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lgbreath
under
Sleep Monitoring/Polysomnography/Signal Quality/SHHS1
in
SHHS variables
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.
staging5
under
Sleep Monitoring/Polysomnography/Signal Quality/SHHS1
in
SHHS variables
When the technical quality of the EEG does not allow distinction between sleep stages, but allows a differentiation between sleep and wake. The time considered sleep will be marked as Stage 2. No arousals will be scored for these studies.
abnoreye
under
Sleep Monitoring/Polysomnography/Signal Quality
in
SHHS variables
Scorer observed abnormal eye movements during study. Presence of the rhythmical lateral eye movements in Non-REM sleep, or asymmetrical or disconjugate movements.
Date and start time of the PSG as listed n the EDF file's header. Note: the start date has been deidentified to the first day of that month the PSG conducted.