CHAT Variables - Sleep Data - National Sleep Research Resource - NSRR

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	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	Clinical Data/Laboratory Tests
	crp_ug_ml C-reactive protein (CRP) levels	C-reactive protein (CRP) levels	Clinical Data/Laboratory Tests
	glucose_mmol Blood glucose levels	Blood glucose levels	Clinical Data/Laboratory Tests
	hdl_mg_dl Blood high-density lipoprotein (HDL) levels	Blood high-density lipoprotein (HDL) levels	Clinical Data/Laboratory Tests
	homa Homeostasis Model Assessment (HOMA) estimate of insulin resistance	Homeostasis Model Assessment (HOMA) estimate of insulin resistance	Clinical Data/Laboratory Tests
	insulin_uil_ml Blood insulin levels	Blood insulin levels	Clinical Data/Laboratory Tests
	ldl_mg_dl Blood low-density lipoprotein (LDL) levels	Blood low-density lipoprotein (LDL) levels	Clinical Data/Laboratory Tests
	sgl_mg_dl Serum glucose levels	Serum glucose levels	Clinical Data/Laboratory Tests
	trig Triglyceride levels	Triglyceride levels	Clinical Data/Laboratory Tests
	bri13b GEC (BRI + MI) T score	GEC (BRI + MI) T score From the Behavior Rating Inventory of Executive Function (BRIEF). Gioia G et al, 2010 Search for all BRIEF variables within this dataset	Clinical Data/Neurocognitive Testing/Behavior Rating Inventory of Executive Function(BRIEF)
	bri13b_tr MI T score	MI T score From the Behavior Rating Inventory of Executive Function (BRIEF). Gioia G et al, 2010 Search for all BRIEF variables within this dataset	Clinical Data/Neurocognitive Testing/Behavior Rating Inventory of Executive Function(BRIEF)/Teacher's Form
	nep10b_nepsy Core Domain Scores Attn / Exec Scaled Scores	Core Domain Scores Attn / Exec Scaled Scores	Clinical Data/Neurocognitive Testing/NEPSY
	bp41 Average systolic blood pressure	Average systolic blood pressure	Clinical Data/Vital Signs/Seated Blood Pressure
	bp42 Average diastolic blood pressure	Average diastolic blood pressure	Clinical Data/Vital Signs/Seated Blood Pressure
	ageyear_at_meas Child's age computed in years at time anthropometry were taken	Child's age computed in years at time anthropometry were taken	Demographics
	chi2 Child's gender	Child's gender	Demographics
	chi3 Child's ethnicity	Child's ethnicity	Demographics
	male Child's gender	Child's gender	Demographics
	race3 Child's race	Child's race	Demographics
	chi5 Child's grade	Child's grade	Demographics/Education
	nsrr_bmi Body mass index (BMI)	Body mass index (BMI) Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: ant5 at Baseline	Harmonized/Anthropometry
	nsrr_bp_diastolic Diastolic blood pressure	Diastolic blood pressure Average resting diastolic blood pressure of three measurements collected from the upper arm in a single clinic visit. In cases where either of the measurements was missing, the average was calculated discarding the missing value. Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: bp42	Harmonized/Clinical Data
	nsrr_bp_systolic Systolic blood pressure	Systolic blood pressure Average resting systolic blood pressure of three measurements collected from the upper arm in a single clinic visit. In cases where either of the measurements was missing, the average was calculated discarding the missing value. Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: bp41	Harmonized/Clinical Data
	nsrr_age Subject age	Subject age Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: ageyear_at_meas at Baseline	Harmonized/Demographics
	nsrr_age_gt89 Indicates whether the subject's age (in years) used during date obfuscation is greater than 89 years	Indicates whether the subject's age (in years) used during date obfuscation is greater than 89 years Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: ageyear_at_meas at Baseline	Harmonized/Demographics
	nsrr_ethnicity Subject ethnicity	Subject ethnicity Original missing value is recoded as "not reported". Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: chi3	Harmonized/Demographics
	nsrr_race Subject race	Subject race Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: ref4	Harmonized/Demographics
	nsrr_sex Subject sex	Subject sex Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: male	Harmonized/Demographics
	nsrr_ahi_hp3r_aasm07 Apnea-Hypopnea Index : (All apneas + hypopneas with >=50% nasal cannula [or alternative sensor] reduction and >= 3% oxygen desaturation or with arousal) / hour of sleep	Apnea-Hypopnea Index : (All apneas + hypopneas with >=50% nasal cannula [or alternative sensor] reduction and >= 3% oxygen desaturation or with arousal) / hour of sleep Harmonized by the NSRR team. The definition of hypopnea events is consistent with the American Academy of Sleep Medicine (AASM) 2007 Manual (alternative). [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] Refer to the source for detailed definition for respiratory events: ahi_a0h3a	Harmonized/Polysomnography/Apnea-Hypopnea Indices
