Body mass index contributes to sympathovagal imbalance in prehypertensives

Table 2 Frequency and time domain indices of HRV recorded in supine position of subjects in various groups

Parameters	Group 1	Group 2	Group 3	p values
	(n = 45)	(n = 27)	(n = 36)
FDI
TP (ms²)	980.80 ± 376.80	736.57 ± 245.60**	425.30 ± 186.40***,^###	<0.0001
LF (ms²)	390.40 ± 186.70	382.64 ± 180.40	254.30 ± 130.50**,^##	0.0006
HF (ms²)	548.30 ± 256.80	325.20 ± 136.10***	142.40 ± 78.90***,^###	<0.0001
LF_nu	40.32 ± 19.90	53.90 ± 20.30*	60.56 ± 24.70***	0.0004
HF_nu	57.12 ± 21.80	46.05 ± 18.10*	35.28 ± 12.08***,^#	<0.0001
LF:HF ratio	1.36 ± 0.65	2.34 ± 1.05**	3.76 ± 1.40***,^###	<0.0001
TDI
Mean RR (s)	0.859 ± 0.152	0.804 ± 0.140	0.700 ± 0.120 ***,^#	<0.0001
RMSSD (ms)	34.10 ± 15.30	28.90 ± 11.30	19.25 ± 7.45***,^##	<0.0001
SDNN (ms)	32.40 ± 17.20	28.50 ± 12.20	20.10 ± 9.20**,^#	0.0005
NN50	26.40 ± 11.20	22.64 ± 10.70	17.05 ± 7.80***,^#	0.0003
pNN50	8.90 ± 3.10	7.45 ± 2.50	5.10 ± 1.80***,^##	<0.0001

Data presented are mean ± SD; Data of all parameters listed in this table are nonparametric except Mean RR. Group 1: Normotensive subjects with normal BMI; Group 2: Prehypertensive subjects with normal BMI; Group 3: Prehypertensive subjects with higher BMI; The * mark indicates comparison with normotensive subjects with normal BMI and the ^# mark indicates comparison with prehypertensive subjects with normal BMI. * p < 0.05; ** p <0.01; *** p <0.001; ^# p < 0.05; ^## p <0.01; ^### p <0.001.

ISSN: 1471-2261