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NSRR
HF - CHAT Variables
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Childhood Adenotonsillectomy Trial
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Variables
v0.14.0
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variables
Clinical Data
Diagnostic Studies
Heart Rate Variability
hf
hf
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hasrespevent
ihr
Name
hf
Label
High frequency power: the normal sinus to normal sinus interbeat (NN) interval spectral power between 0.15 and 0.4 Hz
Units
seconds squared (s2)
Type
numeric
Visit Number vs High frequency power: the normal sinus to normal sinus interbeat (NN) interval spectral power between 0.15 and 0.4 Hz
N
Mean
StdDev
Median
Min
Max
Unknown
Total
Baseline
45,072
0.004
± 0.006
0.002
2.0,-06
0.2
-
45,072
Follow-up
40,073
0.004
± 0.005
0.002
3.0,-06
0.07
-
40,073