sdann sdnnidx
Name
sdnn
Label
Standard deviation of all normal sinus to normal sinus interbeat (NN) intervals
Units
milliseconds
Type
numeric
Tags
heart rate variability ms
Sleep Heart Health Study (SHHS) Visit Number vs Standard deviation of all normal sinus to normal sinus interbeat (NN) intervals
N Mean StdDev Median Min Max Unknown Total
Visit 1 486 81.2 ± 26.3 78.4 24.5 221.7 - 486
Interim Follow-up Visit - - - - - - - -
Visit 2 493 78.4 ± 26.1 74.8 16.4 213.7 - 493
CVD Outcomes - - - - - - - -