	nsrr_ahi_hp3u Apnea-Hypopnea Index : (All apneas + hypopneas with >= 3% oxygen desaturation) / hour of sleep	Apnea-Hypopnea Index : (All apneas + hypopneas with >= 3% oxygen desaturation) / hour of sleep Harmonized by the NSRR team. Refer to the source for detailed definition for respiratory events: ahi_a0h3	Harmonized/Polysomnography/Apnea-Hypopnea Indices
	nsrr_ahi_hp4r Apnea-Hypopnea Index : (All apneas + hypopneas with >= 4% oxygen desaturation or with arousal) / hour of sleep	Apnea-Hypopnea Index : (All apneas + hypopneas with >= 4% oxygen desaturation or with arousal) / hour of sleep Harmonized by the NSRR team. Refer to the source for detailed definition for respiratory events: ahi_a0h4a	Harmonized/Polysomnography/Apnea-Hypopnea Indices
	nsrr_ahi_hp4u Apnea-Hypopnea Index : (All apneas + hypopneas with >= 4% oxygen desaturation) / hour of sleep	Apnea-Hypopnea Index : (All apneas + hypopneas with >= 4% oxygen desaturation) / hour of sleep Harmonized by the NSRR team. Refer to the source for detailed definition for respiratory events: ahi_a0h4	Harmonized/Polysomnography/Apnea-Hypopnea Indices
	nsrr_phrnumar_f1 Arousal Index: Number of arousals per hour of sleep from polysomnography	Arousal Index: Number of arousals per hour of sleep from polysomnography Harmonized by the NSRR team. Source: ai_all	Harmonized/Polysomnography/Arousal
	nsrr_flag_spsw 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.	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. Harmonized by the NSRR team. Source: slewake	Harmonized/Polysomnography/Signal Quality
	nsrr_ttldursp_f1 Total Sleep Duration: the interval between sleep onset and sleep offset while the participant is asleep from polysomnography	Total Sleep Duration: the interval between sleep onset and sleep offset while the participant is asleep from polysomnography Conventionally, this would be called total sleep time (TST) (i.e. total time spent in stage 1 or greater). Harmonized by the NSRR team. Source: slpprdp	Harmonized/Polysomnography/Sleep Architecture
	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/Administrative
	oxitype Oximeter type	Oximeter type 1 = Masimo, 2 = Nonin, 3 = Nonin Biologic	Sleep Monitoring/Polysomnography/Administrative
	stdydt Date of study	Date of study	Sleep Monitoring/Polysomnography/Administrative
	unittype Polysomnography (PSG) unit type	Polysomnography (PSG) unit type	Sleep Monitoring/Polysomnography/Administrative
	ahi_a0h3 Apnea-Hypopnea Index : (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) / hour of sleep from type I polysomnography	Apnea-Hypopnea Index : (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) / hour of sleep from type I polysomnography	Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
	ahi_a0h3a Apnea-Hypopnea Index : (Apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 3% oxygen desaturation or with arousal) / hour of sleep from type I polysomnography	Apnea-Hypopnea Index : (Apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 3% oxygen desaturation or with arousal) / hour of sleep 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/Apnea-Hypopnea Indices
	ahi_a0h4 Apnea-Hypopnea Index : (Apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 4% oxygen desaturation and with or without arousal) / hour of sleep from type I polysomnography	Apnea-Hypopnea Index : (Apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 4% oxygen desaturation and with or without arousal) / hour of sleep from type I polysomnography Calculated - Summary metric of sleep disordered breathing events.	Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
	ahi_a0h4a Apnea-Hypopnea Index : (Apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 4% oxygen desaturation or with arousal) / hour of sleep from type I polysomnography	Apnea-Hypopnea Index : (Apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 4% oxygen desaturation or with arousal) / hour of sleep from type I polysomnography Calculated - Summary metric of sleep disordered breathing events.	Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
	ahi_c0h3 Central Apnea-Hypopnea Index : (Central 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) / hour of sleep from type I polysomnography	Central Apnea-Hypopnea Index : (Central 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) / hour of sleep from type I polysomnography Calculated - Summary metric of sleep disordered breathing events.	Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
