behavioral Health
ycursmk
Currently smoke regularly
Currently smoke regularly Lifestyle and Behavioral Health
yevrsmk
Ever smoked cigarettes, cigars or pipe
Ever smoked cigarettes, cigars or pipe Lifestyle and Behavioral Health
yevrsmkno
Average cigarettes consumption
Average cigarettes consumption

On average, over the entire time you smoked, how many cigarettes / cigars / bowls did you smoke each day?

Lifestyle and Behavioral Health
yevrsmkstaa
Age when started smoking regularly
Age when started smoking regularly Lifestyle and Behavioral Health
yevrsmkstpa
Age when stopped smoking regularly
Age when stopped smoking regularly Lifestyle and Behavioral Health
mnmeal
Mean number of meals per day
Mean number of meals per day Lifestyle and Behavioral Health/Diet
mnsnack
Mean number of snacks per day
Mean number of snacks per day Lifestyle and Behavioral Health/Diet
mrifat
Mean total fat per day
Mean total fat per day Lifestyle and Behavioral Health/Diet
mrigrams
Mean total grams per day
Mean total grams per day Lifestyle and Behavioral Health/Diet
mrikcal
Mean energy per day
Mean energy per day Lifestyle and Behavioral Health/Diet
mripro
Mean total protein per day
Mean total protein per day Lifestyle and Behavioral Health/Diet
mritcho
Mean total carbohydrate per day
Mean total carbohydrate per day Lifestyle and Behavioral Health/Diet
msnackfat
Mean fat from snacks per day
Mean fat from snacks per day Lifestyle and Behavioral Health/Diet
msnackgrams
Mean grams from snacks per day
Mean grams from snacks per day Lifestyle and Behavioral Health/Diet
msnackkcal
Mean kilocalories from snacks per day
Mean kilocalories from snacks per day Lifestyle and Behavioral Health/Diet
msnackpro
Mean protein from snacks per day
Mean protein from snacks per day Lifestyle and Behavioral Health/Diet
msnacktcho
Mean carbohydrates from snacks per day
Mean carbohydrates from snacks per day Lifestyle and Behavioral Health/Diet
nutndays
Number days of nutrition recall data
Number days of nutrition recall data Lifestyle and Behavioral Health/Diet
ycanc
Medical history: Had cancer
Medical history: Had cancer Medical History
ydep
Medical history: Had depression
Medical history: Had depression Medical History
ydiab
Medical history: Had diabetes
Medical history: Had diabetes Medical History
yhtn
Medical history: Had hypertension
Medical history: Had hypertension Medical History
cslp
Coefficient of variation of daily total sleep duration in main sleep in all days from actigraphy
Coefficient of variation of daily total sleep duration in main sleep in all days from actigraphy Sleep Monitoring/Actigraphy
cslpend
Coefficient of variation of daily total sleep duration in main sleep on weekdays from actigraphy
Coefficient of variation of daily total sleep duration in main sleep on weekdays from actigraphy Sleep Monitoring/Actigraphy
cslpwk
Coefficient of variation of daily total sleep duration in main sleep on weekends from actigraphy
Coefficient of variation of daily total sleep duration in main sleep on weekends from actigraphy Sleep Monitoring/Actigraphy
mseff
Average daily sleep efficiency in all days from actigraphy
Average daily sleep efficiency in all days from actigraphy

Sleep efficiency is the proportion of sleep duration (i.e. total sleep time, tst) in total rest period (i.e. rest interval) in main sleep. Sleep duration is the interval between sleep onset time and sleep offset time while asleep. In this study, rest interval is the same as in-bed period.

Sleep Monitoring/Actigraphy
mseffend
Average daily sleep efficiency on weekends from actigraphy
Average daily sleep efficiency on weekends from actigraphy

Sleep efficiency is the proportion of sleep duration (i.e. total sleep time, tst) in total rest period (i.e. rest interval) in main sleep. Sleep duration is the interval between sleep onset time and sleep offset time while asleep. In this study, rest interval is the same as in-bed period.

Sleep Monitoring/Actigraphy
mseffwk
Average daily sleep efficiency on weekdays from actigraphy
Average daily sleep efficiency on weekdays from actigraphy

Sleep efficiency is the proportion of sleep duration (i.e. total sleep time, tst) in total rest period (i.e. rest interval) in main sleep. Sleep duration is the interval between sleep onset time and sleep offset time while asleep. In this study, rest interval is the same as in-bed period.

