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Childhood Adenotonsillectomy Trial

Name Label Folder
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 (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]

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_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: stloutp

Harmonized/Polysomnography/Sleep Architecture
nsrr_begtimsp_f1
Sleep onset time from polysomnography
Sleep onset time from polysomnography

Harmonized by the NSRR team. Source: stonsetp

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: 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: 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: 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: 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: 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: timebedp

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: slpprdp

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: remlaiip

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: slpeffp

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: slplatp

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: remlaip

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: waso

Harmonized/Polysomnography/Sleep Architecture