	ahi_c0h3a Central Apnea-Hypopnea Index : (Central apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 3% oxygen desaturation or with arousal) / hour of sleep from type I polysomnography	Central Apnea-Hypopnea Index : (Central apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 3% oxygen desaturation or with arousal) / hour of sleep 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/Apnea-Hypopnea Indices
	ahi_c0h4 Central Apnea-Hypopnea Index : (Central apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 4% oxygen desaturation and with or without arousal) / hour of sleep from type I polysomnography	Central Apnea-Hypopnea Index : (Central apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 4% oxygen desaturation and with or without arousal) / hour of sleep from type I polysomnography Calculated - Summary metric of sleep disordered breathing events.	Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
	ahi_c0h4a Central Apnea-Hypopnea Index : (Central apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 4% oxygen desaturation or with arousal) / hour of sleep from type I polysomnography	Central Apnea-Hypopnea Index : (Central apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 4% oxygen desaturation or with arousal) / hour of sleep from type I polysomnography Calculated - Summary metric of sleep disordered breathing events.	Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
	ahi_o0h3 Obstructive Apnea-Hypopnea Index : (Obstructive 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) / 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 > 50% flow reduction and >= 3% oxygen desaturation and with or without arousal) / hour of sleep from type I polysomnography Calculated - Summary metric of sleep disordered breathing events.	Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
	ahi_o0h3a Obstructive Apnea-Hypopnea Index : (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 3% oxygen desaturation or with 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 > 50% flow reduction and >= 3% oxygen desaturation or with arousal) / hour of sleep 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/Apnea-Hypopnea Indices
	ahi_o0h4 Obstructive Apnea-Hypopnea Index : (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 4% 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 > 50% flow reduction and >= 4% oxygen desaturation and with or without arousal) / hour of sleep from type I polysomnography Calculated - Summary metric of sleep disordered breathing events.	Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
	ahi_o0h4a Obstructive Apnea-Hypopnea Index : (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 4% oxygen desaturation or with 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 > 50% flow reduction and >= 4% oxygen desaturation or with arousal) / hour of sleep from type I polysomnography Calculated - Summary metric of sleep disordered breathing events.	Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
	cai0p Central Apnea Index : (Central apneas with no oxygen desaturation threshold used and with or without arousal) / hour of sleep from type I polysomnography	Central Apnea Index : (Central apneas with no oxygen desaturation threshold used and with or without arousal) / hour of sleep from type I polysomnography [(Total number of central apneas associated with all desaturations) / (hours of sleep)]. Will be missing if Total Sleep Time (TST) is 0.	Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
	cardnba Total number of central apnea in NREM sleep in supine position: Central apneas with no oxygen desaturation threshold used only with arousal from type I polysomnography	Total number of central apnea in NREM sleep in supine position: Central apneas with no oxygen desaturation threshold used only with arousal from type I polysomnography	Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
	hmanrop Mixed Apnea Index (NREM, Non-Supine): (Mixed apneas with no oxygen desaturation threshold used and with or without arousal) / hour of NREM sleep in non-supine position from type I polysomnography	Mixed Apnea Index (NREM, Non-Supine): (Mixed apneas with no oxygen desaturation threshold used 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
	omahi3 Childhood Adenotonsillectomy Trial (CHAT) Apnea-Hypopnea Index (AHI) - Obstructive and Mixed Apnea-Hypopnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ mixed apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 3% oxygen desaturation or arousal) / hour of sleep from type I polysomnography	Childhood Adenotonsillectomy Trial (CHAT) Apnea-Hypopnea Index (AHI) - Obstructive and Mixed Apnea-Hypopnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ mixed apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 3% oxygen desaturation or arousal) / hour of sleep 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/Apnea-Hypopnea Indices
