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Cleveland Children's Sleep and Health Study

Name Label Folder
minsat
Minimum oxygen saturation (SaO2) in sleep time
Minimum oxygen saturation (SaO2) in sleep time

Lowest oxygen saturation (SaO2)% during sleep

Measurements/Polysomnography (PSG)
oahi3
Obstructive apnea (all oxygen desaturations) hypopnea (>= 3% oxygen desaturation) index
Obstructive apnea (all oxygen desaturations) hypopnea (>= 3% oxygen desaturation) index

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.

Measurements/Polysomnography (PSG)
oai0p
Obstructive Apnea Index all oxygen desaturations
Obstructive Apnea Index all oxygen desaturations

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

Measurements/Polysomnography (PSG)
oanbp
Number of obstructive apnea (Non-rapid eye movement sleep (NREM), Supine, all oxygen desaturations)
Number of obstructive apnea (Non-rapid eye movement sleep (NREM), Supine, all oxygen desaturations) Measurements/Polysomnography (PSG)
oanop
Number of obstructive apnea (Non-rapid eye movement sleep (NREM), Non-supine, all oxygen desaturations)
Number of obstructive apnea (Non-rapid eye movement sleep (NREM), Non-supine, all oxygen desaturations) Measurements/Polysomnography (PSG)
oarbp
Number of obstructive apnea (Rapid eye movement sleep (REM), Supine, all oxygen desaturations)
Number of obstructive apnea (Rapid eye movement sleep (REM), Supine, all oxygen desaturations) Measurements/Polysomnography (PSG)
oarop
Number of obstructive apnea (Rapid eye movement sleep (REM), Non-supine, all oxygen desaturations)
Number of obstructive apnea (Rapid eye movement sleep (REM), Non-supine, all oxygen desaturations) Measurements/Polysomnography (PSG)
pctlt70
Percent of sleep time <70% oxygen saturation (SaO2)
Percent of sleep time <70% oxygen saturation (SaO2)

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

Measurements/Polysomnography (PSG)
pctlt75
Percent of sleep time <75% oxygen saturation (SaO2)
Percent of sleep time <75% oxygen saturation (SaO2)

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

Measurements/Polysomnography (PSG)
pctlt80
Percent of sleep time <80% oxygen saturation (SaO2)
Percent of sleep time <80% oxygen saturation (SaO2)

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

Measurements/Polysomnography (PSG)
pctlt85
Percent of sleep time <85% oxygen saturation (SaO2)
Percent of sleep time <85% oxygen saturation (SaO2)

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

Measurements/Polysomnography (PSG)
pctlt95
Percent of sleep time <95% oxygen saturation (SaO2)
Percent of sleep time <95% oxygen saturation (SaO2)

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

Measurements/Polysomnography (PSG)
timerem
Time in rapid eye movement sleep (REM)
Time in rapid eye movement sleep (REM)

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

Measurements/Polysomnography (PSG)
timeremp
Percent of sleep time in rapid eye movement sleep (REM)
Percent of sleep time in rapid eye movement sleep (REM)

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

Measurements/Polysomnography (PSG)
times34p
Percent of sleep time in Stage 3-4
Percent of sleep time in Stage 3-4

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

Measurements/Polysomnography (PSG)
timest1
Time in Stage 1 sleep
Time in Stage 1 sleep

Total time scored as stage 1 sleep rounded to nearest minute

Measurements/Polysomnography (PSG)
timest1p
Percent of sleep time in Stage 1 sleep
Percent of sleep time in Stage 1 sleep

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

Measurements/Polysomnography (PSG)
timest2
Time in Stage 2 sleep
Time in Stage 2 sleep

Total time scored as stage 2 sleep rounded to nearest minute

Measurements/Polysomnography (PSG)
timest2p
Percent of sleep time in Stage 2 sleep
Percent of sleep time in Stage 2 sleep

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

Measurements/Polysomnography (PSG)
timest34
Time in Stage 3/4 sleep
Time in Stage 3/4 sleep

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

Measurements/Polysomnography (PSG)
waistge75
Waist circumference >= 75th percentile for age, gender
Waist circumference >= 75th percentile for age, gender

