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Childhood Adenotonsillectomy Trial

Name Label Folder
rdirop
Hypopnea Index (REM, Non-Supine) : (Hypopneas with > 50% flow reduction and with no oxygen desaturation threshold used and with or without arousal) / hour of REM sleep in non-supine position from type I polysomnography
Hypopnea Index (REM, Non-Supine) : (Hypopneas with > 50% flow reduction and with no oxygen desaturation threshold used and with or without arousal) / hour of REM sleep in non-supine position from type I polysomnography

Calculated - Summary metric of sleep disordered breathing events.

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
rdirop3
Hypopnea Index (REM, Non-Supine) : (Hypopneas with > 50% flow reduction and with >= 3% oxygen desaturation and with or without arousal) / hour of NREM sleep in non-supine position from type I polysomnography
Hypopnea Index (REM, Non-Supine) : (Hypopneas with > 50% flow reduction and with >= 3% oxygen desaturation and with or without arousal) / hour of NREM sleep in non-supine position from type I polysomnography

Calculated - Summary metric of sleep disordered breathing events.

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
ai_all
Arousal Index: Number of arousals per hour of sleep from type I polysomnography
Arousal Index: Number of arousals per hour of sleep from type I polysomnography

All arousals were scored but only arousals that started in epoch of sleep are included in the arousal index calculations.

[(Total number of arousals) / (hours of sleep)]

Sleep Monitoring/Polysomnography/Arousals
ai_nrem
Arousal Index (NREM): number of arousals per hour of NREM sleep from type I polysomnography
Arousal Index (NREM): number of arousals per hour of NREM sleep from type I polysomnography Sleep Monitoring/Polysomnography/Arousals
ai_rem
Arousal Index (REM): number of arousals per hour of REM sleep from type I polysomnography
Arousal Index (REM): number of arousals per hour of REM sleep from type I polysomnography Sleep Monitoring/Polysomnography/Arousals
capnotype
Capnograph type
Capnograph type Sleep Monitoring/Polysomnography/Capnography
co2dur
Hours of usable carbon dioxide (CO2)
Hours of usable carbon dioxide (CO2)

Hours of usable carbon dioxide (CO2) signal - requires use of calibrated channel type with upper and lower limits for valid signal

