Name | Label | Folder | |
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overall_shhs2
Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Overall signal quality
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Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Overall signal quality
Overall study grade as assigned by scorer. These codes reflected the total duration of useable (artifact free, scorable) signals during sleep time across channels, weighing those signals most critical for accurate scoring of respiratory events and staging during sleep time. The Quality Assessment Form for SHHS2 was modified so that the overall quality grade and the signal quality codes were based on signals during sleep time. Since events were only scored during sleep time this provided a more accurate assessment of signal quality during the actual time or scoring. This change would only have affected the quality grade of a small number of studies in SHHS1 where there was a significant amount of time awake with very good signals combined with very poor signals that occurred during sleep. The overall and signal quality grades are comparable between SHHS1 and SHHS2. |
Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 | |
alpdel
Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Alpha Intrusion
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Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Alpha Intrusion
Scorer observed alpha intrusion on sleep during study. |
Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 | |
apnhyppr
Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Apnea/Hypopnea scoring problems
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Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Apnea/Hypopnea scoring problems
Due to signal problems, scorer was unable to reliably distinguish between apnea and hypopnea events. The distinction between apnea and hypopnea was determined to be unreliable. |
Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 | |
aroign
Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Arousals Ignored
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Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Arousals Ignored
Due to problems with EEG signals, arousals were ignored in scoring. |
Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 | |
aropr
Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Problems with arousals
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Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Problems with arousals
Scorer noted that there was a problem scoring arousals. |
Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 | |
arunrel
Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Arousals unreliable
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Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Arousals unreliable
Due to signal problems, scorer was unable to reliably assess arousals. The scoring of arousals was determined to be unreliable. |
Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 | |
comm
Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Signal Quality comments
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Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Signal Quality comments
Scorer comments on signal quality issues observed. |
Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 | |
csbre
Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Periodic breathing (10 minutes)
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Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Periodic breathing (10 minutes)
Scorer observed periodic breathing for a period of at least 10 minutes during study. |
Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 | |
lagbreath
Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Periodic large breaths
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Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Periodic large breaths
Scorer observed periodic large breaths during study. When very large breaths (one or two) occur periodically (mostly on the inductance channels) between runs of fairly normal breaths for a duration of at least 10 minutes. |
Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 | |
ligh
Was the light sensor calibrated appropriately?
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Was the light sensor calibrated appropriately?
Sleep Heart Health Study Visit 2 (SHHS2)- Lights are considered to have been calibrated appropriately if, at any time during the study, there is a clear transition (on recorded lights) from lights on to lights off. Otherwise, lights are considered not appropriate (including a light channel showing: no change throughout the study, reversed calibration and/or constant fluctuation from on to off throughout the study.) On studies with clear, but multiple, light transitions "lights off" will be marked at the first "off" transition that is maintained for at least 30 minutes. Light calibration will be considered reliable, but sleep latency will be unreliable. This method will be employed for all studies with the only exception being when onset of sleep occurs prior to the light change, in which "lights off" will be set at the onset of sleep. |
Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 | |
losbeg
Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Data Lost at beginning of study
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Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Data Lost at beginning of study
Data was lost at the beginning of study due to unscorable signals. Variable not used for Sleep Heart Health Study Visit 1 (SHHS1) |
Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 | |
losdur
Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Data Lost during study
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Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Data Lost during study
Data was lost during the study. |
Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 | |
losend
Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Data Lost at end of study
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Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Data Lost at end of study
Data was lost at end of study due to unscorable signals. |
Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 | |
maxresou
Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Long respiratory events verified
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Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Long respiratory events verified
If a respiratory event greater than 150 seconds in duration was observed, scorer has verified that this value is real. |
Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 | |
otherou
Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Other outlier
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Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Other outlier
Scorer observed other outlying values. |
Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 | |
period
Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Periodic breathing (5 min)
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Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Periodic breathing (5 min)
Scorer observed periodic breathing for a period of at least 5 minutes during study. |
Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 | |
posn
Was the position sensor working properly?
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Was the position sensor working properly?
