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NSRR
TIMEST2P - CCSHS Variables
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Cleveland Children's Sleep and Health Study
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v0.6.0
ccshs
variables
Measurements
Polysomnography (PSG)
timest2p
timest2p
Overview
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Age
Gender
Race
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timest2
timest34
Name
timest2p
Label
Percent of sleep time in Stage 2 sleep
Description
[100*(number of minutes scored as stage 2 sleep)/(total sleep time)]
Units
percent (%)
Type
numeric
Tags
non rapid
non-rapid eye movement sleep
non rem
non-rem
nrem
Visit vs Percent of sleep time in Stage 2 sleep
N
Mean
StdDev
Median
Min
Max
Unknown
Total
Peds
-
-
-
-
-
-
-
-
Teenz
-
-
-
-
-
-
-
-
TREC
513
52.0
± 7.4
52.4
29.1
72.8
4
517
Age at time of visit vs Percent of sleep time in Stage 2 sleep
TREC
N
Mean
StdDev
Median
Min
Max
Unknown
Total
Total
513
52.0
± 7.4
52.4
29.1
72.8
4
517
16.14 to 17.41 years
129
50.6
± 7.5
50.6
29.3
69.4
1
130
17.41 to 17.69 years
128
51.7
± 7.7
52.7
29.4
66.6
1
129
17.69 to 17.91 years
128
53.1
± 6.5
53.6
37.7
70.2
1
129
17.91 to 19.56 years
128
52.5
± 7.8
53.5
29.1
72.8
1
129
Male gender vs Percent of sleep time in Stage 2 sleep
TREC
N
Mean
StdDev
Median
Min
Max
Unknown
Total
Total
513
52.0
± 7.4
52.4
29.1
72.8
4
517
No
254
51.7
± 7.5
52.4
29.1
72.8
2
256
Yes
259
52.2
± 7.4
52.4
29.3
70.2
2
261
Race vs Percent of sleep time in Stage 2 sleep
TREC
N
Mean
StdDev
Median
Min
Max
Unknown
Total
Total
513
52.0
± 7.4
52.4
29.1
72.8
4
517
White
307
51.8
± 7.6
51.9
29.1
69.4
2
309
Black
183
52.1
± 7.4
53.1
29.4
72.8
2
185
Other
23
52.4
± 5.2
50.9
43.0
63.1
-
23