	omahi3b Childhood Adenotonsillectomy Trial (CHAT) Apnea-Hypopnea Index (AHI) - Obstructive and Mixed Apnea-Hypopnea Index (Supine): (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ mixed apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 3% oxygen desaturation or arousal) / hour of sleep in supine position from type I polysomnography	Childhood Adenotonsillectomy Trial (CHAT) Apnea-Hypopnea Index (AHI) - Obstructive and Mixed Apnea-Hypopnea Index (Supine): (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ mixed apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 3% oxygen desaturation or arousal) / hour of sleep in supine position from type I polysomnography Calculated - Summary metric of sleep disordered breathing events. will be missing if Total Sleep Time (TST) is 0.	Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
	omahi3_change Childhood Adenotonsillectomy Trial (CHAT) Apnea-Hypopnea Index (AHI) change between Baseline and End	Childhood Adenotonsillectomy Trial (CHAT) Apnea-Hypopnea Index (AHI) change between Baseline and End	Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
	omahi3nr Childhood Adenotonsillectomy Trial (CHAT) Apnea-Hypopnea Index (AHI) - Obstructive and Mixed Apnea-Hypopnea Index (NREM): (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ mixed apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 3% oxygen desaturation or arousal) / hour of NREM sleep from type I polysomnography	Childhood Adenotonsillectomy Trial (CHAT) Apnea-Hypopnea Index (AHI) - Obstructive and Mixed Apnea-Hypopnea Index (NREM): (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ mixed apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 3% oxygen desaturation or arousal) / hour of NREM sleep from type I polysomnography Calculated - Summary metric of sleep disordered breathing events. will be missing if Total Sleep Time (TST) is 0.	Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
	omahi3o Childhood Adenotonsillectomy Trial (CHAT) Apnea-Hypopnea Index (AHI) - Obstructive and Mixed Apnea-Hypopnea Index (Non-Supine): (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ mixed apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 3% oxygen desaturation or arousal) / hour of sleep in non-supine position from type I polysomnography	Childhood Adenotonsillectomy Trial (CHAT) Apnea-Hypopnea Index (AHI) - Obstructive and Mixed Apnea-Hypopnea Index (Non-Supine): (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ mixed apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 3% oxygen desaturation or arousal) / hour of sleep in non-supine position from type I polysomnography Calculated - Summary metric of sleep disordered breathing events. will be missing if Total Sleep Time (TST) is 0.	Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
	omahi3r Childhood Adenotonsillectomy Trial (CHAT) Apnea-Hypopnea Index (AHI) - Obstructive and Mixed Apnea-Hypopnea Index (REM): (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ mixed apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 3% oxygen desaturation or arousal) / hour of REM sleep from type I polysomnography	Childhood Adenotonsillectomy Trial (CHAT) Apnea-Hypopnea Index (AHI) - Obstructive and Mixed Apnea-Hypopnea Index (REM): (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ mixed apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 3% oxygen desaturation or arousal) / hour of REM sleep from type I polysomnography Calculated - Summary metric of sleep disordered breathing events. will be missing if Total Sleep Time (TST) is 0.	Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
	omai0p Childhood Adenotonsillectomy Trial (CHAT) Obstructive and Mixed Apnea Index (AHI): (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ mixed apneas with no oxygen desaturation threshold used and with or without arousal) / hour of sleep from type I polysomnography	Childhood Adenotonsillectomy Trial (CHAT) Obstructive and Mixed Apnea Index (AHI): (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ mixed apneas with no oxygen desaturation threshold used and with or without arousal) / hour of sleep from type I polysomnography Calculated - Summary metric of sleep disordered breathing events.	Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
