psg - Search - Sleep Data - National Sleep Research Resource

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.

PSG Quality Assessment: Arousals Ignored

aroign under Sleep Monitoring/Polysomnography/Signal Quality in CFS variables

Due to problems with EEG signals, arousals were ignored in scoring.

PSG Quality Assessment: Problems with arousals

aropr under Sleep Monitoring/Polysomnography/Signal Quality in CFS variables

Scorer noted that there was a problem scoring arousals.

PSG Quality Assessment: Arousals unreliable

arunrel under Sleep Monitoring/Polysomnography/Signal Quality in CFS variables

Due to signal problems, scorer was unable to reliably assess arousals. The scoring of arousals was determined to be unreliable.

PSG Quality Assessment: hours of usable cannula

candur under Sleep Monitoring/Polysomnography/Signal Quality in CFS variables

Number of hours of usable signal

PSG Quality Assessment: hours of usable chest effort

chestdur under Sleep Monitoring/Polysomnography/Signal Quality in CFS variables

Number of hours of usable signal from thoracic effort belt as assessed by scorer.

PSG Quality Assessment: hours of usable chin

chindur under Sleep Monitoring/Polysomnography/Signal Quality in CFS variables

Number of hours of usable signal from chin (EMG) lead as assessed by scorer.

PSG Quality Assessment: Signal Quality comments

comm under Sleep Monitoring/Polysomnography/Signal Quality in CFS variables

Scorer comments on signal quality issues observed.

Polysomnography (PSG) Quality Assessment: Periodic breathing (10 minutes)

csbre under Sleep Monitoring/Polysomnography/Signal Quality in CFS variables

Scorer observed periodic breathing for a period of at least 10 minutes during study.

PSG Quality Assessment: hours of usable EEG1

eeg1dur under Sleep Monitoring/Polysomnography/Signal Quality in CFS variables

Number of hours of usable signal from EEG1 lead as assessed by scorer.

PSG Quality Assessment: hours of usable EEG2

eeg2dur under Sleep Monitoring/Polysomnography/Signal Quality in CFS variables

Number of hours of usable signal from EEG2 lead as assessed by scorer.

PSG Quality Assessment: hours of usable EOG L

eogldur under Sleep Monitoring/Polysomnography/Signal Quality in CFS variables

Number of hours of usable signal from left eye (EOG) lead as assessed by scorer.

PSG Quality Assessment: hours of usable EOG R

eogrdur under Sleep Monitoring/Polysomnography/Signal Quality in CFS variables

Number of hours of usable signal from right eye (EOG) lead as assessed by scorer.

PSG Quality Assessment: hours of usable HR

hrdur under Sleep Monitoring/Polysomnography/Signal Quality in CFS variables

Number of hours of usable signal from heart rate (ECG) leads as assessed by scorer.

PSG Quality Assessment: Medical Alert - HR > 150

hrov150 under Sleep Monitoring/Polysomnography/Signal Quality in CFS variables

Medical Alert for heart rate over 150.

PSG Quality Assessment: Medical Alert - HR < 30

hrund30 under Sleep Monitoring/Polysomnography/Signal Quality in CFS variables

Medical Alert for heart rate under 30.

Polysomnography (PSG) Quality Assessment: Periodic breathing (10 minutes)

lagbreath under Sleep Monitoring/Polysomnography/Signal Quality in CFS variables

Scorer observed periodic breathing for a period of at least 10 minutes during study.

PSG Scoring Notes: Sleep latency reliability

latreliable under Sleep Monitoring/Polysomnography/Signal Quality in CFS variables

Scorer assessed that sleep latency was reliable.

PSG Quality Assessment: Data Lost at beginning of study

losbeg under Sleep Monitoring/Polysomnography/Signal Quality in CFS variables

Data was lost at the beginning of study due to unscorable signals.