Name

timest2p

Label

Percent Time in Stage 2

Description

Percent of sleep time in stage 2

Calculation
timest2p = tmstg2p
Units
percent
Type
numeric
Visit vs Percent Time in Stage 2
N Mean StdDev Median Min Max Unknown Total
Visit 5 707 56.1 ± 12.9 56.1 9.4 90.0 28 735
Age at time of visit vs Percent Time in Stage 2
Visit 5
N Mean StdDev Median Min Max Unknown Total
Total 634 56.1 ± 12.9 56.6 9.4 90.0 24 658
5-14 yrs old 63 38.4 ± 12.0 38.7 9.4 60.8 1 64
15-24 yrs old 110 52.8 ± 9.3 52.4 28.9 77.0 2 112
25-34 yrs old 61 56.0 ± 10.8 55.5 25.7 83.5 1 62
35-44 years 93 59.5 ± 10.6 59.4 34.8 82.8 5 98
45-54 years 141 58.4 ± 10.5 58.6 35.5 83.7 7 148
55-64 years 83 60.2 ± 13.6 60.2 21.2 87.2 1 84
65-74 years 52 61.4 ± 12.5 61.6 31.0 90.0 5 57
75-84 years 29 63.0 ± 11.2 64.8 37.6 84.1 2 31
85 years or older 2 81.2 ± 0.1 81.2 81.1 81.3 - 2
Sex vs Percent Time in Stage 2
Visit 5
N Mean StdDev Median Min Max Unknown Total
Total 707 56.1 ± 12.9 56.1 9.4 90.0 28 735
Female 394 54.6 ± 12.2 54.3 9.4 90.0 12 406
Male 313 57.9 ± 13.5 58.0 13.6 87.2 16 329
Race vs Percent Time in Stage 2
Visit 5
N Mean StdDev Median Min Max Unknown Total
Total 707 56.1 ± 12.9 56.1 9.4 90.0 28 735
White 294 55.1 ± 12.6 54.8 9.4 84.9 10 304
Black 391 57.0 ± 13.2 57.2 13.6 90.0 18 409
Other 22 53.3 ± 10.1 53.6 33.1 72.4 - 22