Table V.

Comparison of Baseline Autonomic Data (Above vs. Below the Median) to Changes (Δ) in Cardiac Structure and Function Over 1 Year (t Test)

Autonomic Test	Δ LVM	Δ LV Septum	Δ Fractional Shortening	Δ Ejection Fraction	Δ Diastolic Compliance
SDNN	0.09	1.00	0.94	0.24	0.94
SDANN	0.09	1.00	0.94	0.24	0.94
pNN50	0.99	0.93	0.72	0.55	0.12
RMSSD	0.95	0.83	0.49	1.00	0.05
CVNN	0.005	1.00	0.41	0.009	0.84
LF	0.37	0.27	0.62	1.00	0.72
HF	0.40	0.13	0.88	0.56	0.87
LVM=left ventricular (LV) mass; SDNN=SD of the RR intervals over a 24‐hour period; SDANN=SD of all 5‐min mean RR intervals; ASDNN=average SD of all 5‐min RR intervals; pNN50=% of RR intervals with >50 ms variation; RMSSD=$$ of mean squared differences of successive RR intervals; CVNN=covariance of the RR intervals; LF=low frequency; HF=high frequency