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. Author manuscript; available in PMC: 2009 May 30.
Published in final edited form as: Auton Neurosci. 2008 Mar 4;139(1-2):78–85. doi: 10.1016/j.autneu.2008.01.006

Figure 2.

Figure 2

Adjusted means of low frequency RR interval variability (natural log) by age, race, and sex. LF power was significantly greater in younger participants compared to older ones, in whites compared to blacks, and in men compared to women.