	rdim3p Apnea-Hypopnea Index: (Apneas with >= 3% oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and with >= 3% oxygen desaturation used and with or without arousal) / hour of sleep from type I polysomnography	Apnea-Hypopnea Index: (Apneas with >= 3% oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and with >= 3% oxygen desaturation used and with or without arousal) / hour of sleep from type I polysomnography [(total number of apneas and hypopneas associated with >= 3% desaturation) / (hours of sleep)]	Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
	rdim3pa Apnea-Hypopnea Index: (Apneas with >= 3% oxygen desaturation threshold used or with arousal+ hypopneas with > 50% flow reduction and with >= 3% oxygen desaturation used or with arousal) / hour of sleep from type I polysomnography	Apnea-Hypopnea Index: (Apneas with >= 3% oxygen desaturation threshold used or with arousal+ hypopneas with > 50% flow reduction and with >= 3% oxygen desaturation used or with arousal) / hour of sleep from type I polysomnography [(total number of apneas and hypopneas with >= 3% desaturation or arousal) / (hours of sleep)]	Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
	rdim3pns Apnea-Hypopnea Index (Non-Supine): (Apneas with >= 3% oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and with >= 3% oxygen desaturation used and with or without arousal) / hour of sleep in non-supine from type I polysomnography	Apnea-Hypopnea Index (Non-Supine): (Apneas with >= 3% oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and with >= 3% oxygen desaturation used and with or without arousal) / hour of sleep in non-supine from type I polysomnography [(total number of apneas and hypopneas in non-supine body position associated with >= 3% desaturation) / (hours of sleep)]. will be missing if no time non-supine or low position sensor quality.	Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
	rdim3ps Apnea-Hypopnea Index (Supine): (Apneas with >= 3% oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and with >= 3% oxygen desaturation used and with or without arousal) / hour of sleep in supine from type I polysomnography	Apnea-Hypopnea Index (Supine): (Apneas with >= 3% oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and with >= 3% oxygen desaturation used and with or without arousal) / hour of sleep in supine from type I polysomnography [(total number of apneas and hypopneas in supine body position associated with >= 3% desaturation) / (hours of sleep)]. will be missing if no time supine or low position sensor quality.	Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
	rdim4p Apnea-Hypopnea Index: (Apneas with >= 4% oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and with >= 4% oxygen desaturation used and with or without arousal) / hour of sleep from type I polysomnography	Apnea-Hypopnea Index: (Apneas with >= 4% oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and with >= 4% oxygen desaturation used and with or without arousal) / hour of sleep from type I polysomnography [(total number of apneas and hypopneas associated with >= 3% desaturation) / (hours of sleep)]	Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
	rdim4pa Apnea-Hypopnea Index: (Apneas with >= 4% oxygen desaturation threshold used or with arousal+ hypopneas with > 50% flow reduction and with >= 4% oxygen desaturation used or with arousal) / hour of sleep from type I polysomnography	Apnea-Hypopnea Index: (Apneas with >= 4% oxygen desaturation threshold used or with arousal+ hypopneas with > 50% flow reduction and with >= 4% oxygen desaturation used or with arousal) / hour of sleep from type I polysomnography [(total number of apneas and hypopneas with >= 3% desaturation or arousal) / (hours of sleep)]	Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
	rdinba Hypopnea Index (NREM, Supine) : (Hypopneas with > 50% flow reduction and with no oxygen desaturation threshold used only with arousal) / hour of NREM sleep in supine position from type I polysomnography	Hypopnea Index (NREM, Supine) : (Hypopneas with > 50% flow reduction and with no oxygen desaturation threshold used only with arousal) / hour of NREM sleep in supine position from type I polysomnography Calculated - Summary metric of sleep disordered breathing events.	Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
	rdinba2 Hypopnea Index (NREM, Supine) : (Hypopneas with > 50% flow reduction and with >= 2% oxygen desaturation or with arousal) / hour of NREM sleep in supine position from type I polysomnography	Hypopnea Index (NREM, Supine) : (Hypopneas with > 50% flow reduction and with >= 2% oxygen desaturation or with arousal) / hour of NREM sleep in supine position from type I polysomnography Calculated - Summary metric of sleep disordered breathing events.	Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
