Please fill out our short survey.

Childhood Adenotonsillectomy Trial

Name Label Folder
clusterid
Recoded Site ID for longitudinal models
Recoded Site ID for longitudinal models

The original Site ID was removed from the dataset because it was considered identifiable. This variable has obfuscated the original Site IDs.

Administrative
new_pid
Original Participant ID
Original Participant ID

This is the participant identifier that is present on Biologic Specimen and Data Repository Information Coordinating Center (BioLINCC) datasets. Use nsrrid when linking these data to other data on the National Sleep Research Resource (NSRR).

Administrative
nsrrid
NSRR Subject Identifier
NSRR Subject Identifier

The National Sleep Research Resource (NSRR) subject identifer links the subject's data and files. Use new_pid to link with Biologic Specimen and Data Repository Information Coordinating Center (BioLINCC) and cohort-specific data.

Administrative
completer_per_protocol
Participant completed the study as per protocol
Participant completed the study as per protocol Administrative/CONSORT Diagram Components
arm
Treatment Arm
Treatment Arm

The randomization code assigned by the Data Management System (DMS).

Administrative/Randomization
ant3
Child's standing height
Child's standing height Anthropometry
ant4
Child's weight
Child's weight Anthropometry
ant5
Child's Body mass index (BMI)
Child's Body mass index (BMI) Anthropometry
bmiz
Z-score for body mass index (BMI)-for-age
Z-score for body mass index (BMI)-for-age Anthropometry
chol
Total cholesterol levels
Total cholesterol levels Biochemical Testing/Biochemical Results
crp_ug_ml
C-reactive protein (CRP) levels
C-reactive protein (CRP) levels Biochemical Testing/Biochemical Results
glucose_mmol
Blood glucose levels
Blood glucose levels Biochemical Testing/Biochemical Results
hdl_mg_dl
Blood high-density lipoprotein (HDL) levels
Blood high-density lipoprotein (HDL) levels Biochemical Testing/Biochemical Results
homa
Homeostasis Model Assessment (HOMA) estimate of insulin resistance
Homeostasis Model Assessment (HOMA) estimate of insulin resistance Biochemical Testing/Biochemical Results
insulin_uil_ml
Blood insulin levels
Blood insulin levels Biochemical Testing/Biochemical Results
ldl_mg_dl
Blood low-density lipoprotein (LDL) levels
Blood low-density lipoprotein (LDL) levels Biochemical Testing/Biochemical Results
sgl_mg_dl
Serum glucose levels
Serum glucose levels Biochemical Testing/Biochemical Results
trig
Triglyceride levels
Triglyceride levels Biochemical Testing/Biochemical Results
bp41
Average systolic blood pressure
Average systolic blood pressure Blood Pressure (BP)
bp42
Average diastolic blood pressure
Average diastolic blood pressure Blood Pressure (BP)
ageyear_at_meas
Age computed in years at time anthropometry were taken
Age computed in years at time anthropometry were taken Demographics/Child Demographic Information
chi2
Child's gender
Child's gender Demographics/Child Demographic Information
chi3
Child's ethnicity
Child's ethnicity Demographics/Child Demographic Information
chi5
Child's grade
Child's grade Demographics/Child Demographic Information
male
Gender
Gender Demographics/Child Demographic Information
race3
Race
Race Demographics/Child Demographic Information
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/Polysomnography (PSG)/Administrative
oxitype
Oximeter type
Oximeter type

1 = Masimo, 2 = Nonin, 3 = Nonin Biologic

Sleep/Polysomnography (PSG)/Administrative
stdydt
Date of study
Date of study Sleep/Polysomnography (PSG)/Administrative
unittype
Polysomnography (PSG) unit type
Polysomnography (PSG) unit type Sleep/Polysomnography (PSG)/Administrative
ai
Arousal Index - Compumedics calculated - changed with new American Academy of Sleep Medicine (AASM) rules now have two other variables
Arousal Index - Compumedics calculated - changed with new American Academy of Sleep Medicine (AASM) rules now have two other variables

