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NSRR
RMSSD - 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
rmssd
rmssd
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pnn50
sdann
Name
rmssd
Label
Square root of the mean of the squares of difference between adjacent normal sinus to normal sinus interbeat (NN) intervals
Units
seconds (s)
Type
numeric
Visit Number vs Square root of the mean of the squares of difference between adjacent normal sinus to normal sinus interbeat (NN) intervals
N
Mean
StdDev
Median
Min
Max
Unknown
Total
Baseline
45,072
0.08
± 0.05
0.07
0.003
0.7
-
45,072
Follow-up
40,073
0.08
± 0.05
0.07
0.004
0.5
-
40,073