Histogram

Sleep Heart Health Study (SHHS) Visit Number vs Low frequency power: the normal sinus to normal sinus interbeat (NN) interval spectral power between 0.04 and 0.15 Hz
N Mean StdDev Median Min Max Unknown Total
Visit 1 42,920 1,184.4 ± 1,845.3 564.2 4.5 26,829.9 - 42,920
Interim Follow-up Visit - - - - - - - -
Visit 2 44,578 1,111.2 ± 2,199.9 489.9 1.1 55,420.5 - 44,578
CVD Outcomes - - - - - - - -