Sleep Monitoring/Actigraphy
mslp
Average daily total sleep duration in main sleep in all days from actigraphy
Average daily total sleep duration in main sleep in all days from actigraphy

Conventionally this variable would be called total sleep time (TST).

Sleep Monitoring/Actigraphy
mslpend
Average daily total sleep duration in main sleep on weekends from actigraphy
Average daily total sleep duration in main sleep on weekends from actigraphy

Conventionally this variable would be called total sleep time (TST).

Sleep Monitoring/Actigraphy
mslpwk
Average daily total sleep duration in main sleep on weekdays from actigraphy
Average daily total sleep duration in main sleep on weekdays from actigraphy

Conventionally this variable would be called total sleep time (TST).

Sleep Monitoring/Actigraphy
nslp
Total number of nights with sleep data in the entire actigraphy recording period in all days from actigraphy
Total number of nights with sleep data in the entire actigraphy recording period in all days from actigraphy Sleep Monitoring/Actigraphy
nslpend
Total number of weekend nights with sleep data in the entire actigraphy recording period in all days from actigraphy
Total number of weekend nights with sleep data in the entire actigraphy recording period in all days from actigraphy Sleep Monitoring/Actigraphy
nslpwk
Total number of weekday nights with sleep data in the entire actigraphy recording period in all days from actigraphy
Total number of weekday nights with sleep data in the entire actigraphy recording period in all days from actigraphy Sleep Monitoring/Actigraphy
oahi3
Obstructive Apnea Hypopnea Index: (Obstructive apneas with no oxygen desaturation threshold used 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
Obstructive Apnea Hypopnea Index: (Obstructive apneas with no oxygen desaturation threshold used 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

Ratio of the count of all obstructive apneas (all desaturations) plus the count of hypopneas associated with at least a >=3% oxygen desaturation to the total sleep time expressed in hours.

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
oai0p
Obstructive Apnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal) / hour of sleep from type I polysomnography
Obstructive Apnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal) / hour of sleep from type I polysomnography

Obstructive Apnea Index at all desaturations [(Total number of obstructive apneas associated with all desaturations) / (hours of sleep)]

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
avgplm
Number of periodic limb movements per hour of sleep from type I polysomnography
Number of periodic limb movements per hour of sleep from type I polysomnography Sleep Monitoring/Polysomnography/Limb Movements
avgplma
Number of periodic limb movements with arousal per hour of sleep from type I polysomnography
Number of periodic limb movements with arousal per hour of sleep from type I polysomnography Sleep Monitoring/Polysomnography/Limb Movements
minsat
Minimum oxygen saturation during total sleep duration from type I polysomnography
Minimum oxygen saturation during total sleep duration from type I polysomnography

