quoxim slpprdp
Name
slp_eff
Label
Sleep Efficiency: the ratio of sleep duration (i.e. total sleep time) to in-bed period from type II polysomnography
Description

Sleep duration is the interval between sleep onset time and lights on/out-bed time while asleep (i.e. total sleep time, TST), while in-bed period is the interval between lights off/in-bed time and lights on/out-bed time (i.e. time in bed, TIB).

Percentage of time in bed that was spent sleeping, or the ratio of total sleep time to total time in bed, expressed as a percentage.

Calculation
slp_eff = 100 * ( slpprdp ) / timebedp
Units
percent (%)
Type
numeric
Tags
slpeffp ttleffsp_f1t2
Visit number vs Sleep Efficiency: the ratio of sleep duration (i.e. total sleep time) to in-bed period from type II polysomnography
N Mean StdDev Median Min Max Unknown Total
Visit 8 461 74.3 ± 13.2 77.2 27.9 98.7 - 461
Age (categorical) vs Sleep Efficiency: the ratio of sleep duration (i.e. total sleep time) to in-bed period from type II polysomnography
Visit 8
N Mean StdDev Median Min Max Unknown Total
Total 455 74.4 ± 13.1 77.2 27.9 98.7 - 455
75-84 years 325 75.6 ± 12.6 77.9 27.9 98.7 - 325
85 years or older 130 71.3 ± 13.9 73.7 28.9 93.5 - 130
Gender vs Sleep Efficiency: the ratio of sleep duration (i.e. total sleep time) to in-bed period from type II polysomnography
Visit 8
N Mean StdDev Median Min Max Unknown Total
Total 461 74.3 ± 13.2 77.2 27.9 98.7 - 461
Female 461 74.3 ± 13.2 77.2 27.9 98.7 - 461