Histogram

MESA exam number vs Total duration of Stage 1 sleep from type II polysomnography
N Mean StdDev Median Min Max Unknown Total
Exam 5 2,035 50.4 ± 30.7 43.0 1.0 245.0 202 2,237
Participant Age at MESA Sleep Visit vs Total duration of Stage 1 sleep from type II polysomnography
Exam 5
N Mean StdDev Median Min Max Unknown Total
Total 2,035 50.4 ± 30.7 43.0 1.0 245.0 202 2,237
54.0 to 62.0 years 518 44.2 ± 27.9 38.0 1.0 228.0 42 560
62.0 to 69.0 years 526 50.6 ± 31.8 42.0 6.0 223.0 33 559
69.0 to 77.0 years 507 52.7 ± 30.7 47.0 4.0 221.0 52 559
77.0 to 95.0 years 484 54.6 ± 31.6 48.0 5.0 245.0 75 559
Gender of the participant vs Total duration of Stage 1 sleep from type II polysomnography
Exam 5
N Mean StdDev Median Min Max Unknown Total
Total 2,035 50.4 ± 30.7 43.0 1.0 245.0 202 2,237
Female 1,094 44.5 ± 26.4 39.0 1.0 245.0 104 1,198
Male 941 57.3 ± 33.9 49.0 5.0 228.0 98 1,039
Race/ethnicity of the participant vs Total duration of Stage 1 sleep from type II polysomnography
Exam 5
N Mean StdDev Median Min Max Unknown Total
Total 2,035 50.4 ± 30.7 43.0 1.0 245.0 202 2,237
White, Caucasian 741 54.0 ± 33.1 47.0 4.0 245.0 89 830
Chinese American 247 46.5 ± 26.5 41.0 6.0 197.0 18 265
Black, African-American 564 45.7 ± 27.4 39.0 1.0 223.0 52 616
Hispanic 483 52.5 ± 31.9 44.0 8.0 199.0 43 526