Sleep Monitoring/Polysomnography/Capnography
nova_est_co2avgnr
Average end-tidal carbon dioxide (ETCO2) in non-rapid eye movement sleep (NREM) (normalized for capnograph type)
Average end-tidal carbon dioxide (ETCO2) in non-rapid eye movement sleep (NREM) (normalized for capnograph type) Sleep Monitoring/Polysomnography/Capnography
nova_est_co2avgr
Average end-tidal carbon dioxide (ETCO2) in rapid eye movement sleep (REM) (normalized for capnograph type)
Average end-tidal carbon dioxide (ETCO2) in rapid eye movement sleep (REM) (normalized for capnograph type) Sleep Monitoring/Polysomnography/Capnography
nova_est_co2blslp
Baseline end-tidal carbon dioxide (ETCO2) asleep (normalized for capnograph type)
Baseline end-tidal carbon dioxide (ETCO2) asleep (normalized for capnograph type) Sleep Monitoring/Polysomnography/Capnography
nova_est_co2blwake
Baseline end-tidal carbon dioxide (ETCO2) awake (normalized for capnograph type)
Baseline end-tidal carbon dioxide (ETCO2) awake (normalized for capnograph type) Sleep Monitoring/Polysomnography/Capnography
nova_est_co2peak
Peak end-tidal carbon dioxide (ETCO2) asleep (normalized for capnograph type)
Peak end-tidal carbon dioxide (ETCO2) asleep (normalized for capnograph type) Sleep Monitoring/Polysomnography/Capnography
nova_est_pctco2g45
Percentage Total Sleep Time (TST) where end-tidal carbon dioxide (ETCO2) > 45 millimeters (mm) mercury (Hg) (normalized for capnograph type)
Percentage Total Sleep Time (TST) where end-tidal carbon dioxide (ETCO2) > 45 millimeters (mm) mercury (Hg) (normalized for capnograph type) Sleep Monitoring/Polysomnography/Capnography
nova_est_pctco2g50
Percentage Total Sleep Time (TST) where end-tidal carbon dioxide (ETCO2) > 50 millimeters (mm) mercury (Hg) (normalized for capnograph type)
Percentage Total Sleep Time (TST) where end-tidal carbon dioxide (ETCO2) > 50 millimeters (mm) mercury (Hg) (normalized for capnograph type) Sleep Monitoring/Polysomnography/Capnography
rco2avgnr
Average end-tidal carbon dioxide (ETCO2) in non-rapid eye movement sleep (NREM)
Average end-tidal carbon dioxide (ETCO2) in non-rapid eye movement sleep (NREM) Sleep Monitoring/Polysomnography/Capnography
rco2avgr
Average end-tidal carbon dioxide (ETCO2) in rapid eye movement sleep (REM)
Average end-tidal carbon dioxide (ETCO2) in rapid eye movement sleep (REM) Sleep Monitoring/Polysomnography/Capnography
rco2blslp
Baseline end-tidal carbon dioxide (ETCO2) asleep
Baseline end-tidal carbon dioxide (ETCO2) asleep Sleep Monitoring/Polysomnography/Capnography
rco2blwake
Baseline end-tidal carbon dioxide (ETCO2) awake
Baseline end-tidal carbon dioxide (ETCO2) awake Sleep Monitoring/Polysomnography/Capnography
rco2peak
Peak end-tidal carbon dioxide (ETCO2) asleep
Peak end-tidal carbon dioxide (ETCO2) asleep Sleep Monitoring/Polysomnography/Capnography
rpctco2g45
Percentage of Total Sleep Time (TST) where end-tidal carbon dioxide (ETCO2) > 45 millimeters (mm) mercury (Hg)
Percentage of Total Sleep Time (TST) where end-tidal carbon dioxide (ETCO2) > 45 millimeters (mm) mercury (Hg) Sleep Monitoring/Polysomnography/Capnography
rpctco2g50
Percentage of Total Sleep Time (TST) where end-tidal carbon dioxide (ETCO2) > 50 millimeters (mm) mercury (Hg)
Percentage of Total Sleep Time (TST) where end-tidal carbon dioxide (ETCO2) > 50 millimeters (mm) mercury (Hg) Sleep Monitoring/Polysomnography/Capnography
bpmavg
Average level of heart rate from type I polysomnography
Average level of heart rate from type I polysomnography

entire recording

Sleep Monitoring/Polysomnography/Heart Rate
bpmmax
Maximum level of heart rate from type I polysomnography
Maximum level of heart rate from type I polysomnography

entire recording

Sleep Monitoring/Polysomnography/Heart Rate
bpmmin
Minimum level of heart rate from type I polysomnography
Minimum level of heart rate from type I polysomnography

entire recording

Sleep Monitoring/Polysomnography/Heart Rate
avgrplm
Number of periodic limb movements per hour of REM sleep from type I polysomnography
Number of periodic limb movements per hour of REM sleep from type I polysomnography

Number of PLM per hour of REM sleep

Sleep Monitoring/Polysomnography/Limb Movements
lmar
Total number of limb movements with arousal and respiratory event from type I polysomnography
Total number of limb movements with arousal and respiratory event from type I polysomnography

Total limb movements with arousal and respiratory events

Sleep Monitoring/Polysomnography/Limb Movements
noplm
Total number of periodic limb movements in sleep from type I polysomnography
Total number of periodic limb movements in sleep from type I polysomnography

Number of PLM during sleep

Sleep Monitoring/Polysomnography/Limb Movements
plmaslp
Total number of periodic limb movements with arousal from type I polysomnography
Total number of periodic limb movements with arousal from type I polysomnography Sleep Monitoring/Polysomnography/Limb Movements
avsao2nh
Average oxygen saturation in NREM sleep from type I polysomnography
Average oxygen saturation in NREM sleep from type I polysomnography

The mean of all oxygen saturation values in epochs scored as stages other than REM (i.e., 1,2,3/4).

Sleep Monitoring/Polysomnography/Oxygen Saturation
avsao2rh
Average oxygen saturation in REM sleep from type I polysomnography
Average oxygen saturation in REM sleep from type I polysomnography

The mean of all oxygen saturation values in epochs scored as stage REM.