Based on Fernandez pediatric waist circumference percentiles

Measurements/Skinfold Assessment
waistge90
Waist circumference >= 90th percentile for age, gender
Waist circumference >= 90th percentile for age, gender

Based on Fernandez pediatric waist circumference percentiles

Measurements/Skinfold Assessment
waistgt75
Waist circumference > 75th percentile for age, gender
Waist circumference > 75th percentile for age, gender

Based on Fernandez pediatric waist circumference percentiles

Measurements/Skinfold Assessment
waistgt90
Waist circumference > 90th percentile for age, gender
Waist circumference > 90th percentile for age, gender

Based on Fernandez pediatric waist circumference percentiles

Measurements/Skinfold Assessment
waistpctcat
Waist circumference percentile category
Waist circumference percentile category

Based on Fernandez pediatric waist circumference percentiles

Measurements/Skinfold Assessment
driving
Chance of dozing while in a car, while stopped for a few minutes in traffic (ESS9)
Chance of dozing while in a car, while stopped for a few minutes in traffic (ESS9)

'I do not drive' responses should be set to missing when computing summary score.

Questionnaires/Epworth Sleepiness Scale (ESS)
essscore_adult
Total score for adult Epworth Sleepiness Scale (ESS)
Total score for adult Epworth Sleepiness Scale (ESS)

The sum of items 1-7 and 9.

Questionnaires/Epworth Sleepiness Scale (ESS)
homework
Chance of dozing while doing homework or taking a test (ESS8)
Chance of dozing while doing homework or taking a test (ESS8) Questionnaires/Epworth Sleepiness Scale (ESS)
inact
Chance of dozing while sitting, inactive, in a public place (ESS3)
Chance of dozing while sitting, inactive, in a public place (ESS3) Questionnaires/Epworth Sleepiness Scale (ESS)
lying
Chance of dozing while lying down in the afternoon when circumstances permit (ESS5)
Chance of dozing while lying down in the afternoon when circumstances permit (ESS5) Questionnaires/Epworth Sleepiness Scale (ESS)
nmiss_adult
Number of missing items on adult Epworth Sleepiness Scale (ESS) (items 1-7, 9)
Number of missing items on adult Epworth Sleepiness Scale (ESS) (items 1-7, 9) Questionnaires/Epworth Sleepiness Scale (ESS)
passeng
Chance of dozing as a passenger in a car for an hour without a break (ESS4)
Chance of dozing as a passenger in a car for an hour without a break (ESS4) Questionnaires/Epworth Sleepiness Scale (ESS)
sitquiet
Chance of dozing while sitting quietly after lunch (ESS7)
Chance of dozing while sitting quietly after lunch (ESS7) Questionnaires/Epworth Sleepiness Scale (ESS)
sitread
Chance of dozing while sitting and reading (ESS1)
Chance of dozing while sitting and reading (ESS1) Questionnaires/Epworth Sleepiness Scale (ESS)
sittalk
Chance of dozing while lying sitting and talking to someone (ESS6)
Chance of dozing while lying sitting and talking to someone (ESS6) Questionnaires/Epworth Sleepiness Scale (ESS)
sleepy
Modified Epworth Sleepiness Scale (ESS) Score >= 11
Modified Epworth Sleepiness Scale (ESS) Score >= 11 Questionnaires/Epworth Sleepiness Scale (ESS)
sleepy_adult
Adult Epworth Sleepiness Scale (ESS) Score >= 11
Adult Epworth Sleepiness Scale (ESS) Score >= 11 Questionnaires/Epworth Sleepiness Scale (ESS)
watchtv
Chance of dozing while watching TV (ESS2)
Chance of dozing while watching TV (ESS2) Questionnaires/Epworth Sleepiness Scale (ESS)
mnmeal
Mean number of meals per day
Mean number of meals per day Questionnaires/Nutrition
mnsnack
Mean number of snacks per day
Mean number of snacks per day Questionnaires/Nutrition
mrifat
Mean total fat per day
Mean total fat per day Questionnaires/Nutrition
mrigrams
Mean total grams per day
Mean total grams per day Questionnaires/Nutrition
mrikcal
Mean energy per day
Mean energy per day Questionnaires/Nutrition
mripro
Mean total protein per day
Mean total protein per day Questionnaires/Nutrition
mritcho
Mean total carbohydrate per day
Mean total carbohydrate per day Questionnaires/Nutrition
msnackfat
Mean fat from snacks per day
Mean fat from snacks per day Questionnaires/Nutrition
msnackgrams
Mean grams from snacks per day
Mean grams from snacks per day Questionnaires/Nutrition
msnackkcal
Mean kilocalories from snacks per day
Mean kilocalories from snacks per day Questionnaires/Nutrition
msnackpro
Mean protein from snacks per day
Mean protein from snacks per day Questionnaires/Nutrition
msnacktcho
Mean carbohydrates from snacks per day
Mean carbohydrates from snacks per day Questionnaires/Nutrition
nutndays
Number days of nutrition recall data
Number days of nutrition recall data Questionnaires/Nutrition
wd_bedtime
Self-reported bedtime (Weekday)
Self-reported bedtime (Weekday) Questionnaires/Sleep and Health Questionnaire (SHQ)
wd_slpdur
Self-reported weekday sleep time
Self-reported weekday sleep time

