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EKG signal quality code
embqs_ekg_qcode
under Sleep Monitoring/Polysomnography/Signal Quality in
BESTAIR variables
EKG hours of useable signal
embqs_ekg_signal
under Sleep Monitoring/Polysomnography/Signal Quality in
BESTAIR variables
B7a. EKG (hours usable) from type III home sleep apnea test
ekghrs_f1t3
under Sleep Monitoring/Polysomnography/Signal Quality in
NUMOM2B variables
B7b. EKG (quality code) from type III home sleep apnea test
ekgqual_f1t3
under Sleep Monitoring/Polysomnography/Signal Quality in
NUMOM2B variables
Has a doctor ever told you that you have an abnormal EKG, ECG, or electrocardiogram?
v4ekg
under Medical History in
SOF variables
This variable was collected at visit 4, a different timepoint than the 'Visit 8' sleep variables
ECG channel: Hours of usable signal
ecghrs
under Sleep Monitoring/Polysomnography/Signal Quality in
HEARTBEAT variables
ECG channel: Proportion of valid signal time
ecgqual
under Sleep Monitoring/Polysomnography/Signal Quality in
HEARTBEAT variables
Hours of usable ECG based on total recording time (TRT)
htdur
under Sleep Monitoring/Polysomnography/Signal Quality in
SOF variables
Has electrocardiogram (ECG) data (Sleep Heart Health Study Visit One (SHHS1))
ecg
under Administrative/SHHS1 in
SHHS variables
Quality of the heart rate signal
quhr
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.
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