Name

rmssd

Label

Square root of the mean of the squares of difference between adjacent normal sinus to normal sinus interbeat (NN) intervals

Units
milliseconds
Type
numeric
Sleep Heart Health Study (SHHS) Visit Number vs Square root of the mean of the squares of difference between adjacent normal sinus to normal sinus interbeat (NN) intervals
N Mean StdDev Median Min Max Unknown Total
Visit 1 42,920 35.3 ± 28.7 27.5 4.4 306.3 - 42,920
Interim Follow-up Visit - - - - - - - -
Visit 2 44,578 34.1 ± 29.6 26.0 3.1 475.1 - 44,578
CVD Outcomes - - - - - - - -