Table 2.

Correlation Coefficients between Heart Rate Variability, Inflammatory Markers and Covariates

Variables	Ln ULF	Ln VLF	Ln LF	Ln HF	Ln IL-6	Ln CRP
Age	0.02	0.09	−0.05	−0.10	0.07	0.09
Smoking	−0.23†	−0.24‡	−0.20†	−0.09	0.18†	0.21†
Hypertension	−0.14	−0.15	−0.18†	0.19†	0.03	0.12*
Diabetes	−0.12	−0.12	−0.13	−0.04	0.12	0.12
Physical activity	0.12	0.23†	0.18†	0.06	−0.25†	−0.28†
BMI	−0.05	−0.06	−0.14*	−0.05	0.10	0.29†
HR	−0.59†	−0.66†	−0.41*	0.35†	0.17†	0.29†
SBP	−0.03	0.04	0.01	−0.04	−0.01	0.07
DBP	−0.09†	0.02	0.06	−0.03	−0.14‡	0.02
TC	0.04	0.08	0.06	0.08	−0.06	0.002
HDL-C	0.10	0.19†	0.11	0.09*	−0.23†	−0.24†
LDL-C	0.11	0.15	0.16	0.13	−0.01	0.03
Glucose	−0.01	−0.08	−0.13	−0.07	0.04	0.07
Norepinephrine	−0.16*	−0.23†	−0.16*	−0.02	0.20†	0.21†
BDI scores	−0.22†	−0.24†	−0.15*	−0.08	0.21*	0.14
Ln IL-6	−0.21*	−0.23†	−0.19	−0.02	-
Ln CRP	−0.29†	−0.26†	−0.22†	−0.04	0.55†	-

^*P < 0.05

^†P < 0.01

P value is adjusted for correlations within twin pairs. Abbreviations as defined in Table 1