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abdoqual
under
Sleep Monitoring/Polysomnography/Signal Quality/SHHS1
in
SHHS variables
Sleep Hearth Health Study Visit 1 (SHHS1)-Vary from 1 (poorest) to 4 (best) and reflect the proportion of time the signals were useable. Useable respiratory data is defined as the number of hours that abnormal breaths can be distinguished from normal breaths