	rdinba3 Hypopnea Index (NREM, Supine) : (Hypopneas with > 50% flow reduction and with >= 3% oxygen desaturation or with arousal) / hour of NREM sleep in supine position from type I polysomnography	Hypopnea Index (NREM, Supine) : (Hypopneas with > 50% flow reduction and with >= 3% oxygen desaturation or with arousal) / hour of NREM sleep in supine position from type I polysomnography Calculated - Summary metric of sleep disordered breathing events.	Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
	rdinbp Hypopnea Index (NREM, Supine) : (Hypopneas with > 50% flow reduction and with no oxygen desaturation threshold used and with or without arousal) / hour of NREM sleep in supine position from type I polysomnography	Hypopnea Index (NREM, Supine) : (Hypopneas with > 50% flow reduction and with no oxygen desaturation threshold used and with or without arousal) / hour of NREM sleep in supine position from type I polysomnography Calculated - Summary metric of sleep disordered breathing events.	Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
	rdinbp3 Hypopnea Index (NREM, Supine) : (Hypopneas with > 50% flow reduction and with >= 3% oxygen desaturation and with or without arousal) / hour of NREM sleep in supine position from type I polysomnography	Hypopnea Index (NREM, Supine) : (Hypopneas with > 50% flow reduction and with >= 3% oxygen desaturation and with or without arousal) / hour of NREM sleep in supine position from type I polysomnography Calculated - Summary metric of sleep disordered breathing events.	Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
	rdinoa3 Hypopnea Index (NREM, Non-Supine) : (Hypopneas with > 50% flow reduction and with >= 3% oxygen desaturation or with arousal) / hour of NREM sleep in non-supine position from type I polysomnography	Hypopnea Index (NREM, Non-Supine) : (Hypopneas with > 50% flow reduction and with >= 3% oxygen desaturation or with 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
	rdinop Hypopnea Index (NREM, Non-Supine) : (Hypopneas with > 50% flow reduction and with no oxygen desaturation threshold used and with or without arousal) / hour of NREM sleep in non-supine position from type I polysomnography	Hypopnea Index (NREM, Non-Supine) : (Hypopneas with > 50% flow reduction and with no oxygen desaturation threshold used 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
	rdinop3 Hypopnea Index (NREM, 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 (NREM, 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
	rdirba3 Hypopnea Index (REM, Supine): (Hypopneas with > 50% flow reduction and with >= 3% oxygen desaturation or with arousal) / hour of REM sleep in supine position from type I polysomnography	Hypopnea Index (REM, Supine): (Hypopneas with > 50% flow reduction and with >= 3% oxygen desaturation or with arousal) / hour of REM sleep in supine position from type I polysomnography Calculated - Summary metric of sleep disordered breathing events.	Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
	rdirbp Hypopnea Index (REM, Supine) : (Hypopneas with > 50% flow reduction and with no oxygen desaturation threshold used and with or without arousal) / hour of REM sleep in supine position from type I polysomnography	Hypopnea Index (REM, Supine) : (Hypopneas with > 50% flow reduction and with no oxygen desaturation threshold used and with or without arousal) / hour of REM sleep in supine position from type I polysomnography Calculated - Summary metric of sleep disordered breathing events.	Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
	rdirbp3 Hypopnea Index (REM, Supine) : (Hypopneas with > 50% flow reduction and with >= 3% oxygen desaturation and with or without arousal) / hour of NREM sleep in supine position from type I polysomnography	Hypopnea Index (REM, Supine) : (Hypopneas with > 50% flow reduction and with >= 3% oxygen desaturation and with or without arousal) / hour of NREM sleep in supine position from type I polysomnography Calculated - Summary metric of sleep disordered breathing events.	Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
	rdiroa Hypopnea Index (REM, Non-Supine) : (Hypopneas with > 50% flow reduction and with no oxygen desaturation threshold used only with 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 only with 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
	rdiroa3 Hypopnea Index (REM, Non-Supine): (Hypopneas with > 50% flow reduction and with >= 3% oxygen desaturation or with 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 >= 3% oxygen desaturation or with 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
	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/Arousal
	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/Arousal
	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/Arousal
	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