Name	Label	Folder
nsrr_bmi Body mass index (BMI)	Body mass index (BMI) Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: anthro_bmi	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: anthro_bp_dia_avg123	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: anthro_bp_sys_avg123	Harmonized/Clinical Data
nsrr_age Subject age	Subject age Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: anthro_age	Harmonized/Demographic
nsrr_ethnicity Subject ethnicity	Subject ethnicity Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: demo_ethnicity	Harmonized/Demographic
nsrr_race Subject race	Subject race Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: demo_race	Harmonized/Demographic
nsrr_sex Subject sex	Subject sex Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: demo_sex	Harmonized/Demographic
nsrr_ahi_hp3r_aasm15 Apnea-Hypopnea Index : (All apneas + hypopneas with >=30% nasal cannula [or alternative sensor] reduction and >= 3% oxygen desaturation or with arousal) / hour of sleep	Apnea-Hypopnea Index : (All apneas + hypopneas with >=30% nasal cannula [or alternative sensor] reduction and >= 3% oxygen desaturation or with arousal) / hour of sleep Harmonized by the NSRR team. The definition for hypopneas is consistent with the following clinical guidelines: (1) American Academy of Sleep Medicine (AASM) 2007 Manual (2012 update) (recommended). Berry RB et al. 2012 (PubMed ID:23066376), and (2) American Academy of Sleep Medicine (AASM) 2015 (recommended) [Berry RB et al. The AASM Manual for the Scoring of Sleep and Associated Events: Rules, Terminology and Technical Specifications, Version 2.2. American Academy of Sleep Medicine, Darien, IL, 2015.] Refer to the source for detailed definition for respiratory events: psg_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: psg_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: psg_ahi_a0h4a	Harmonized/Polysomnography/Apnea-Hypopnea Indices
nsrr_ahi_hp4u_aasm15 Apnea-Hypopnea Index : (All apneas + hypopneas with >=30% nasal cannula [or alternative sensor] reduction with >= 4% oxygen desaturation) / hour of sleep	Apnea-Hypopnea Index : (All apneas + hypopneas with >=30% nasal cannula [or alternative sensor] reduction with >= 4% oxygen desaturation) / hour of sleep Harmonized by the NSRR team. The definition of hypopnea events is consistent with the following clinical guidelines: (1) AASM 2012 update (alternative) Berry RB et al. 2012 (PubMed ID:23066376), and (2) AASM 2015 (acceptable) [Berry RB et al. The AASM Manual for the Scoring of Sleep and Associated Events: Rules, Terminology and Technical Specifications, Version 2.2. American Academy of Sleep Medicine, Darien, IL, 2015.]. Refer to the source for detailed definition for respiratory events: psg_ahi_a0h4	Harmonized/Polysomnography/Apnea-Hypopnea Indices
nsrr_cai Central Apnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal) / hour of sleep	Central Apnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal) / hour of sleep Harmonized by the NSRR team. Source: psg_cai0p	Harmonized/Polysomnography/Apnea-Hypopnea Indices
