timest1p waso
Name
timest2p
Label
Percent Time in Stage 2
Description

Percent of sleep time in stage 2 [100*(Number of minutes scored as stage 2) / (total sleep time)]

Calculation
timest2p = tmstg2p
Units
percent
Type
numeric
Tags
timest2p
SHHS Visit Number vs Percent Time in Stage 2
N Mean StdDev Median Min Max Unknown Total
Visit 1 5,642 56.5 ± 11.7 57.0 11.0 100.0 162 5,804
Visit 2 2,620 57.7 ± 11.1 58.0 20.0 98.0 1,460 4,080
CVD Outcomes - - - - - - 5,042 5,042
Age at SHHS1 vs Percent Time in Stage 2
Visit 1
N Mean StdDev Median Min Max Unknown Total
Total 5,642 56.5 ± 11.7 57.0 11.0 100.0 162 5,804
39.0 to 55.0 years 1,424 55.9 ± 10.6 56.0 19.0 100.0 27 1,451
55.0 to 63.0 years 1,422 55.7 ± 11.5 56.0 16.0 90.0 29 1,451
63.0 to 72.0 years 1,417 56.8 ± 12.0 58.0 16.0 86.0 34 1,451
72.0 to 100.0 years 1,379 57.7 ± 12.6 58.0 11.0 91.0 72 1,451
Gender vs Percent Time in Stage 2
Visit 1
N Mean StdDev Median Min Max Unknown Total
Total 5,642 56.5 ± 11.7 57.0 11.0 100.0 162 5,804
Female 2,951 53.0 ± 11.6 53.0 11.0 91.0 88 3,039
Male 2,691 60.4 ± 10.6 61.0 20.0 100.0 74 2,765
Gender vs Percent Time in Stage 2
Visit 2
N Mean StdDev Median Min Max Unknown Total
Total 2,620 57.7 ± 11.1 58.0 20.0 98.0 1,460 4,080
Female 1,416 54.3 ± 10.9 54.0 20.0 98.0 803 2,219
Male 1,204 61.8 ± 9.8 62.0 30.0 94.0 657 1,861
Race vs Percent Time in Stage 2
Visit 1
N Mean StdDev Median Min Max Unknown Total
Total 5,642 56.5 ± 11.7 57.0 11.0 100.0 162 5,804
white 4,785 56.3 ± 11.7 56.0 11.0 91.0 122 4,907
black 477 60.1 ± 11.6 61.0 23.0 100.0 38 515
native amer/alaskan 11 56.0 ± 12.0 55.0 42.0 82.0 - 11
asian/pacific islander 88 55.0 ± 10.5 55.0 28.0 82.0 - 88
hispanic/mex. amer 278 55.7 ± 11.1 56.0 28.0 86.0 2 280
other 3 61.7 ± 14.4 56.0 51.0 78.0 - 3
Race vs Percent Time in Stage 2
Visit 2
N Mean StdDev Median Min Max Unknown Total
Total 2,620 57.7 ± 11.1 58.0 20.0 98.0 1,460 4,080
white 2,286 57.5 ± 10.9 58.0 20.0 94.0 1,301 3,587
black 175 61.7 ± 11.7 62.0 26.0 98.0 81 256
native amer/alaskan 3 60.7 ± 19.1 58.0 43.0 81.0 5 8
asian/pacific islander 34 58.3 ± 12.1 61.5 28.0 78.0 14 48
hispanic/mex. amer 121 55.3 ± 10.7 55.0 28.0 84.0 59 180
other 1 72.0 - 72.0 72.0 72.0 - 1