Sleep Monitoring/Polysomnography/Oxygen Saturation
mnsao2nh
Minimum oxygen saturation in NREM sleep from type I polysomnography
Minimum oxygen saturation in NREM sleep from type I polysomnography

The minimum of all oxygen saturation values in epochs scored as stages other than REM (i.e., 1,2,3/4).

Sleep Monitoring/Polysomnography/Oxygen Saturation
mnsao2rh
Minimum oxygen saturation in REM sleep from type I polysomnography
Minimum oxygen saturation in REM sleep from type I polysomnography

The minimum of all oxygen saturation values in epochs scored as stage REM.

Sleep Monitoring/Polysomnography/Oxygen Saturation
mxsao2nh
Maximum oxygen saturation in NREM sleep from type I polysomnography
Maximum oxygen saturation in NREM sleep from type I polysomnography Sleep Monitoring/Polysomnography/Oxygen Saturation
mxsao2rh
Maximum oxygen saturation in REM sleep from type I polysomnography
Maximum oxygen saturation in REM sleep from type I polysomnography Sleep Monitoring/Polysomnography/Oxygen Saturation
ndes2ph
Total number of oxygen desaturation with oxygen desaturation >= 2% from type I polysomnography
Total number of oxygen desaturation with oxygen desaturation >= 2% from type I polysomnography Sleep Monitoring/Polysomnography/Oxygen Saturation
ndes3ph
Total number of oxygen desaturation with oxygen desaturation >= 3% from type I polysomnography
Total number of oxygen desaturation with oxygen desaturation >= 3% from type I polysomnography Sleep Monitoring/Polysomnography/Oxygen Saturation
ndes4ph
Total number of oxygen desaturation with oxygen desaturation >= 4% from type I polysomnography
Total number of oxygen desaturation with oxygen desaturation >= 4% from type I polysomnography Sleep Monitoring/Polysomnography/Oxygen Saturation
ndes5ph
Total number of oxygen desaturation with oxygen desaturation >= 5% from type I polysomnography
Total number of oxygen desaturation with oxygen desaturation >= 5% from type I polysomnography Sleep Monitoring/Polysomnography/Oxygen Saturation
odi3
Oxygen Desaturation Index: Oxygen desaturation with >= 3% desat per hour of sleep from type I polysomnography
Oxygen Desaturation Index: Oxygen desaturation with >= 3% desat per hour of sleep from type I polysomnography Sleep Monitoring/Polysomnography/Oxygen Saturation
odi4
Oxygen Desaturation Index: Oxygen desaturation with >= 4% desat per hour of sleep from type I polysomnography
Oxygen Desaturation Index: Oxygen desaturation with >= 4% desat per hour of sleep from type I polysomnography Sleep Monitoring/Polysomnography/Oxygen Saturation
pctsa75
Percentage duration of sleep with oxygen saturation <= 75% from type I polysomnography
Percentage duration of sleep with oxygen saturation <= 75% from type I polysomnography

[(total time oxygen saturation (SaO2) is <= 75%) / (Total Sleep Time (TST))] * 100

Sleep Monitoring/Polysomnography/Oxygen Saturation
pctsa80
Percentage duration of sleep with oxygen saturation <= 80% from type I polysomnography
Percentage duration of sleep with oxygen saturation <= 80% from type I polysomnography

[(total time oxygen saturation (SaO2) is <= 80%) / (Total Sleep Time (TST))] * 100

Sleep Monitoring/Polysomnography/Oxygen Saturation
pctsa80h
Percentage duration of sleep with oxygen saturation < 80% from type I polysomnography
Percentage duration of sleep with oxygen saturation < 80% from type I polysomnography

[(total time oxygen saturation (SaO2) is < 80%) / (Total Sleep Time (TST))] * 100

Sleep Monitoring/Polysomnography/Oxygen Saturation
pctsa85
Percentage duration of sleep with oxygen saturation <= 85% from type I polysomnography
Percentage duration of sleep with oxygen saturation <= 85% from type I polysomnography

[(total time oxygen saturation (SaO2) is <= 85%) / (Total Sleep Time (TST))] * 100