nsrr_oahi_hp3r_aasm15 Obstructive Apnea-Hypopnea Index : (Obstructive apneas + hypopneas with >=30% nasal cannula [or alternative sensor] reduction and >=3% oxygen desaturation or with arousal) / hour of sleep	Obstructive Apnea-Hypopnea Index : (Obstructive apneas + hypopneas with >=30% nasal cannula [or alternative sensor] reduction and >=3% oxygen desaturation or with arousal) / hour of sleep Harmonized by the NSRR team. The definition for hypopneas is consistent with the following clinical guidelines: (1) American Academy of Sleep Medicine (AASM) 2007 Manual (2012 update) (recommended). Berry RB et al. 2012 (PubMed ID:23066376), and (2) American Academy of Sleep Medicine (AASM) 2015 (recommended) [Berry RB et al. The AASM Manual for the Scoring of Sleep and Associated Events: Rules, Terminology and Technical Specifications, Version 2.2. American Academy of Sleep Medicine, Darien, IL, 2015.] Refer to the source for detailed definition for respiratory events: psg_ahi_o0h3a	Harmonized/Polysomnography/Apnea-Hypopnea Indices
nsrr_oahi_hp3u Obstructive Apnea-Hypopnea Index : (Obstructive apneas + hypopneas with >= 3% oxygen desaturation) / hour of sleep	Obstructive Apnea-Hypopnea Index : (Obstructive apneas + hypopneas with >= 3% oxygen desaturation) / hour of sleep Harmonized by the NSRR team. Source: psg_oahi3	Harmonized/Polysomnography/Apnea-Hypopnea Indices
nsrr_oahi_hp3u_pb Obstructive Apnea-Hypopnea Index for supine sleep: (Obstructive apneas + hypopneas with >= 3% oxygen desaturation) / hour of sleep in supine position	Obstructive Apnea-Hypopnea Index for supine sleep: (Obstructive apneas + hypopneas with >= 3% oxygen desaturation) / hour of sleep in supine position Harmonized by the NSRR team. Source: psg_ahi_o0h3_supine	Harmonized/Polysomnography/Apnea-Hypopnea Indices
nsrr_oahi_hp3u_po Obstructive Apnea-Hypopnea Index for non-supine sleep: (Obstructive apneas + hypopneas with >= 3% oxygen desaturation) / hour of sleep in non-supine position	Obstructive Apnea-Hypopnea Index for non-supine sleep: (Obstructive apneas + hypopneas with >= 3% oxygen desaturation) / hour of sleep in non-supine position Harmonized by the NSRR team. Source: psg_ahi_o0h3_nonsupine	Harmonized/Polysomnography/Apnea-Hypopnea Indices
nsrr_oahi_hp3u_sn Obstructive Apnea-Hypopnea Index for NREM sleep: (Obstructive apneas + hypopneas with >= 3% oxygen desaturation) / hour of NREM sleep	Obstructive Apnea-Hypopnea Index for NREM sleep: (Obstructive apneas + hypopneas with >= 3% oxygen desaturation) / hour of NREM sleep Harmonized by the NSRR team. Source: psg_ahi_o0h3_nrem	Harmonized/Polysomnography/Apnea-Hypopnea Indices
nsrr_oahi_hp3u_sr Obstructive Apnea-Hypopnea Index for REM sleep: (Obstructive apneas + hypopneas with >= 3% oxygen desaturation) / hour of REM sleep	Obstructive Apnea-Hypopnea Index for REM sleep: (Obstructive apneas + hypopneas with >= 3% oxygen desaturation) / hour of REM sleep Harmonized by the NSRR team. Source: psg_ahi_o0h3_rem	Harmonized/Polysomnography/Apnea-Hypopnea Indices
nsrr_oahi_hp4u Obstructive Apnea-Hypopnea Index : (Obstructive apneas + hypopneas with >= 4% oxygen desaturation) / hour of sleep	Obstructive Apnea-Hypopnea Index : (Obstructive apneas + hypopneas with >= 4% oxygen desaturation) / hour of sleep Harmonized by the NSRR team. Source: psg_oahi4	Harmonized/Polysomnography/Apnea-Hypopnea Indices
nsrr_oahi_hp4u_pb Obstructive Apnea-Hypopnea Index for supine sleep: (Obstructive apneas + hypopneas with >= 4% oxygen desaturation) / hour of sleep in supine position	Obstructive Apnea-Hypopnea Index for supine sleep: (Obstructive apneas + hypopneas with >= 4% oxygen desaturation) / hour of sleep in supine position Harmonized by the NSRR team. Source: psg_ahi_o0h4_supine	Harmonized/Polysomnography/Apnea-Hypopnea Indices
