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NSRR
LF_N - SHHS Variables
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Sleep Heart Health Study
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Variables
v0.20.0
shhs
variables
Clinical Data
Diagnostic Studies
Heart Rate Variability
lf_n
lf_n
Overview
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History
lf_hf
nn_rr
Name
lf_n
Label
Low frequency power (normalized)
Calculation
lf_n
=
lf_n
=
lf
/ (
lf
+
hf
)
Type
numeric
Tags
heart rate variability
Sleep Heart Health Study (SHHS) Visit Number vs Low frequency power (normalized)
N
Mean
StdDev
Median
Min
Max
Unknown
Total
Visit 1
42,920
0.6
± 0.2
0.7
0.04
1.0
-
42,920
Interim Follow-up Visit
-
-
-
-
-
-
-
-
Visit 2
44,578
0.6
± 0.2
0.7
0.03
1.0
-
44,578
CVD Outcomes
-
-
-
-
-
-
-
-