Histogram

Visit vs Percentage of total sleep duration in Stage 1 from type II polysomnography
N Mean StdDev Median Min Max Unknown Total
Visit 1 2,911 6.8 ± 4.4 6.0 0.0 58.0 - 2,911
Visit 2 1,026 12.2 ± 9.0 10.0 0.0 70.0 1,885 2,911
Age at Sleep Visit 1 vs Percentage of total sleep duration in Stage 1 from type II polysomnography
Visit 1
N Mean StdDev Median Min Max Unknown Total
Total 2,911 6.8 ± 4.4 6.0 0.0 58.0 - 2,911
67.0 to 72.0 years 728 6.1 ± 3.5 6.0 0.0 32.0 - 728
72.0 to 76.0 years 728 6.6 ± 4.1 6.0 0.0 28.0 - 728
76.0 to 80.0 years 728 6.9 ± 4.4 6.0 0.0 45.0 - 728
80.0 to 90.0 years 727 7.5 ± 5.2 6.0 0.0 58.0 - 727
Gender vs Percentage of total sleep duration in Stage 1 from type II polysomnography
Visit 1
N Mean StdDev Median Min Max Unknown Total
Total 2,911 6.8 ± 4.4 6.0 0.0 58.0 - 2,911
Female - - - - - - - -
Male 2,911 6.8 ± 4.4 6.0 0.0 58.0 - 2,911
Gender vs Percentage of total sleep duration in Stage 1 from type II polysomnography
Visit 2
N Mean StdDev Median Min Max Unknown Total
Total 1,026 12.2 ± 9.0 10.0 0.0 70.0 1,885 2,911
Female - - - - - - - -
Male 1,026 12.2 ± 9.0 10.0 0.0 70.0 1,885 2,911
Race Category vs Percentage of total sleep duration in Stage 1 from type II polysomnography
Visit 1
N Mean StdDev Median Min Max Unknown Total
Total 2,911 6.8 ± 4.4 6.0 0.0 58.0 - 2,911
White 2,651 6.8 ± 4.4 6.0 0.0 58.0 - 2,651
African American 99 6.5 ± 5.3 5.0 0.0 45.0 - 99
Asian 85 7.1 ± 3.7 7.0 1.0 17.0 - 85
Native Hawaiian or Other Pacific Islander 3 6.3 ± 2.1 7.0 4.0 8.0 - 3
American Indian or Alaskan Native 1 7.0 - 7.0 7.0 7.0 - 1
Multiracial 30 6.6 ± 3.4 6.5 1.0 19.0 - 30
Unknown 42 7.9 ± 4.8 7.0 1.0 22.0 - 42
Race Category vs Percentage of total sleep duration in Stage 1 from type II polysomnography
Visit 2
N Mean StdDev Median Min Max Unknown Total
Total 1,026 12.2 ± 9.0 10.0 0.0 70.0 1,885 2,911
White 896 12.6 ± 9.2 10.0 0.0 70.0 1,755 2,651
African American 41 10.2 ± 9.6 8.0 0.0 51.0 58 99
Asian 49 7.9 ± 5.0 6.0 0.0 23.0 36 85
Native Hawaiian or Other Pacific Islander 3 11.0 ± 10.8 8.0 2.0 23.0 - 3
American Indian or Alaskan Native 1 10.0 - 10.0 10.0 10.0 - 1
Multiracial 14 13.3 ± 7.4 12.5 3.0 27.0 16 30
Unknown 22 10.8 ± 6.3 9.0 3.0 24.0 20 42