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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
quabdo
under
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.
abdodur
under
Sleep Monitoring/Polysomnography/Signal Quality
in
SHHS variables
Hours of useable signal are rounded out to the lowest whole integer (e.g. 4.6 hours of useable data = 4). Useable respiratory data is defined as the number of hours that abnormal breaths can be distinguished from normal breaths