Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Factor loadings for the heart rate variability outcome measures
HRV, heart rate variability; mean RR, mean RR interval; RMSSD, root mean square of successive difference; SDNN, standard deviation of NN intervals.
Values greater than 0.7.
Fraction of total variance explained by the respective factor.
