Name

timeremp

Label

Percent Time in REM

Description

Percentage of sleep time spent in REM sleep. The ratio of time in REM sleep to total sleep time, expressed as a percentage.

Calculation
timeremp = tmremp
Units
percent
Type
numeric
Visit vs Percent Time in REM
N Mean StdDev Median Min Max Unknown Total
Visit 5 718 18.2 ± 7.3 18.4 0.0 43.9 17 735
Age at time of visit vs Percent Time in REM
Visit 5
N Mean StdDev Median Min Max Unknown Total
Total 643 18.0 ± 7.3 18.1 0.0 43.9 15 658
5-14 yrs old 63 14.3 ± 4.3 15.6 0.0 21.6 1 64
15-24 yrs old 111 17.1 ± 6.8 16.8 0.0 35.5 1 112
25-34 yrs old 62 19.5 ± 6.8 19.4 2.0 32.2 - 62
35-44 years 94 20.0 ± 7.0 19.9 2.0 43.9 4 98
45-54 years 142 19.4 ± 7.3 19.2 0.0 39.6 6 148
55-64 years 82 19.2 ± 7.6 19.8 0.0 40.9 2 84
65-74 years 57 17.0 ± 7.2 18.0 0.0 31.9 - 57
75-84 years 30 12.5 ± 8.7 13.4 0.0 30.3 1 31
85 years or older 2 4.9 ± 1.8 4.9 3.6 6.1 - 2
Sex vs Percent Time in REM
Visit 5
N Mean StdDev Median Min Max Unknown Total
Total 718 18.2 ± 7.3 18.4 0.0 43.9 17 735
Female 396 18.4 ± 7.5 18.6 0.0 43.9 10 406
Male 322 17.9 ± 7.0 18.0 0.0 40.9 7 329
Race vs Percent Time in REM
Visit 5
N Mean StdDev Median Min Max Unknown Total
Total 718 18.2 ± 7.3 18.4 0.0 43.9 17 735
White 297 17.7 ± 7.1 18.2 0.0 36.6 7 304
Black 399 18.5 ± 7.4 18.5 0.0 43.9 10 409
Other 22 18.7 ± 6.0 17.3 9.0 34.3 - 22