nsrr_oahi_hp4u_po Obstructive Apnea-Hypopnea Index for non-supine sleep: (Obstructive apneas + hypopneas with >= 4% oxygen desaturation) / hour of sleep in non-supine position	Obstructive Apnea-Hypopnea Index for non-supine sleep: (Obstructive apneas + hypopneas with >= 4% oxygen desaturation) / hour of sleep in non-supine position Harmonized by the NSRR team. Source: psg_ahi_o0h4_nonsupine	Harmonized/Polysomnography/Apnea-Hypopnea Indices
nsrr_oahi_hp4u_sn Obstructive Apnea-Hypopnea Index for NREM sleep: (Obstructive apneas + hypopneas with >= 4% oxygen desaturation) / hour of NREM sleep	Obstructive Apnea-Hypopnea Index for NREM sleep: (Obstructive apneas + hypopneas with >= 4% oxygen desaturation) / hour of NREM sleep Harmonized by the NSRR team. Source: psg_ahi_o0h4_nrem	Harmonized/Polysomnography/Apnea-Hypopnea Indices
nsrr_oahi_hp4u_sr Obstructive Apnea-Hypopnea Index for REM sleep: (Obstructive apneas + hypopneas with >= 4% oxygen desaturation) / hour of REM sleep	Obstructive Apnea-Hypopnea Index for REM sleep: (Obstructive apneas + hypopneas with >= 4% oxygen desaturation) / hour of REM sleep Harmonized by the NSRR team. Source: psg_ahi_o0h4_rem	Harmonized/Polysomnography/Apnea-Hypopnea Indices
nsrr_oai Obstructive Apnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal) / hour of sleep	Obstructive Apnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal) / hour of sleep Harmonized by the NSRR team. Source: psg_oai0p	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: psg_ai_all	Harmonized/Polysomnography/Arousal
nsrr_avglvlsa Average oxygen saturation in sleep	Average oxygen saturation in sleep Harmonized by the NSRR team. Source: psg_avgsat	Harmonized/Polysomnography/Oxygen Saturation
nsrr_minlvlsa Minimum oxygen saturation in sleep	Minimum oxygen saturation in sleep Harmonized by the NSRR team. Source: psg_minsat	Harmonized/Polysomnography/Oxygen Saturation
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: psg_scored_sleep_wake_only	Harmonized/Polysomnography/Signal Quality
nsrr_begtimbd_f1 Lights-out or In-bed clock time from polysomnography	Lights-out or In-bed clock time from polysomnography Conventionally, this variable would be called the start of time in bed (TIB). Harmonized by the NSRR team. Source: psg_scloutp	Harmonized/Polysomnography/Sleep Architecture
nsrr_begtimsp_f1 Sleep onset time from polysomnography	Sleep onset time from polysomnography Harmonized by the NSRR team. Source: psg_stonset1	Harmonized/Polysomnography/Sleep Architecture
nsrr_endtimbd_f1 Lights-on or out-bed clock time from polysomnography	Lights-on or out-bed clock time from polysomnography Conventionally, this variable would be called the end of time in bed (TIB). In this dataset, it concurs with the last epoch of sleep. Harmonized by the NSRR team. Source: psg_stlonp	Harmonized/Polysomnography/Sleep Architecture
nsrr_pctdursp_s1 Percentage of total sleep duration (i.e., total sleep time, TST) in stage 1 from polysomnography	Percentage of total sleep duration (i.e., total sleep time, TST) in stage 1 from polysomnography Harmonized by the NSRR team. Source: psg_timest1p	Harmonized/Polysomnography/Sleep Architecture
nsrr_pctdursp_s2 Percentage of total sleep duration (i.e., total sleep time, TST) in stage 2 from polysomnography	Percentage of total sleep duration (i.e., total sleep time, TST) in stage 2 from polysomnography Harmonized by the NSRR team. Source: psg_timest2p	Harmonized/Polysomnography/Sleep Architecture
nsrr_pctdursp_s3 Percentage of total sleep duration (i.e., total sleep time, TST) in stage 3/4 from polysomnography	Percentage of total sleep duration (i.e., total sleep time, TST) in stage 3/4 from polysomnography Harmonized by the NSRR team. Source: psg_times34p	Harmonized/Polysomnography/Sleep Architecture