(Total number of arousals) / (hours of sleep) New Variable @632 for Prof 3.1 build 239 Number of Arousals per hour during Report Time Options: 0 - All (default); 1 - Type 1 Arousal; 2 - Type 2 Arousal; 3 - Type 3 Arousal; 4 - Type 4 Arousal; 5 - Type 5 Arousal - See Arousal Sheet with new application of American Academy of Sleep Medicine (AASM) rules

Sleep/Polysomnography (PSG)/Arousals
ai_all
Overall Arousal Index
Overall Arousal Index

Arousal Index - total arousals per hour of sleep [(Total number of arousals) / (hours of sleep)]

Sleep/Polysomnography (PSG)/Arousals
ai_nrem
Arousal Index non-rapid eye movement sleep (NREM)
Arousal Index non-rapid eye movement sleep (NREM)

Non-rapid eye movement sleep (NREM) Arousal Index - total arousals in non-rapid eye movement sleep (NREM) per hours of non-rapid eye movement sleep (NREM) [(Total number of arousals in non-rapid eye movement sleep (NREM)) / (hours of non-rapid eye movement sleep (NREM))]

Sleep/Polysomnography (PSG)/Arousals
ai_rem
Arousal Index rapid eye movement sleep (REM)
Arousal Index rapid eye movement sleep (REM)

Rapid eye movement sleep (REM) Arousal Index - total arousals in rapid eye movement sleep (REM) per hours of rapid eye movement sleep (REM) (Total number of arousals in rapid eye movement sleep (REM)) / (hours of rapid eye movement sleep (REM))

Sleep/Polysomnography (PSG)/Arousals
capnotype
Capnograph type
Capnograph type Sleep/Polysomnography (PSG)/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/Polysomnography (PSG)/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/Polysomnography (PSG)/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/Polysomnography (PSG)/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/Polysomnography (PSG)/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/Polysomnography (PSG)/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/Polysomnography (PSG)/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/Polysomnography (PSG)/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/Polysomnography (PSG)/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/Polysomnography (PSG)/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/Polysomnography (PSG)/Capnography
rco2blslp
Baseline end-tidal carbon dioxide (ETCO2) asleep
Baseline end-tidal carbon dioxide (ETCO2) asleep Sleep/Polysomnography (PSG)/Capnography
rco2blwake
Baseline end-tidal carbon dioxide (ETCO2) awake
Baseline end-tidal carbon dioxide (ETCO2) awake Sleep/Polysomnography (PSG)/Capnography
rco2peak
Peak end-tidal carbon dioxide (ETCO2) asleep
Peak end-tidal carbon dioxide (ETCO2) asleep Sleep/Polysomnography (PSG)/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/Polysomnography (PSG)/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/Polysomnography (PSG)/Capnography
bpmavg
Average heart rate
Average heart rate

entire recording

Sleep/Polysomnography (PSG)/Heart Rate (HR)
bpmmax
Highest heart rate
Highest heart rate

entire recording

Sleep/Polysomnography (PSG)/Heart Rate (HR)
bpmmin
Lowest heart rate
Lowest heart rate