Lowest oxygen saturation (SaO2)% during sleep

Sleep Monitoring/Polysomnography/Oxygen Saturation
canbp
Total number of central apnea in NREM sleep in supine position: Central apneas with no oxygen desaturation threshold used and with or without arousal from type I polysomnography
Total number of central apnea in NREM sleep in supine position: Central apneas with no oxygen desaturation threshold used and with or without arousal from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
canop
Total number of central apnea in NREM sleep in non-supine position: Central apneas with no oxygen desaturation threshold used and with or without arousal from type I polysomnography
Total number of central apnea in NREM sleep in non-supine position: Central apneas with no oxygen desaturation threshold used and with or without arousal from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
carbp
Total number of central apnea in REM sleep in supine position: Central apneas with no oxygen desaturation threshold used and with or without arousal from type I polysomnography
Total number of central apnea in REM sleep in supine position: Central apneas with no oxygen desaturation threshold used and with or without arousal from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
carop
Total number of central apnea in REM sleep in non-supine position: Central apneas with no oxygen desaturation threshold used and with or without arousal from type I polysomnography
Total number of central apnea in REM sleep in non-supine position: Central apneas with no oxygen desaturation threshold used and with or without arousal from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
hnrba3
Total number of hypopnea in NREM sleep in supine position: Hypopneas with >= 3% oxygen desaturation or with arousal from type I polysomnography
Total number of hypopnea in NREM sleep in supine position: Hypopneas with >= 3% oxygen desaturation or with arousal from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
hnrba4
Total number of hypopnea in NREM sleep in supine position: Hypopneas with >= 4% oxygen desaturation or with arousal from type I polysomnography
Total number of hypopnea in NREM sleep in supine position: Hypopneas with >= 4% oxygen desaturation or with arousal from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
hnrbp3
Total number of hypopnea in NREM sleep in supine position : Hypopneas with > 30% flow reduction and with >= 3% oxygen desaturation and with or without arousal from type I polysomnography
Total number of hypopnea in NREM sleep in supine position : Hypopneas with > 30% flow reduction and with >= 3% oxygen desaturation and with or without arousal from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
hnrbp4
Total number of hypopnea in NREM sleep in supine position : Hypopneas with > 30% flow reduction and with >= 4% oxygen desaturation and with or without arousal from type I polysomnography
Total number of hypopnea in NREM sleep in supine position : Hypopneas with > 30% flow reduction and with >= 4% oxygen desaturation and with or without arousal from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
hnroa3
Total number of hypopnea in NREM sleep in non-supine position : hypopneas with > 30% flow reduction and with >= 3% oxygen desaturation or with arousal from type I polysomnography
Total number of hypopnea in NREM sleep in non-supine position : hypopneas with > 30% flow reduction and with >= 3% oxygen desaturation or with arousal from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
hnroa4
Total number of hypopnea in NREM sleep in non-supine position : hypopneas with > 30% flow reduction and with >= 4% oxygen desaturation or with arousal from type I polysomnography
Total number of hypopnea in NREM sleep in non-supine position : hypopneas with > 30% flow reduction and with >= 4% oxygen desaturation or with arousal from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
hnrop3
Total number of hypopnea in NREM sleep in non-supine position : hypopneas with > 30% flow reduction and with >= 3% oxygen desaturation and with or without arousal from type I polysomnography
Total number of hypopnea in NREM sleep in non-supine position : hypopneas with > 30% flow reduction and with >= 3% oxygen desaturation and with or without arousal from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
hnrop4
Total number of hypopnea in NREM sleep in non-supine position : hypopneas with > 30% flow reduction and with >= 4% oxygen desaturation and with or without arousal from type I polysomnography
Total number of hypopnea in NREM sleep in non-supine position : hypopneas with > 30% flow reduction and with >= 4% oxygen desaturation and with or without arousal from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
hremba3
Total number of hypopnea in REM sleep in supine position: Hypopneas with >= 3% oxygen desaturation or with arousal from type I polysomnography
Total number of hypopnea in REM sleep in supine position: Hypopneas with >= 3% oxygen desaturation or with arousal from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
hremba4
Total number of hypopnea in REM sleep in supine position: Hypopneas with >= 4% oxygen desaturation or with arousal from type I polysomnography
Total number of hypopnea in REM sleep in supine position: Hypopneas with >= 4% oxygen desaturation or with arousal from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
hrembp3
Total number of hypopnea in REM sleep in supine position : Hypopneas with > 30% flow reduction and with >= 3% oxygen desaturation and with or without arousal from type I polysomnography
Total number of hypopnea in REM sleep in supine position : Hypopneas with > 30% flow reduction and with >= 3% oxygen desaturation and with or without arousal from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
hrembp4
Total number of hypopnea in REM sleep in supine position : Hypopneas with > 30% flow reduction and with >= 4% oxygen desaturation and with or without arousal from type I polysomnography
Total number of hypopnea in REM sleep in supine position : Hypopneas with > 30% flow reduction and with >= 4% oxygen desaturation and with or without arousal from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
hroa3
Total number of hypopnea in REM sleep in non-supine position : hypopneas with > 30% flow reduction and with >= 3% oxygen desaturation or with arousal from type I polysomnography
Total number of hypopnea in REM sleep in non-supine position : hypopneas with > 30% flow reduction and with >= 3% oxygen desaturation or with arousal from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
hroa4
Total number of hypopnea in REM sleep in non-supine position : hypopneas with > 30% flow reduction and with >= 4% oxygen desaturation or with arousal from type I polysomnography
Total number of hypopnea in REM sleep in non-supine position : hypopneas with > 30% flow reduction and with >= 4% oxygen desaturation or with arousal from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
hrop3
Total number of hypopnea in REM sleep in non-supine position : hypopneas with > 30% flow reduction and with >= 3% oxygen desaturation and with or without arousal from type I polysomnography
Total number of hypopnea in REM sleep in non-supine position : hypopneas with > 30% flow reduction and with >= 3% oxygen desaturation and with or without arousal from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
hrop4
Total number of hypopnea in REM sleep in non-supine position : hypopneas with > 30% flow reduction and with >= 4% oxygen desaturation and with or without arousal from type I polysomnography
Total number of hypopnea in REM sleep in non-supine position : hypopneas with > 30% flow reduction and with >= 4% oxygen desaturation and with or without arousal from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
oanbp
Total number of obstructive apnea in NREM sleep in supine position: Obstructive apneas with no oxygen desaturation threshold used and with or without arousal from type I polysomnography
Total number of obstructive apnea in NREM sleep in supine position: Obstructive apneas with no oxygen desaturation threshold used and with or without arousal from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
oanop
Total number of obstructive apnea in NREM sleep in non-supine position: Obstructive apneas with no oxygen desaturation threshold used and with or without arousal from type I polysomnography
Total number of obstructive apnea in NREM sleep in non-supine position: Obstructive apneas with no oxygen desaturation threshold used and with or without arousal from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
oarbp
Total number of obstructive apnea in REM sleep in supine position: Obstructive apneas with no oxygen desaturation threshold used and with or without arousal from type I polysomnography
Total number of obstructive apnea in REM sleep in supine position: Obstructive apneas with no oxygen desaturation threshold used and with or without arousal from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
oarop
Total number of obstructive apnea in REM sleep in non-supine position: Obstructive apneas with no oxygen desaturation threshold used and with or without arousal from type I polysomnography
Total number of obstructive apnea in REM sleep in non-supine position: Obstructive apneas with no oxygen desaturation threshold used and with or without arousal from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
apnhyppr
PSG Quality Assessment: Apnea/Hypopnea scoring problems
PSG Quality Assessment: Apnea/Hypopnea scoring problems