nsrr_pctdursp_sr Percentage of total sleep duration (i.e., total sleep time, TST) in REM from polysomnography	Percentage of total sleep duration (i.e., total sleep time, TST) in REM from polysomnography Harmonized by the NSRR team. Source: psg_timeremp	Harmonized/Polysomnography/Sleep Architecture
nsrr_tib_f1 Total In-bed Period: the interval between lights off/in-bed time and lights on/out-bed time from polysomnography	Total In-bed Period: the interval between lights off/in-bed time and lights on/out-bed time from polysomnography Harmonized by the NSRR team. Conventionally, this would be called time in bed (TIB) Source: psg_time_bed	Harmonized/Polysomnography/Sleep Architecture
nsrr_tst_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 Harmonized by the NSRR team. Conventionally, this would be called total sleep time (TST) (i.e. total time spent in stage 1 or greater). Source: psg_slp_time	Harmonized/Polysomnography/Sleep Architecture
nsrr_ttldursp_s1sr REM Sleep Latency: the interval between the first sleep epoch and REM sleep excluding wake	REM Sleep Latency: the interval between the first sleep epoch and REM sleep excluding wake Harmonized by the NSRR team. Source: psg_rem_lat2	Harmonized/Polysomnography/Sleep Architecture
nsrr_ttleffsp_f1 Sleep Efficiency: the ratio of sleep duration (i.e., total sleep time) to in-bed period from polysomnography	Sleep Efficiency: the ratio of sleep duration (i.e., total sleep time) to in-bed period from polysomnography Harmonized by the NSRR team. Source: psg_slp_eff	Harmonized/Polysomnography/Sleep Architecture
nsrr_ttllatsp_f1 Sleep Latency: the interval between lights-out/in-bed time and sleep onset from polysomnography	Sleep Latency: the interval between lights-out/in-bed time and sleep onset from polysomnography Harmonized by the NSRR team. Source: psg_slp_lat	Harmonized/Polysomnography/Sleep Architecture
nsrr_ttlmefsp_f1 Sleep Maintenance Efficiency: the proportion of total sleep duration (i.e., total sleep time) in sleep period (i.e., interval between sleep onset and offset including wake) from polysomnography	Sleep Maintenance Efficiency: the proportion of total sleep duration (i.e., total sleep time) in sleep period (i.e., interval between sleep onset and offset including wake) from polysomnography Harmonized by the NSRR team. Source: psg_slp_maint_eff	Harmonized/Polysomnography/Sleep Architecture
nsrr_ttlprdsp_f1 Total Sleep Period: the interval between sleep onset time and sleep offset time from polysomnography	Total Sleep Period: the interval between sleep onset time and sleep offset time from polysomnography Harmonized by the NSRR team. Source: psg_slp_period	Harmonized/Polysomnography/Sleep Architecture
nsrr_ttlprdsp_s1sr REM Sleep Latency: the interval between the first sleep epoch and REM sleep including wake	REM Sleep Latency: the interval between the first sleep epoch and REM sleep including wake Harmonized by the NSRR team. Source: psg_rem_lat1	Harmonized/Polysomnography/Sleep Architecture
nsrr_waso_f1 Wake After Sleep Onset: the total duration being awake between sleep onset and lights-on/out-bed time from polysomnography	Wake After Sleep Onset: the total duration being awake between sleep onset and lights-on/out-bed time from polysomnography Harmonized by the NSRR team. Source: psg_waso	Harmonized/Polysomnography/Sleep Architecture

Pediatric Adenotonsillectomy Trial of Snoring