entire recording

Sleep/Polysomnography (PSG)/Heart Rate (HR)
avsao2nh
Average oxygen saturation (SaO2) during non-rapid eye movement sleep (NREM)
Average oxygen saturation (SaO2) during non-rapid eye movement sleep (NREM) Sleep/Polysomnography (PSG)/Oxygen Saturation (SaO2)
avsao2rh
Average oxygen saturation (SaO2) during rapid eye movement sleep (REM)
Average oxygen saturation (SaO2) during rapid eye movement sleep (REM) Sleep/Polysomnography (PSG)/Oxygen Saturation (SaO2)
mnsao2nh
Minimum oxygen saturation (SaO2) during non-rapid eye movement sleep (NREM)
Minimum oxygen saturation (SaO2) during non-rapid eye movement sleep (NREM) Sleep/Polysomnography (PSG)/Oxygen Saturation (SaO2)
mnsao2rh
Minimum oxygen saturation (SaO2) during rapid eye movement sleep (REM)
Minimum oxygen saturation (SaO2) during rapid eye movement sleep (REM) Sleep/Polysomnography (PSG)/Oxygen Saturation (SaO2)
mxsao2nh
Maximum oxygen saturation (SaO2) during non-rapid eye movement sleep (NREM)
Maximum oxygen saturation (SaO2) during non-rapid eye movement sleep (NREM) Sleep/Polysomnography (PSG)/Oxygen Saturation (SaO2)
mxsao2rh
Maximum oxygen saturation (SaO2) during rapid eye movement sleep (REM)
Maximum oxygen saturation (SaO2) during rapid eye movement sleep (REM) Sleep/Polysomnography (PSG)/Oxygen Saturation (SaO2)
ndes2ph
Number of desaturations with >=2% desaturation
Number of desaturations with >=2% desaturation Sleep/Polysomnography (PSG)/Oxygen Saturation (SaO2)
ndes3ph
Number of desaturation with >=3% desaturation
Number of desaturation with >=3% desaturation Sleep/Polysomnography (PSG)/Oxygen Saturation (SaO2)
ndes4ph
Number of desaturation with >=4% desaturation
Number of desaturation with >=4% desaturation Sleep/Polysomnography (PSG)/Oxygen Saturation (SaO2)
ndes5ph
Number of desaturation with >=5% desaturation
Number of desaturation with >=5% desaturation Sleep/Polysomnography (PSG)/Oxygen Saturation (SaO2)
odi
Oxygen Desaturation Index >=3%
Oxygen Desaturation Index >=3% Sleep/Polysomnography (PSG)/Oxygen Saturation (SaO2)
odi3
Oxygen Desaturation Index at >=3% (during sleep time)
Oxygen Desaturation Index at >=3% (during sleep time) Sleep/Polysomnography (PSG)/Oxygen Saturation (SaO2)
odi4
Oxygen Desaturation Index at >=4% (during sleep time)
Oxygen Desaturation Index at >=4% (during sleep time) Sleep/Polysomnography (PSG)/Oxygen Saturation (SaO2)
pctle80
Percentage of time <= 80% oxygen saturation (SaO2)
Percentage of time <= 80% oxygen saturation (SaO2)

[100*(total number of minutes with oxygen saturation (SaO2) <= 80) / (Total Sleep Time (TST))].

Sleep/Polysomnography (PSG)/Oxygen Saturation (SaO2)
pctle85
Percentage of time <= 85% oxygen saturation (SaO2)
Percentage of time <= 85% oxygen saturation (SaO2)

[100*(total number of minutes with oxygen saturation (SaO2) <= 85) / (Total Sleep Time (TST))].

Sleep/Polysomnography (PSG)/Oxygen Saturation (SaO2)
pctle90
Percentage of time <= 90% oxygen saturation (SaO2)
Percentage of time <= 90% oxygen saturation (SaO2)

[100*(total number of minutes with oxygen saturation (SaO2) <= 90) / (Total Sleep Time (TST))].

Sleep/Polysomnography (PSG)/Oxygen Saturation (SaO2)
pctle92
Percentage of time <= 92% oxygen saturation (SaO2)
Percentage of time <= 92% oxygen saturation (SaO2)

[100*(total number of minutes with oxygen saturation (SaO2) <= 92) / (Total Sleep Time (TST))].

Sleep/Polysomnography (PSG)/Oxygen Saturation (SaO2)
pctlt85
Percentage of time < 85% oxygen saturation (SaO2)
Percentage of time < 85% oxygen saturation (SaO2)

[100*(total number of minutes with oxygen saturation (SaO2) < 85) / (Total Sleep Time (TST))].

