Histogram

MESA exam number vs Percentage of total sleep duration in Stage 2 from type II polysomnography
N Mean StdDev Median Min Max Unknown Total
Exam 5 2,035 57.6 ± 10.3 58.1 18.7 90.9 202 2,237
Participant Age at MESA Sleep Visit vs Percentage of total sleep duration in Stage 2 from type II polysomnography
Exam 5
N Mean StdDev Median Min Max Unknown Total
Total 2,035 57.6 ± 10.3 58.1 18.7 90.9 202 2,237
54.0 to 62.0 years 518 57.3 ± 9.3 57.6 19.5 84.0 42 560
62.0 to 69.0 years 526 57.1 ± 10.3 57.5 23.2 90.9 33 559
69.0 to 77.0 years 507 57.6 ± 10.5 58.3 20.7 86.1 52 559
77.0 to 95.0 years 484 58.2 ± 10.9 59.0 18.7 86.5 75 559
Gender of the participant vs Percentage of total sleep duration in Stage 2 from type II polysomnography
Exam 5
N Mean StdDev Median Min Max Unknown Total
Total 2,035 57.6 ± 10.3 58.1 18.7 90.9 202 2,237
Female 1,094 56.6 ± 10.1 57.0 18.7 86.1 104 1,198
Male 941 58.7 ± 10.4 59.3 19.5 90.9 98 1,039
Race/ethnicity of the participant vs Percentage of total sleep duration in Stage 2 from type II polysomnography
Exam 5
N Mean StdDev Median Min Max Unknown Total
Total 2,035 57.6 ± 10.3 58.1 18.7 90.9 202 2,237
White, Caucasian 741 56.0 ± 10.5 56.1 18.7 90.9 89 830
Chinese American 247 57.6 ± 9.5 58.6 30.9 83.6 18 265
Black, African-American 564 60.1 ± 9.9 60.9 25.8 86.5 52 616
Hispanic 483 57.1 ± 10.3 57.6 19.5 86.1 43 526