Sleep Heart Health Study Visit 2 (SHHS2)- This sensor will be considered to have been calibrated appropriately if changes in position are visualized during the recording. 0=reliable. No variable available for Sleep Heart Health Study Visit 1 (SHHS1). |
Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 | |
posqual
Quality of the position signal
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Quality of the position signal
Sleep Heart Health Study Visit 2 (SHHS2)-These vary from 1 (poorest) to 5 (best) and reflect the proportion of sleep time the signals were useable. |
Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 | |
quabdo
Quality of the abdominal signal
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Quality of the abdominal signal
Sleep Heart Health Study Visit 2 (SHHS2)-These vary from 1 (poorest) to 5 (best) and reflect the proportion of sleep time the signals were useable. Useable respiratory data is defined as the number of hours that abnormal breaths can be distinguished from normal breaths. |
Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 | |
quair
Quality of the airflow signal
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Quality of the airflow signal
Sleep Heart Health Study Visit 2 (SHHS2)-These vary from 1 (poorest) to 5 (best) and reflect the proportion of sleep time the signals were useable. Useable respiratory data is defined as the number of hours that abnormal breaths can be distinguished from normal breaths. |
Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 | |
quchest
Quality of the thoracic signal
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Quality of the thoracic signal
Sleep Heart Health Study Visit 2 (SHHS2)-These vary from 1 (poorest) to 5 (best) and reflect the proportion of sleep time the signals were useable. Useable respiratory data is defined as the number of hours that abnormal breaths can be distinguished from normal breaths. |
Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 | |
quchin
Quality of the chin signal
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Quality of the chin signal
Sleep Heart Health Study Visit 2 (SHHS2)-These vary from 1 (poorest) to 5 (best) and reflect the proportion of sleep time the signals were useable. EEG/EOG/EMG data are defined by the number of hours that sleep stages can be distinguished from awake. |
Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 | |
queeg1
Quality of the EEG1 signal
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Quality of the EEG1 signal
Sleep Heart Health Study Visit 2 (SHHS2)-These vary from 1 (poorest) to 5 (best) and reflect the proportion of sleep time the signals were useable. EEG/EOG/EMG data are defined by the number of hours that sleep stages can be distinguished from awake. |
Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 | |
queeg2
Quality of the EEG2 signal
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Quality of the EEG2 signal
Sleep Heart Health Study Visit 2 (SHHS2)-These vary from 1 (poorest) to 5 (best) and reflect the proportion of sleep time the signals were useable. EEG/EOG/EMG data are defined by the number of hours that sleep stages can be distinguished from awake. |
Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 | |
queogl
Quality of the EOGL signal
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Quality of the EOGL signal
Sleep Heart Health Study Visit 2 (SHHS2)-These vary from 1 (poorest) to 5 (best) and reflect the proportion of sleep time the signals were useable. EEG/EOG/EMG data are defined by the number of hours that sleep stages can be distinguished from awake. |
Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 | |
queogr
Quality of the EOGR signal
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Quality of the EOGR signal
Sleep Heart Health Study Visit 2 (SHHS2)-These vary from 1 (poorest) to 5 (best) and reflect the proportion of sleep time the signals were useable. EEG/EOG/EMG data are defined by the number of hours that sleep stages can be distinguished from awake. |
Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 | |
quhr
Quality of the heart rate signal
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Quality of the heart rate signal
Sleep Heart Health Study Visit 2 (SHHS2)-These vary from 1 (poorest) to 5 (best) and reflect the proportion of sleep time the signals were useable. |
Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 | |
quoxim
Quality of the oximetry signal
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Quality of the oximetry signal
Sleep Heart Health Study Visit 2 (SHHS2)-These vary from 1 (poorest) to 5 (best) and reflect the proportion of sleep time the signals were useable. Useable respiratory data is defined as the number of hours that abnormal breaths can be distinguished from normal breaths. |
Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 | |
rdi0ou
Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Respiratory Disturbance Index (RDI)=0 real
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Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Respiratory Disturbance Index (RDI)=0 real
If Respiratory Disturbance Index (RDI) = 0, scorer has verified that this value is real. |
Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 | |
recafsle
Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Data Lost - Recording began after sleep
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Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Data Lost - Recording began after sleep
Data was lost at the beginning of sleep period because recording began after sleep onset. |
Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 | |
recbeaw
Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Data Lost - Recording ended before wake
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Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Data Lost - Recording ended before wake
Data was lost at the end of sleep period because recording ended before wake. |
Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 | |
remarunrel
Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Arousals unreliable (Rapid eye movement sleep (REM))
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Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Arousals unreliable (Rapid eye movement sleep (REM))
Due to signal problems, scorer was unable to reliably assess arousals in stage rapid eye movement sleep (REM). The scoring of arousals in stage rapid eye movement sleep (REM) was determined to be unreliable. |
Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 | |
remnrempr
Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): rapid eye movement sleep (REM)/non-rapid eye movement sleep (NREM) Scoring unreliable
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Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): rapid eye movement sleep (REM)/non-rapid eye movement sleep (NREM) Scoring unreliable
Scorer noted that there was a problem differentiating rapid eye movement sleep (REM) and non-rapid eye movement sleep (NREM). |
Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 | |
respevpr
Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Respiratory scoring problems
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Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Respiratory scoring problems
Due to signal problems, scorer noted that there was a problem scoring respiratory events. |
Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 | |
slewake
Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Sleep Wake Scoring
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Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Sleep Wake Scoring
Study was scored sleep/wake rather than with full sleep staging. This assessment is made by the scorer if there is not sufficient quality on EEG leads to do full R&K scoring. (0=no (full scoring); 1=yes (sleep/wake only)) Studies scored as sleep wake have all sleep stages scored using a default of Stage 2 and no arousals are scored. |
Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 | |
stg1stg2pr
Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Stage1/Stage2 Scoring unreliable
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Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Stage1/Stage2 Scoring unreliable
Scorer noted that there was a problem differentiating stage 1 and stage 2 sleep. |
Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 | |
stg2stg3pr
Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Stage2/Stage3-4 Scoring unreliable
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Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Stage2/Stage3-4 Scoring unreliable
Scorer noted that there was a problem differentiating stage 2 and stage 3/4 sleep. |
Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 | |
unustgou
Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Unusual Staging
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Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Unusual Staging
Scorer observed unusual sleep staging. This is noted when there is no sleep in any particular stage (eg. no rapid eye movement sleep (REM)). |
Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 | |
wakslepr
Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Wake/Sleep Scoring unreliable
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Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Wake/Sleep Scoring unreliable
Scorer noted that there was a problem differentiating stage wake from stage sleep. |
Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 |