Name	Label	Folder
nsrr_age Subject age	Subject age Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: mat_age	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: mat_age	Harmonized/Demographics
nsrr_race Subject race	Subject race Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: mat_race	Harmonized/Demographics
nsrr_sex Subject sex	Subject sex Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: Study Design Inclusion Criteria	Harmonized/Demographics
nsrr_current_smoker Currently smoking cigarettes	Currently smoking cigarettes Indicates whether subject regularly smokes cigarettes. Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: Study Design Inclusion Criteria	Harmonized/Lifestyle and Behavioral Health
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 definitions of respiratory events: ahi1	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 definitions of respiratory events: ahi2	Harmonized/Polysomnography/Apnea-Hypopnea Indices
nsrr_effsp_f1 Sleep Efficiency: the ratio of total sleep duration (i.e., total sleep time) to in-bed period (i.e., time in bed) from polysomnography	Sleep Efficiency: the ratio of total sleep duration (i.e., total sleep time) to in-bed period (i.e., time in bed) from polysomnography Harmonized by the NSRR team. Sleep duration is the interval between sleep onset time and lights on/out-bed time while asleep (i.e. total sleep time, TST), while in-bed period is the interval between lights off/in-bed time and lights on/out-bed time (i.e. time in bed, TIB). Percentage of time in bed that was spent sleeping, or the ratio of total sleep time to total time in bed, expressed as a percentage. Source variable: se	Harmonized/Polysomnography/Sleep Architecture
nsrr_pctdursp_s3_f1 Percentage of total sleep duration (i.e., total sleep time, TST) in Stage 3/4 from type I polysomnography	Percentage of total sleep duration (i.e., total sleep time, TST) in Stage 3/4 from type I polysomnography Harmonized by the NSRR team. Refer to the source for detailed definitions of respiratory events: tstdeep	Harmonized/Polysomnography/Sleep Architecture
nsrr_pctdursp_sr_f1 Percentage of total sleep duration (i.e., total sleep time, TST) in REM sleep from type I polysomnography	Percentage of total sleep duration (i.e., total sleep time, TST) in REM sleep from type I polysomnography Harmonized by the NSRR team. Refer to the source for detailed definitions of respiratory events: tstrem	Harmonized/Polysomnography/Sleep Architecture
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: tst	Harmonized/Polysomnography/Sleep Architecture

Maternal Sleep in Pregnancy and the Fetus