Sleep/Polysomnography (PSG)/Oxygen Saturation (SaO2)
pctlt90
Percentage of time < 90% oxygen saturation (SaO2)
Percentage of time < 90% oxygen saturation (SaO2)

[100*(total number of minutes with oxygen saturation (SaO2) < 90) / (Total Sleep Time (TST))].

Sleep/Polysomnography (PSG)/Oxygen Saturation (SaO2)
pctsa75
Percentage of sleep time oxygen saturation (SaO2) is <= 75%
Percentage of sleep time oxygen saturation (SaO2) is <= 75%

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

Sleep/Polysomnography (PSG)/Oxygen Saturation (SaO2)
pctsa80
Percentage of sleep time oxygen saturation (SaO2) is <= 80%
Percentage of sleep time oxygen saturation (SaO2) is <= 80%

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

Sleep/Polysomnography (PSG)/Oxygen Saturation (SaO2)
pctsa80h
Percentage of sleep time oxygen saturation (SaO2) is < 80%
Percentage of sleep time oxygen saturation (SaO2) is < 80%

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

Sleep/Polysomnography (PSG)/Oxygen Saturation (SaO2)
pctsa85
Percentage of sleep time oxygen saturation (SaO2) is <= 85%
Percentage of sleep time oxygen saturation (SaO2) is <= 85%

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

Sleep/Polysomnography (PSG)/Oxygen Saturation (SaO2)
pctsa85h
Percentage of sleep time oxygen saturation (SaO2) is < 85%
Percentage of sleep time oxygen saturation (SaO2) is < 85%

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

Sleep/Polysomnography (PSG)/Oxygen Saturation (SaO2)
pctsa90
Percentage of sleep time oxygen saturation (SaO2) is <= 90%
Percentage of sleep time oxygen saturation (SaO2) is <= 90%

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

Sleep/Polysomnography (PSG)/Oxygen Saturation (SaO2)
pctsa90h
Percentage of sleep time oxygen saturation (SaO2) is < 90%
Percentage of sleep time oxygen saturation (SaO2) is < 90%

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

Sleep/Polysomnography (PSG)/Oxygen Saturation (SaO2)
pctsa92
Percentage of sleep time oxygen saturation (SaO2) is <= 92%
Percentage of sleep time oxygen saturation (SaO2) is <= 92%

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

Sleep/Polysomnography (PSG)/Oxygen Saturation (SaO2)
pctsa95
Percentage of sleep time oxygen saturation (SaO2) is <= 95%
Percentage of sleep time oxygen saturation (SaO2) is <= 95%

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

Sleep/Polysomnography (PSG)/Oxygen Saturation (SaO2)
pctsa95h
Percentage of sleep time oxygen saturation (SaO2) is < 95%
Percentage of sleep time oxygen saturation (SaO2) is < 95%

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

Sleep/Polysomnography (PSG)/Oxygen Saturation (SaO2)
sao2nrem
Average oxygen saturation (SaO2) non-rapid eye movement sleep (NREM)
Average oxygen saturation (SaO2) non-rapid eye movement sleep (NREM)

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

Sleep/Polysomnography (PSG)/Oxygen Saturation (SaO2)
sao2rem
Average oxygen saturation (SaO2) rapid eye movement sleep (REM)
Average oxygen saturation (SaO2) rapid eye movement sleep (REM)

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

Sleep/Polysomnography (PSG)/Oxygen Saturation (SaO2)
longap
Longest apnea
Longest apnea Sleep/Polysomnography (PSG)/Respiratory Events/Apnea
cardnba
Central apnea per hour with arousals (Non-rapid eye movement sleep (NREM), Supine, all desaturations)
Central apnea per hour with arousals (Non-rapid eye movement sleep (NREM), Supine, all desaturations) Sleep/Polysomnography (PSG)/Respiratory Events/Apnea/Central
cavgdur
Average central apnea length
Average central apnea length

duration (entire recording)

