Table 2.

Effects of Demographic and Behavioral Risk Factors on HRV Measures

Risk Factor	HRVs	Women (N=70)	Men (N=87)	p *
Sex	SDNN	132.34 (4.61)	160.26 (5.28)	<.0001
	ln_ULF	9.18 (0.08)	9.58 (0.07)	<.0001
	ln_VLF	7.45 (0.08)	7.95 (0.07)	<.0001
	ln_LF	6.81 (0.08)	7.28 (0.07)	<.0001
	ln_HF	6.2 (0.14)	6.49 (0.11)	0.21
Risk Factor	HRVs	Non Smoker (N=122)	Smoker (N=34)	p *
Smoker	SDNN	150.26 (4.23)	138.95 (7.89)	0.20
	ln_ULF	9.44 (0.06)	9.26 (0.11)	0.10
	ln_VLF	7.82 (0.06)	7.4 (0.12)	0.00
	ln_LF	7.16 (0.06)	6.75 (0.14)	0.01
	ln_HF	6.48 (0.09)	5.91 (0.21)	0.01
Risk Factor	HRVs	Education <=12 years (N=23)	Education >12 years (N=134)	P *
Education	SDNN	140.67 (8.28)	149.04 (4.14)	0.45
	ln_ULF	9.24 (0.12)	9.43 (0.06)	0.12
	ln_VLF	7.59 (0.12)	7.75 (0.06)	0.17
	ln_LF	6.96 (0.15)	7.09 (0.06)	0.38
	ln_HF	6.31 (0.18)	6.37 (0.09)	0.66
Risk Factor	HRVs	Caucasian (N=105)	African American (N=30)	p *
Race	SDNN	153.59 (4.78)	131.8 (6.4)	0.06
	ln_ULF	9.48 (0.07)	9.17 (0.11)	0.08
	ln_VLF	7.84 (0.07)	7.49 (0.11)	0.01
	ln_LF	7.18 (0.07)	6.82 (0.11)	0.01
	ln_HF	6.41 (0.11)	6.32 (0.18)	0.63
Risk Factor	HRVs	Estimate (Beta)	F value (DF=1)	p **
BMI	SDNN	−1.32	3.89	0.05
	ln_ULF	−0.01	1.42	0.24
	ln_VLF	−0.03	6.74	0.01
	ln_LF	−0.03	10.3	0.00
	ln_HF	−0.03	3.85	0.05
Risk Factor	HRVs	Estimate (Beta)	F value (DF=1)	p **
Days in Past Month Drinks	SDNN	0.40	0.51	0.47
	ln_ULF	0.01	2.39	0.12
	ln_VLF	0.02	4.47	0.04
	ln_LF	0.02	4.02	0.05
	ln_HF	−0.01	0.17	0.68

All values represent mean ± SE except BMI and Alcohol use Days in Past Month;

^*ANOVA analysis;

^**SDNN, standard deviation of NN intervals; ULF, ultra-low frequency power;

VLF, very-low frequency power; LF, low frequency power; HF, high frequency power; Regression analysis