Table 3.

Univariate Associations between Heart Rate Variability Indices and Clinical and Paraclinical Variables

	SDNN, ms	SDNNindex, ms	SDANN, ms
Continuous variables
logCRP	r =–0.28‡	r =–0.24‡	r =–0.24‡
Age, years	r =–0.04	r =–0.02	r =–0.07
Body‐mass index, kg/m2	r =–0.07	r =–0.05	r =–0.05
Total cholesterol, mmol/L	r =–0.05	r =–0.06	r =–0.04
LDL cholesterol, mmol/L	r =–0.05	r =–0.01	r =–0.05
HDL cholesterol, mmol/L	r = 0.11	r = 0.07	r = 0.10
Triglycerides, mmol/L	r =–0.11	r =–0.14*	r =–0.09
Blood glucose, mmol/L	r =–0.02	r = 0.03	r =–0.03
LVEF, %	r = 0.09	r = 0.13*	r = 0.07
Categorical variables
± coronary artery stenosis	122 ± 32 vs 129 ± 35	48 ± 14 vs 51 ± 15	111 ± 33 vs 116 ± 35
± previous MI	120 ± 31 vs 126 ± 34	47 ± 13 vs 50 ± 14	109 ± 31 vs 113 ± 34
± smoking	113 ± 30 vs 131 ± 33‡	44 ± 12 vs 52 ± 14‡	102 ± 31 vs 118 ± 33‡
Male vs female	128 ± 34 vs 119 ± 31	50 ± 14 vs 47 ± 13	115 ± 34 vs 108 ± 31
± beta‐blocker	121 ± 33 vs 129 ± 34	50 ± 14 vs 47 ± 13	107 ± 33 vs 118 ± 33†
± ACE inhibitor	124 ± 36 vs 125 ± 33	48 ± 13 vs 49 ± 14	112 ± 36 vs 112 ± 33
± hypertension	121 ± 34 vs 127 ± 33	47 ± 11 vs 52 ± 15	109 ± 36 vs 115 ± 33
± diabetes	124 ± 37 vs 125 ± 33	50 ± 18 vs 49 ± 14	111 ± 36 vs 113 ± 33

*P < 0.05; †P < 0.01; ‡P < 0.001 (Spearman's rank correlation for continuous variables, Mann–Whitney test for discontinuous variables).

MI = myocardial infarction; LVEF = left ventricular ejection fraction.