Calculated as the difference between self-reported weekday wake time and self-reported weekday bed time.

Questionnaires/Sleep and Health Questionnaire (SHQ)
wd_slpdur_hr
Self-reported weekday sleep time
Self-reported weekday sleep time

Calculated as the difference between self-reported weekday wake time and self-reported weekday bed time.

Questionnaires/Sleep and Health Questionnaire (SHQ)
wd_slpmid
Midpoint of time in bed from self report (Weekday)
Midpoint of time in bed from self report (Weekday)

Calculated as the midpoint between self-reported weekday wake time and self-reported weekday bed time.

Questionnaires/Sleep and Health Questionnaire (SHQ)
wd_waketime
Self-reported wake time (Weekday)
Self-reported wake time (Weekday) Questionnaires/Sleep and Health Questionnaire (SHQ)
we_bedtime
Self-reported bedtime (Weekend)
Self-reported bedtime (Weekend) Questionnaires/Sleep and Health Questionnaire (SHQ)
we_slpdur
Self-reported weekend sleep time
Self-reported weekend sleep time

Calculated as the difference between self-reported weekend wake time and self-reported weekend bed time.

Questionnaires/Sleep and Health Questionnaire (SHQ)
we_slpdur_hr
Self-reported weekend sleep time
Self-reported weekend sleep time

Calculated as the difference between self-reported weekend wake time and self-reported weekend bed time.

Questionnaires/Sleep and Health Questionnaire (SHQ)
we_slpmid
Midpoint of time in bed from self report (Weekend)
Midpoint of time in bed from self report (Weekend)

Calculated as the midpoint between self-reported weekend wake time and self-reported weekend bed time.

Questionnaires/Sleep and Health Questionnaire (SHQ)
we_waketime
Self-reported Wake Time (Weekend)
Self-reported Wake Time (Weekend) Questionnaires/Sleep and Health Questionnaire (SHQ)
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

Questionnaires/Sleep and Health Questionnaire (SHQ)
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

Questionnaires/Sleep and Health Questionnaire (SHQ)
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

Questionnaires/Sleep and Health Questionnaire (SHQ)
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

Questionnaires/Sleep and Health Questionnaire (SHQ)
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

Questionnaires/Sleep and Health Questionnaire (SHQ)
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

Questionnaires/Sleep and Health Questionnaire (SHQ)
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

Questionnaires/Sleep and Health Questionnaire (SHQ)
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

Questionnaires/Sleep and Health Questionnaire (SHQ)
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

Questionnaires/Sleep and Health Questionnaire (SHQ)
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

Questionnaires/Sleep and Health Questionnaire (SHQ)
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

Questionnaires/Sleep and Health Questionnaire (SHQ)
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