Sleep Monitoring/Polysomnography/Oxygen Saturation
pctsa85h
Percentage duration of sleep with oxygen saturation < 85% from type I polysomnography
Percentage duration of sleep with oxygen saturation < 85% from type I polysomnography

[(total time oxygen saturation (SaO2) is < 85%) / (Total Sleep Time (TST))] * 100

Sleep Monitoring/Polysomnography/Oxygen Saturation
pctsa90
Percentage duration of sleep with oxygen saturation <= 90% from type I polysomnography
Percentage duration of sleep with oxygen saturation <= 90% from type I polysomnography

[(total time oxygen saturation (SaO2) is <= 90%) / (Total Sleep Time (TST))] * 100

Sleep Monitoring/Polysomnography/Oxygen Saturation
pctsa90h
Percent of the total sleep duration with oxygen saturation below 90% from type I polysomnography
Percent of the total sleep duration with oxygen saturation below 90% from type I polysomnography

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

[(total time oxygen saturation (SaO2) is < 90%) / (Total Sleep Time (TST))] * 100

Sleep Monitoring/Polysomnography/Oxygen Saturation
pctsa92
Percentage duration of sleep with oxygen saturation <= 92% from type I polysomnography
Percentage duration of sleep with oxygen saturation <= 92% from type I polysomnography

[(total time oxygen saturation (SaO2) is <= 92%) / (Total Sleep Time (TST))] * 100

Sleep Monitoring/Polysomnography/Oxygen Saturation
pctsa95
Percentage duration of sleep with oxygen saturation <= 95% from type I polysomnography
Percentage duration of sleep with oxygen saturation <= 95% from type I polysomnography

[(total time oxygen saturation (SaO2) is <= 95%) / (Total Sleep Time (TST))] * 100

Sleep Monitoring/Polysomnography/Oxygen Saturation
pctsa95h
Percentage duration of sleep with oxygen saturation < 95% from type I polysomnography
Percentage duration of sleep with oxygen saturation < 95% from type I polysomnography

[(total time oxygen saturation (SaO2) is < 95%) / (Total Sleep Time (TST))] * 100

Sleep Monitoring/Polysomnography/Oxygen Saturation
sao2nrem
Average oxygen saturation in NREM sleep from type I polysomnography
Average oxygen saturation in NREM sleep from type I polysomnography

[mean(all oxygen saturation (SaO2) values in non-rapid eye movement sleep (NREM))]. will be missing if study scored as sleep/wake only.

Sleep Monitoring/Polysomnography/Oxygen Saturation
sao2rem
Average oxygen saturation in REM sleep from type I polysomnography
Average oxygen saturation in REM sleep from type I polysomnography

[mean(all oxygen saturation (SaO2) values in rapid eye movement sleep (REM))]. will be missing if study scored as sleep/wake only.

Sleep Monitoring/Polysomnography/Oxygen Saturation
cent_obs_ratio
Ratio of the number of central apneas with no oxygen desaturation threshold used and with or without arousal to the number of obstructive apneas with no oxygen desaturation threshold used and with or without arousal from type I polysomnography
Ratio of the number of central apneas with no oxygen desaturation threshold used and with or without arousal to the number of obstructive apneas with no oxygen desaturation threshold used and with or without arousal from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
cent_obs_ratioa
Ratio of the number of central apneas with no oxygen desaturation threshold used or with arousal to the number of obstructive apneas with no oxygen desaturation threshold used or with arousal from type I polysomnography
Ratio of the number of central apneas with no oxygen desaturation threshold used or with arousal to the number of obstructive apneas with no oxygen desaturation threshold used or with arousal from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
cavgdur
Average duration of central apnea from type I polysomnography
Average duration of central apnea from type I polysomnography

duration (entire recording)

Sleep Monitoring/Polysomnography/Respiratory Event Lengths
havgdur
Average duration of hypopnea from type I polysomnography
Average duration of hypopnea from type I polysomnography

duration (entire recording)

Sleep Monitoring/Polysomnography/Respiratory Event Lengths
longap
Maximum duration of apnea from type I polysomnography
Maximum duration of apnea from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Lengths
longhyp
Maximum duration of hypopnea from type I polysomnography
Maximum duration of hypopnea from type I polysomnography