Due to signal problems, scorer was unable to reliably distinguish between apnea and hypopnea events. The distinction between apnea and hypopnea was determined to be unreliable.

Sleep Monitoring/Polysomnography/Signal Quality
arunrel
PSG Quality Assessment: Arousals unreliable
PSG Quality Assessment: Arousals unreliable

Due to signal problems, scorer was unable to reliably assess arousals. The scoring of arousals was determined to be unreliable.

Sleep Monitoring/Polysomnography/Signal Quality
overall
Overall Study Grade
Overall Study Grade Sleep Monitoring/Polysomnography/Signal Quality
remarunrel
PSG Quality Assessment: Arousals unreliable (REM)
PSG Quality Assessment: Arousals unreliable (REM)

Due to signal problems, scorer was unable to reliably assess arousals in stage REM. The scoring of arousals in stage REM was determined to be unreliable.

Sleep Monitoring/Polysomnography/Signal Quality
remnrempr
PSG Quality Assessment: REM/NREM Scoring unreliable
PSG Quality Assessment: REM/NREM Scoring unreliable

Scorer noted that there was a problem differentiating REM and non-REM sleep.

Sleep Monitoring/Polysomnography/Signal Quality
respevpr
PSG Quality Assessment: Respiratory scoring problems
PSG Quality Assessment: Respiratory scoring problems

Due to signal problems, scorer noted that there was a problem scoring respiratory events.

Sleep Monitoring/Polysomnography/Signal Quality
slewake
PSG Quality Assessment: Sleep Wake Scoring
PSG Quality Assessment: Sleep Wake Scoring

Study scored sleep/wake rather than with full sleep staging if there is not sufficient quality on EEG lead. Studies scored as sleep wake have all sleep stages scored using a default of Stage 2 and no arousals are scored.(0=no (full scoring); 1=yes (sleep/wake only))

Sleep Monitoring/Polysomnography/Signal Quality
stg1stg2pr
PSG Quality Assessment: Stage1/Stage2 Scoring unreliable
PSG Quality Assessment: Stage1/Stage2 Scoring unreliable

Scorer noted that there was a problem differentiating stage 1 and stage 2 sleep.

Sleep Monitoring/Polysomnography/Signal Quality
stg2stg3pr
PSG Quality Assessment: Stage2/Stage3-4 Scoring unreliable
PSG Quality Assessment: Stage2/Stage3-4 Scoring unreliable

Scorer noted that there was a problem differentiating stage 2 and stage 3/4 sleep.

Sleep Monitoring/Polysomnography/Signal Quality
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