lf_hf nn_rr
Name
lf_n
Label
Low frequency power (normalized)
Calculation
lf_n = lf_n = lf / (lf + hf)
Type
numeric
Tags
heart rate variability
Sleep Heart Health Study (SHHS) Visit Number vs Low frequency power (normalized)
N Mean StdDev Median Min Max Unknown Total
Visit 1 486 0.7 ± 0.1 0.7 0.2 0.9 - 486
Interim Follow-up Visit - - - - - - - -
Visit 2 493 0.6 ± 0.1 0.7 0.2 0.9 - 493
CVD Outcomes - - - - - - - -