(entire recording)

Sleep Monitoring/Polysomnography/Respiratory Event Lengths
oavgdur
Average duration of obstructive apnea from type I polysomnography
Average duration of obstructive apnea from type I polysomnography

duration (entire recording)

Sleep Monitoring/Polysomnography/Respiratory Event Lengths
ahilt2
Obstructive Apnea Index (OAI) < 1 and Apnea-Hypopnea Index (AHI) < 2 (normal range) = 1 Ineligible Normal
Obstructive Apnea Index (OAI) < 1 and Apnea-Hypopnea Index (AHI) < 2 (normal range) = 1 Ineligible Normal Sleep Monitoring/Polysomnography/Signal Quality
capdur
Hours of usable cap
Hours of usable cap

Hours of usable cap signal - requires use of calibrated channel type with upper and lower limits for valid signal

Sleep Monitoring/Polysomnography/Signal Quality
eliginelig
Eligibility status by Polysomnography (PSG)
Eligibility status by Polysomnography (PSG)

Ineligible if omahi3 <2 and omai0p<1 or meets any of urgent criteria variables ahiov30=1, saO2lt90=1, unuhrou=1,unuhroth=1

Sleep Monitoring/Polysomnography/Signal Quality
overall
Overall study grade
Overall study grade Sleep Monitoring/Polysomnography/Signal Quality
oximdur
Hours of usable oximetry
Hours of usable oximetry Sleep Monitoring/Polysomnography/Signal Quality
posn
Position sensor working
Position sensor working Sleep Monitoring/Polysomnography/Signal Quality
qucap
Quality of cap
Quality of cap

usable mainly artifact free signal

Sleep Monitoring/Polysomnography/Signal Quality
quco2
Quality of carbon dioxide (CO2)
Quality of carbon dioxide (CO2) Sleep Monitoring/Polysomnography/Signal Quality
quoxim
Quality of oximetry
Quality of oximetry Sleep Monitoring/Polysomnography/Signal Quality
stdydt
Date of study
Date of study Sleep Monitoring/Polysomnography/Signal Quality
nremepbp
Total duration of sleep in NREM sleep in supine position from type I polysomnography
Total duration of sleep in NREM sleep in supine position from type I polysomnography Sleep Monitoring/Polysomnography/Sleep Architecture
nremepop
Total duration of sleep in NREM sleep in non-supine position from type I polysomnography
Total duration of sleep in NREM sleep in non-supine position from type I polysomnography Sleep Monitoring/Polysomnography/Sleep Architecture
nsupinep
Percentage duration of sleep in non-supine position from type I polysomnography
Percentage duration of sleep in non-supine position from type I polysomnography

[100*(number of minutes of sleep in non-supine body position) / (Total Sleep Time (TST))]

Sleep Monitoring/Polysomnography/Sleep Architecture
pcstah3d
Percentage duration of sleep associated with apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 3% oxygen desaturation or with arousal from type I polysomnography
Percentage duration of sleep associated with apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 3% oxygen desaturation or with arousal from type I polysomnography Sleep Monitoring/Polysomnography/Sleep Architecture
pcstahar
Percentage of total sleep duration: (Apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and no oxygen desaturation and only with arousal) from type I polysomnography
Percentage of total sleep duration: (Apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and no oxygen desaturation and only with arousal) from type I polysomnography Sleep Monitoring/Polysomnography/Sleep Architecture
pcstahda
Percentage duration of sleep associated with apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 3% oxygen desaturation and with or without arousal from type I polysomnography
Percentage duration of sleep associated with apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 3% oxygen desaturation and with or without arousal from type I polysomnography

Calculated - Summary metric of sleep disordered breathing events. The definition of hypopnea events is consistent with the American Academy of Sleep Medicine (AASM) 2007 Manual (pediatric). [Iber C et al. The AASM manual for the scoring of sleep and associated events: rules, terminology and technical specifications. Vol. 1. Westchester, IL: American Academy of Sleep Medicine, 2007]

Search for all AHI variables consistent with the clinical guidelines within this dataset

Sleep Monitoring/Polysomnography/Sleep Architecture
remepbp
Total duration of sleep in REM sleep in supine position from type I polysomnography
Total duration of sleep in REM sleep in supine position from type I polysomnography

Total time in rapid eye movement sleep (REM) with supine body position

Sleep Monitoring/Polysomnography/Sleep Architecture
remepop
Total duration of sleep in REM sleep in non-supine position from type I polysomnography
Total duration of sleep in REM sleep in non-supine position from type I polysomnography

Total time in rapid eye movement sleep (REM) with non-supine body position

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
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).

