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SDANN - 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
sdann
sdann
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rmssd
sdnn
Name
sdann
Label
Standard deviation of the averages of normal sinus to normal sinus interbeat (NN) intervals in all 5-minute segments
Units
seconds (s)
Type
numeric
Visit Number vs Standard deviation of the averages of normal sinus to normal sinus interbeat (NN) intervals in all 5-minute segments
N
Mean
StdDev
Median
Min
Max
Unknown
Total
Baseline
451
0.06
± 0.03
0.05
0.02
0.2
-
451
Follow-up
406
0.05
± 0.02
0.05
0.02
0.2
-
406