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Multi-Ethnic Study of Atherosclerosis

Name Label Folder
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: 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_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: 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_all5

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: slewake5

Harmonized/Polysomnography/Signal Quality
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: timest1p5

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: timest2p5

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: times34p5

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: timeremp5

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: time_bed5

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

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: slpprdp5

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: remlaiip5

Harmonized/Polysomnography/Sleep Architecture
nsrr_ttleffsp_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. Source: slp_eff5

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: slp_lat5

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: slp_maint_eff5

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: rem_lat15

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: waso5

Harmonized/Polysomnography/Sleep Architecture