Sleep Monitoring/Polysomnography/Sleep Architecture
supinep
Percentage duration of sleep in supine position from type I polysomnography
Percentage duration of sleep in supine position from type I polysomnography

Percent of sleep time in supine body position [100*(number of minutes of sleep in supine body position) / (Total Sleep Time (TST))]

Sleep Monitoring/Polysomnography/Sleep Architecture
timebedp
Total period of bed (in-bed) from type I polysomnography
Total period of bed (in-bed) from type I polysomnography

Time from lights out to lights on

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)

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).

Percent of sleep time in rapid eye movement sleep (REM) [100*(number of minutes scored as rapid eye movement sleep (REM)) / (Total Sleep Time (TST))] * 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

Percent of sleep time in stage 3-4 [100*(number of minutes scored as stage 3-4) / (Total Sleep Time (TST))]

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 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).

Percent of sleep time in stage 1 [100*(number of minutes scored as stage 1) / (Total Sleep Time (TST))]

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 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).

Percent of sleep time in stage 2 [100*(number of minutes scored as stage 2) / (Total Sleep Time (TST))]

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 rounded to nearest minute

Sleep Monitoring/Polysomnography/Sleep Architecture
waso
Wake After Sleep Onset: the total duration between sleep onset and lights-on/out-bed time while being awake from type I polysomnography
Wake After Sleep Onset: the total duration between sleep onset and lights-on/out-bed time while being awake from type I polysomnography

Total amount of time spent awake after going to sleep [(time in bed) - (sleep latency) - (Total Sleep Time (TST))]

Sleep Monitoring/Polysomnography/Sleep Architecture
epworthscore_adult
Epworth Sleepiness Scale: Total score
Epworth Sleepiness Scale: Total score

Calculated - Total score based on an 8-item questionnaires ranking likelihood of dozing off Johns MW 1991 (PubMed ID: 1798888). Scale 0-3 for individual items; 0 to 24 for overall score.

Search for all ESS variables within this dataset

Sleep Questionnaires/Hypersomnia/Epworth Sleepiness Scale (ESS)
epworthscore_modified
Total score for modified Epworth Sleepiness Scale (ESS)
Total score for modified Epworth Sleepiness Scale (ESS)

The sum of items 1-10.

Sleep Questionnaires/Hypersomnia/Epworth Sleepiness Scale (ESS)
pedsql_total_scale_score_par
Pediatric Quality of Life Inventory: Parent Total Score
Pediatric Quality of Life Inventory: Parent Total Score

Summary score for the Pediatric Quality of Life Inventory. Varni, Seid, and Rode 1999 (PubMed ID: 10024117) Each item is reverse transformed from 1-4 likert scale to 100-0 score. Higher scores indicate better HRQOL (Health-Related Quality of Life). The summary score is the mean is computed as the sum of all the items over the number of items answered on all the Scales.

Search for all PedsQL variables within this dataset

Sleep Questionnaires/Pediatric Quality of Life Inventory (PedsQL)/Parent Report
ref1
Recruitment source
Recruitment source Administrative
ref3
What is the screening Polysomnography (PSG) date?
What is the screening Polysomnography (PSG) date? Administrative
vnum
Visit Number
Visit Number Administrative
change_in_symptoms
Change in symptoms
Change in symptoms Administrative/CONSORT Diagram Components
crossovers
Did this child crossover?
Did this child crossover? Administrative/CONSORT Diagram Components
followup_status
Patient received followup
Patient received followup Administrative/CONSORT Diagram Components
had_surgery
Child had surgery?
Child had surgery? Administrative/CONSORT Diagram Components