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NSRR
HF_N - SHHS Variables
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Sleep Heart Health Study
Docs
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Variables
v0.20.0
shhs
variables
Clinical Data
Diagnostic Studies
Heart Rate Variability
hf_n
hf_n
Overview
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Histogram
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Related
History
hf
ihr
Name
hf_n
Label
High frequency power (normalized)
Calculation
hf_n
=
hf_n
=
hf
/ (
lf
+
hf
)
Type
numeric
Tags
heart rate variability
Sleep Heart Health Study (SHHS) Visit Number vs High frequency power (normalized)
N
Mean
StdDev
Median
Min
Max
Unknown
Total
Visit 1
42,920
0.4
± 0.2
0.3
0.02
1.0
-
42,920
Interim Follow-up Visit
-
-
-
-
-
-
-
-
Visit 2
44,578
0.4
± 0.2
0.3
0.01
1.0
-
44,578
CVD Outcomes
-
-
-
-
-
-
-
-