Table 2.

Hierarchal regression analysis of age, sex, race, body mass index, ambulatory blood pressure and the heart rate variablility × race interaction as predictors of left ventricular mass index

Predictors	Model 1 b (SE) [β]	Model 2 b (SE) [β]	Model 3b (SE) [β]
Age	0.07 (0.12) [0.05]	0.08 (0.13) [0.05]	0.06 (0.13) [0.04]
Sex	4.21 (1.41) [0.24]**	3.07 (1.48) [0.18]**	2.45 (1.49) [0.14]*
Race	2.48 (1.39) [0.15]	1.00 (1.37) [0.06]	−16.34 (7.68) [−0.96]
BMI		0.38 (0.22) [0.15]	0.41 (0.22) [0.16]
SBP24h		0.12 (0.11) [0.18]	0.13 (0.11) [0.18]
DBP24h		0.06 (0.16) [0.06]	0.08 (0.16) [0.08]
lnHF-HRV		1.44 (0.65) [0.19]*	0.09 (0.87) [0.01]
lnHF-HRV × race			2.67 (1.16) [1.06]*
R2	0.05**	0.14**	0.16**
3R2	0.05**	0.09**	0.02**

Abbreviations: BMI, body mass index; SBP₂₄, mean 24 hour systolic blood pressure; DBP₂₄, mean 24 hour diastolic blood pressure; HF-HRV, high-frequency heart rate variability.

^*P < 0.05,

^**P < 0.01.