Histogram

Visit Number vs Total normal sinus to normal sinus interbeat (NN) interval spectral power up to 0.4 Hz
N Mean StdDev Median Min Max Unknown Total
Baseline 45,072 0.008 ± 0.009 0.005 1.0,-05 0.2 - 45,072
Follow-up 40,073 0.008 ± 0.008 0.005 1.0,-05 0.2 - 40,073