Table 3.

Adjusted regression coefficient of HRV in association with 1SD increase in cMetS and its components stratified by gender.

	HRV Index

	Gender	Log-HF (ms²) β (SE)	Log LF (ms²) β (SE)	LF/HF ratio β (SE)	SDNN (ms) β (SE)	RMSSD (ms) β (SE)	HR (bpm) β (SE)
cMetS	M	−0.13(0.03)^**	−0.08(0.01)^**	0.15(0.03)^**	−3.38(0.66)^**	−2.74(0.97)^**	1.85(0.35)^**
	F	−0.05(0.03)	−0.05(0.02)^**	0.01(0.03)	−0.35(0.74)	−0.32(1.08)	1.02(0.38)^**
WC	M	−0.13(0.03)^**	−0.08(0.01)^**	0.12(0.03)^**	−3.28(0.68)^**	−2.60(0.99)^**	1.76(0.36)^**
	F	0.02(0.04)	−0.03(0.02)	−0.10(0.04)^**	0.12(0.83)	1.97(1.21)	0.11(0.43)
MAP	M	−0.06(0.03)^*	−0.03(0.02)^*	0.07(0.03)^*	−1.86(0.72)^**	−0.67(1.04)	0.88(0.38)^*
	F	−0.11(0.03)^**	−0.08(0.02)^**	0.05(0.03)	−2.43(0.75)^**	−3.02(1.09)^**	1.74(0.38)^**
Log HOMA-IR	M	−0.13(0.03)^**	−0.09(0.02)^**	0.11(0.03)^**	−3.78(0.73)^**	−3.35(1.06)^**	2.20(0.38)^**
	F	0.01(0.03)	−0.02(0.02)	−0.07(0.03)^*	0.83(0.72)	0.74(1.05)	0.46(0.37)
TG	M	−0.10(0.03)^**	−0.08(0.01)^**	0.09(0.03)^**	−3.43(0.63)^**	−2.22(0.93)^*	2.06(0.33)^**
	F	−0.18(0.03)^**	−0.11(0.02)^**	0.15(0.03)^**	−3.48(0.75)^**	–3.47(1.15)^**	1.81(0.41)^**
HDL	M	–0.07(0.04)	–0.002(0.02)	0.15(0.04)^**	0.73(0.87)	–1.58(1.27)	–0.33(0.47)
	F	0.09(0.03)^**	0.07(0.02)^**	–0.05(0.03)	3.74(0.69)^**	2.98(1.00)^**	–0.61(0.36)

Abbreviations: BPM, beats per minute; cMetS, continuous metabolic syndrome score; F, female; HDL, high-density lipoprotein; HF, high frequency power; HOMA-IR, homeostasis model assessment of insulin resistance; HRV, heart rate variability; LF, low frequency power; Log, logarithm; M, male; MAP, mean arterial pressure; RMSSD, square root of the mean of the sum of the squares of differences between adjacent RR intervals; SDNN, standard deviation of all RR intervals; TG, triglycerides; WC, waist circumference.

The model was adjusted for age, and race.

* and **, P < 0.05; and P < 0.01, respectively.