Name
potmst1
Label
Total duration of Stage 1 sleep from type II polysomnography
Units
minutes
Type
numeric
Visit vs Total duration of Stage 1 sleep from type II polysomnography
N Mean StdDev Median Min Max Unknown Total
Visit 1 2,911 23.4 ± 13.7 21.0 0.0 115.0 - 2,911
Visit 2 1,026 40.2 ± 27.7 34.0 0.0 189.0 1,885 2,911
Age at Sleep Visit 1 vs Total duration of Stage 1 sleep from type II polysomnography
Visit 1
N Mean StdDev Median Min Max Unknown Total
Total 2,911 23.4 ± 13.7 21.0 0.0 115.0 - 2,911
67.0 to 72.0 years 728 21.6 ± 11.8 20.0 0.0 111.0 - 728
72.0 to 76.0 years 728 23.1 ± 13.4 21.0 0.0 96.0 - 728
76.0 to 80.0 years 728 23.7 ± 13.6 21.0 0.0 98.0 - 728
80.0 to 90.0 years 727 25.4 ± 15.7 22.0 0.0 115.0 - 727
Gender vs Total duration of Stage 1 sleep from type II polysomnography
Visit 1
N Mean StdDev Median Min Max Unknown Total
Total 2,911 23.4 ± 13.7 21.0 0.0 115.0 - 2,911
Female - - - - - - - -
Male 2,911 23.4 ± 13.7 21.0 0.0 115.0 - 2,911
Gender vs Total duration of Stage 1 sleep from type II polysomnography
Visit 2
N Mean StdDev Median Min Max Unknown Total
Total 1,026 40.2 ± 27.7 34.0 0.0 189.0 1,885 2,911
Female - - - - - - - -
Male 1,026 40.2 ± 27.7 34.0 0.0 189.0 1,885 2,911
Race Category vs Total duration of Stage 1 sleep from type II polysomnography
Visit 1
N Mean StdDev Median Min Max Unknown Total
Total 2,911 23.4 ± 13.7 21.0 0.0 115.0 - 2,911
White 2,651 23.4 ± 13.8 21.0 0.0 115.0 - 2,651
African American 99 21.4 ± 11.9 20.0 0.0 56.0 - 99
Asian 85 25.0 ± 11.7 24.0 5.0 60.0 - 85
Native Hawaiian or Other Pacific Islander 3 17.7 ± 6.0 17.0 12.0 24.0 - 3
American Indian or Alaskan Native 1 24.0 - 24.0 24.0 24.0 - 1
Multiracial 30 24.4 ± 10.3 25.0 3.0 48.0 - 30
Unknown 42 27.5 ± 16.7 25.5 5.0 78.0 - 42
Race Category vs Total duration of Stage 1 sleep from type II polysomnography
Visit 2
N Mean StdDev Median Min Max Unknown Total
Total 1,026 40.2 ± 27.7 34.0 0.0 189.0 1,885 2,911
White 896 41.1 ± 27.8 35.0 0.0 189.0 1,755 2,651
African American 41 34.2 ± 32.6 24.0 0.0 134.0 58 99
Asian 49 28.1 ± 18.0 24.0 0.0 96.0 36 85
Native Hawaiian or Other Pacific Islander 3 27.7 ± 27.9 22.0 3.0 58.0 - 3
American Indian or Alaskan Native 1 40.0 - 40.0 40.0 40.0 - 1
Multiracial 14 48.3 ± 30.0 40.5 11.0 108.0 16 30
Unknown 22 40.9 ± 25.6 32.5 10.0 92.0 20 42