Histogram

Sleep Heart Health Study (SHHS) Visit Number vs High frequency power: the normal sinus to normal sinus interbeat (NN) interval spectral power between 0.15 and 0.4 Hz
N Mean StdDev Median Min Max Unknown Total
Visit 1 42,920 673.0 ± 1,509.2 270.9 2.2 33,299.5 - 42,920
Interim Follow-up Visit - - - - - - - -
Visit 2 44,578 635.8 ± 1,633.8 241.8 1.0 70,262.6 - 44,578
CVD Outcomes - - - - - - - -