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Nulliparous Pregnancy Outcomes Study Monitoring Mothers-to-be

Name Label Folder
nsrr_ahi_hp3u
Apnea-Hypopnea Index : (All apneas + hypopneas with >= 3% oxygen desaturation) / hour of estimated sleep
Apnea-Hypopnea Index : (All apneas + hypopneas with >= 3% oxygen desaturation) / hour of estimated sleep

Harmonized by the NSRR team.

Data collected with no EEGs. Refer to the source for detailed definition for respiratory events: ahi_ap0nhp3x3n_f1t3

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 estimated sleep
Apnea-Hypopnea Index : (All apneas + hypopneas with >=30% nasal cannula [or alternative sensor] reduction with >= 4% oxygen desaturation) / hour of estimated 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.].

Data collected with no EEGs. Refer to the source for detailed definition for respiratory events: ahi_ap0nhp3x4n_f1t3

Harmonized/Polysomnography/Apnea-Hypopnea Indices
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.

Data collected with no EEGs. Source: ttldursp_f1t3

Harmonized/Polysomnography/Sleep Architecture