Name
slpeff
Label
Sleep Efficiency (%): the proportion of sleep duration in in-bed period
Description

Sleep duration is the interval between sleep onset time and lights on/out-bed time while asleep, while in-bed period is the interval between lights off/in-bed time and lights on/out-bed time. Conventionally, this variable could be described as the ratio between total sleep time (TST) and time in bed (TIB).

Type
numeric
Labels
A4b. Visit of Sleep Study vs Sleep Efficiency (%): the proportion of sleep duration in in-bed period
N Mean StdDev Median Min Max Unknown Total
Visit 1 3,012 92.4 ± 8.7 95.0 26.9 100.2 - 3,012
Visit 3 2,332 92.0 ± 9.4 95.1 4.4 100.4 - 2,332
Race/ethnicity combined categories derived from V1AF05 and V1AF07a-g vs Sleep Efficiency (%): the proportion of sleep duration in in-bed period
Visit 1
N Mean StdDev Median Min Max Unknown Total
Total 3,012 92.4 ± 8.7 95.0 26.9 100.2 - 3,012
Non-Hispanic White 1,842 93.0 ± 8.0 95.4 29.2 100.2 - 1,842
Non-Hispanic Black 359 89.1 ± 11.9 92.9 26.9 100.0 - 359
Hispanic 557 92.3 ± 8.1 94.8 39.0 100.0 - 557
Asian 112 93.8 ± 8.6 96.9 49.1 100.0 - 112
Other 142 90.9 ± 9.8 93.8 37.7 100.0 - 142
Race/ethnicity combined categories derived from V1AF05 and V1AF07a-g vs Sleep Efficiency (%): the proportion of sleep duration in in-bed period
Visit 3
N Mean StdDev Median Min Max Unknown Total
Total 2,332 92.0 ± 9.4 95.1 4.4 100.4 - 2,332
Non-Hispanic White 1,494 93.2 ± 8.1 95.6 4.4 100.4 - 1,494
Non-Hispanic Black 247 87.8 ± 12.6 91.6 22.3 100.0 - 247
Hispanic 397 90.0 ± 11.0 93.7 25.5 100.0 - 397
Asian 84 91.6 ± 9.6 95.0 50.7 99.6 - 84
Other 110 92.0 ± 7.5 94.1 54.9 100.0 - 110