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lightoff
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Sleep Monitoring/Polysomnography/Signal Quality/SHHS1
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SHHS variables
Sleep Heart Health Study Visit 1 (SHHS1)- 0= Appropriate/1= Not Appropriate. Note that the indication of lights being appropriate or not appropriate relates only to whether the light signal was working and does NOT infer anything about sleep latency or sleep onset variables.
quabdo
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Sleep Monitoring/Polysomnography/Signal Quality/SHHS2
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SHHS variables
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.
stg1stg2pr
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Sleep Monitoring/Polysomnography/Signal Quality
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CHAT variables
1=Sleep staging problem - scoring stage1/stage2 unreliable (when K-complexes and sleep spindles do not have show their classical morphology and distinction between Stage 1 and Stage 2 is doubtful (characteristic for the studies with low voltage EEG))
quchest
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Sleep Monitoring/Polysomnography/Signal Quality/SHHS2
in
SHHS variables
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.