Sleep/Polysomnography (PSG)/Respiratory Events/Apnea/Central
hmanrop
Number of mixed apnea per hour (Non-rapid eye movement sleep (NREM), Non-supine, all desaturations)
Number of mixed apnea per hour (Non-rapid eye movement sleep (NREM), Non-supine, all desaturations) Sleep/Polysomnography (PSG)/Respiratory Events/Apnea/Mixed
oavgdur
Average obstructive apnea length
Average obstructive apnea length

duration (entire recording)

Sleep/Polysomnography (PSG)/Respiratory Events/Apnea/Obstructive
havgdur
Average hypopnea length
Average hypopnea length

duration (entire recording)

Sleep/Polysomnography (PSG)/Respiratory Events/Hypopnea
longhyp
Longest hypopnea
Longest hypopnea

(entire recording)

Sleep/Polysomnography (PSG)/Respiratory Events/Hypopnea
rdinba
Hypopnea per hour with arousals (Non-rapid eye movement sleep (NREM), Supine, all desaturations)
Hypopnea per hour with arousals (Non-rapid eye movement sleep (NREM), Supine, all desaturations) Sleep/Polysomnography (PSG)/Respiratory Events/Hypopnea
rdinba2
Hypopnea per hour with >=2% desaturation or arousal (Non-rapid eye movement sleep (NREM), Supine)
Hypopnea per hour with >=2% desaturation or arousal (Non-rapid eye movement sleep (NREM), Supine) Sleep/Polysomnography (PSG)/Respiratory Events/Hypopnea
rdinba3
Hypopnea per hour with >=3% desaturation or arousal (Non-rapid eye movement sleep (NREM), Supine)
Hypopnea per hour with >=3% desaturation or arousal (Non-rapid eye movement sleep (NREM), Supine) Sleep/Polysomnography (PSG)/Respiratory Events/Hypopnea
rdinbp
Hypopnea per hour (Non-rapid eye movement sleep (NREM), Supine, all desaturations)
Hypopnea per hour (Non-rapid eye movement sleep (NREM), Supine, all desaturations) Sleep/Polysomnography (PSG)/Respiratory Events/Hypopnea
rdinbp3
Hypopnea per hour (Non-rapid eye movement sleep (NREM), Supine, >=3% desaturation)
Hypopnea per hour (Non-rapid eye movement sleep (NREM), Supine, >=3% desaturation) Sleep/Polysomnography (PSG)/Respiratory Events/Hypopnea
rdinoa3
Hypopnea per hour with >=3% desaturation or arousal (Non-rapid eye movement sleep (NREM), Non-supine)
Hypopnea per hour with >=3% desaturation or arousal (Non-rapid eye movement sleep (NREM), Non-supine) Sleep/Polysomnography (PSG)/Respiratory Events/Hypopnea
rdinop
Hypopnea per hour (Non-rapid eye movement sleep (NREM), Non-supine, all desaturations)
Hypopnea per hour (Non-rapid eye movement sleep (NREM), Non-supine, all desaturations) Sleep/Polysomnography (PSG)/Respiratory Events/Hypopnea
rdinop3
Hypopnea per hour (Non-rapid eye movement sleep (NREM), Non-supine, >=3% desaturation)
Hypopnea per hour (Non-rapid eye movement sleep (NREM), Non-supine, >=3% desaturation) Sleep/Polysomnography (PSG)/Respiratory Events/Hypopnea
rdirba3
Hypopnea per hour with >=3% desaturation or arousal (Rapid eye movement sleep (REM), Supine)
Hypopnea per hour with >=3% desaturation or arousal (Rapid eye movement sleep (REM), Supine) Sleep/Polysomnography (PSG)/Respiratory Events/Hypopnea