Questionnaires/Sleep and Health Questionnaire (SHQ)
yalert
How often alert most of the day
How often alert most of the day Questionnaires/Sleep and Health Questionnaire (SHQ)
ycafdr
Using caffeine drinks to stay awake (last month)
Using caffeine drinks to stay awake (last month) Questionnaires/Sleep and Health Questionnaire (SHQ)
ycanc
Medical history: Had cancer
Medical history: Had cancer Questionnaires/Sleep and Health Questionnaire (SHQ)
ycursmk
Currently smoke regularly
Currently smoke regularly Questionnaires/Sleep and Health Questionnaire (SHQ)
ydep
Medical history: Had depression
Medical history: Had depression Questionnaires/Sleep and Health Questionnaire (SHQ)
ydiab
Medical history: Had diabetes
Medical history: Had diabetes Questionnaires/Sleep and Health Questionnaire (SHQ)
ydifal
Difficulty falling asleep (last month)
Difficulty falling asleep (last month) Questionnaires/Sleep and Health Questionnaire (SHQ)
ydrclass
How often fall asleep during class
How often fall asleep during class Questionnaires/Sleep and Health Questionnaire (SHQ)
ydrhw
How often get sleepy while doing homework
How often get sleepy while doing homework Questionnaires/Sleep and Health Questionnaire (SHQ)
ydrkcaf
Caffeine beverages per day
Caffeine beverages per day Questionnaires/Sleep and Health Questionnaire (SHQ)
yeat
How often fall asleep while eating (last month)
How often fall asleep while eating (last month) Questionnaires/Sleep and Health Questionnaire (SHQ)
yevrsmk
Ever smoked cigarettes, cigars or pipe
Ever smoked cigarettes, cigars or pipe Questionnaires/Sleep and Health Questionnaire (SHQ)
yevrsmkstaa
Age when started smoking regularly
Age when started smoking regularly Questionnaires/Sleep and Health Questionnaire (SHQ)
yevrsmkstpa
Age when stopped smoking regularly
Age when stopped smoking regularly Questionnaires/Sleep and Health Questionnaire (SHQ)
yexsl
Excessive (too much) sleepiness during the day (last month)
Excessive (too much) sleepiness during the day (last month) Questionnaires/Sleep and Health Questionnaire (SHQ)
yfallback
How often fall back asleep after waking
How often fall back asleep after waking Questionnaires/Sleep and Health Questionnaire (SHQ)
yfrnd
How often fall asleep while with friends (last month)
How often fall asleep while with friends (last month) Questionnaires/Sleep and Health Questionnaire (SHQ)
yhelpgetup
How often need someone to wake you
How often need someone to wake you Questionnaires/Sleep and Health Questionnaire (SHQ)
yhtn
Medical history: Had hypertension
Medical history: Had hypertension Questionnaires/Sleep and Health Questionnaire (SHQ)
yins
Medical history: Had insomnia
Medical history: Had insomnia Questionnaires/Sleep and Health Questionnaire (SHQ)
yinsdx
Medical history: Insomnia diagnosed or treated by physician
Medical history: Insomnia diagnosed or treated by physician Questionnaires/Sleep and Health Questionnaire (SHQ)
ymoreslp
How often think that you need more sleep
How often think that you need more sleep Questionnaires/Sleep and Health Questionnaire (SHQ)
ynaptime_s
Self-reported daily nap time in minutes (all days)
Self-reported daily nap time in minutes (all days)

Calculated as a weighted average of self-reported daily nap time from weekdays and from weekends (ynaptime_s = 5/7 * ywd_napdur + 2/7*ywe_napdur)

Questionnaires/Sleep and Health Questionnaire (SHQ)
ynitwu
Average number of nighttime awakenings (last month)
Average number of nighttime awakenings (last month) Questionnaires/Sleep and Health Questionnaire (SHQ)
ynorst
Waking not feeling rested no matter how much sleep time you had (last month)
Waking not feeling rested no matter how much sleep time you had (last month) Questionnaires/Sleep and Health Questionnaire (SHQ)
ypara
Feeling paralyzed or unable to move for short periods on awakening (last month)
Feeling paralyzed or unable to move for short periods on awakening (last month) Questionnaires/Sleep and Health Questionnaire (SHQ)
yread
How often fall asleep while reading or studying (last month)
How often fall asleep while reading or studying (last month) Questionnaires/Sleep and Health Questionnaire (SHQ)