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NSRR
SDNNIDX - 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
sdnnidx
sdnnidx
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sdnn
sleepstage01
Name
sdnnidx
Label
Mean of the standard deviations of normal sinus to normal sinus interbeat (NN) intervals in all 5-minute segments
Units
seconds (s)
Type
numeric
Visit Number vs Mean of the standard deviations of normal sinus to normal sinus interbeat (NN) intervals in all 5-minute segments
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