Related Variables
| sh322 |
Sleep Habits (Sleep Heart Health Study Visit Two (SHHS2)): Did not smoke for a year while smoker
22. Since you began smoking, was there ever a period of one year or more that you did NOT smoke? |
Lifestyle and Behavioral Health/SHHS2 | |
| restan4 |
Polysomnography (PSG) Scoring Notes (Sleep Heart Health Study Visit One (SHHS1)): Intervening period bad EEG
"1: Yes", this indicates more than 30 minutes of the sleep period had either lost or unscorable EEG data |
Sleep Monitoring/Polysomnography/Signal Quality/SHHS1 | |
| restan5 | Polysomnography (PSG) Scoring Notes (Sleep Heart Health Study Visit One (SHHS1)): Intervening period bad Resp./Oximetry | Sleep Monitoring/Polysomnography/Signal Quality/SHHS1 | |
| csbre |
Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Periodic breathing (10 minutes)
Scorer observed periodic breathing for a period of at least 10 minutes during study. |
Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 | |
| recafsle |
Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Data Lost - Recording began after sleep
Data was lost at the beginning of sleep period because recording began after sleep onset. |
Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 | |
| recbeaw |
Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Data Lost - Recording ended before wake
Data was lost at the end of sleep period because recording ended before wake. |
Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 | |
| slpeffp |
Sleep Maintenance Efficiency: the proportion of sleep duration in sleep period from type II polysomnography
Sleep duration (i.e. total sleep time, TST) is the interval between sleep onset and sleep offset time while asleep. Sleep period is just the interval between sleep onset and sleep offset time. |
Sleep Monitoring/Polysomnography/Sleep Architecture | |
| timebedp |
Total In-bed Period: the interval between lights out/in-bed time and lights off/out-bed time from type II polysomnography
Calculated. Conventionally this variable would be called time in bed (TIB). |
Sleep Monitoring/Polysomnography/Sleep Architecture | |
| hrswd02 |
Sleep Habits (Sleep Heart Health Study Visit One (SHHS1)): sleep time on weekdays
How many hours of sleep do you usually get at night (or your main sleep period) on weekdays or workdays? (number of hours, up to 2 digits) |
Sleep Questionnaires/Sleep Habits | |
| hrswe02 |
Sleep Habits (Sleep Heart Health Study Visit One (SHHS1)): sleep time on weekends
How many hours of sleep do you usually get at night (or your main sleep period) on weekends or your non-workdays? (number of hours, up to 2 digits) |
Sleep Questionnaires/Sleep Habits |