. 2015 Oct 1;2015:329057. doi: 10.1155/2015/329057

Table 3.

Spearman correlation coefficients (Rho) between heart rate variability measures (supine position) and age, anthropometric, body composition, and clinical variables.

Variables	log⁡HR	log⁡RMSSD	log⁡HF	log⁡LF	log⁡LF/HF
Age	−0.04	−0.27^∗	−0.24^∗	−0.17^∗	0.13^∗
Anthropometric
Body mass index (kg/m²)	0.18^∗	−0.14^∗	−0.14^∗	−0.12^∗	0.05
Waist circumference (cm)	0.22^∗	−0.17^∗	−0.16^∗	−0.15^∗	0.05
Neck circumference (cm)	0.19^∗	−0.15^∗	−0.14^∗	−0.13^∗	0.04
Waist-to-hip ratio	0.20^∗	−0.18^∗	−0.15^∗	−0.15^∗	0.05
Waist-to-height ratio	0.21^∗	−0.15^∗	−0.15^∗	−0.14^∗	0.05
Body composition
Total body fat (%)	0.15^∗	−0.06	−0.07	−0.03	0.03
Total body fat (kg)	0.17^∗	−0.09^∗	−0.11^∗	−0.08	0.03
Visceral fat area (cm²)	0.24^∗	−0.13^∗	−0.11^∗	−0.09	0.04
Clinical
Systolic blood pressure (mmHg)	0.21^∗	−0.13^∗	−0.14^∗	−0.002	0.16^∗
Diastolic blood pressure (mmHg)	0.18^∗	−0.16^∗	−0.16^∗	−0.06	0.11^∗

log⁡HF, natural logarithm of power in the high frequency range; log⁡HR, natural logarithm of the heart rate; log⁡LF, natural logarithm of power in the low frequency range; log⁡LF/HF, natural logarithm of the ratio LF (ms²)/HF (ms²); log⁡RMSSD, natural logarithm of the root mean square of successive RR interval differences; ∗ represents p < 0.05.