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NSRR
SDNN - CHAT Variables
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Childhood Adenotonsillectomy Trial
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You are viewing variable information that is kept around for historical purposes only. The latest version
v0.14.0
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v0.11.0
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variables
Heart Rate Variability (HRV) Analysis
sdnn
sdnn
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sdann
sdnnidx
Name
sdnn
Label
Standard deviation of all normal sinus to normal sinus interbeat (NN) intervals
Units
seconds (s)
Type
numeric
Visit Number vs Standard deviation of all normal sinus to normal sinus interbeat (NN) intervals
N
Mean
StdDev
Median
Min
Max
Unknown
Total
Baseline
45,072
0.08
± 0.04
0.08
0.005
0.5
-
45,072
Follow-up
40,073
0.08
± 0.04
0.07
0.004
0.3
-
40,073