The Study of Spectral Analysis of Heart Rate Variability in Different Blood Pressure Types in Euvolemic Peritoneal Dialysis Patients

Figures & data

Table 1.  Demographic characteristics of the study population.

Number of patients	62
Male/female	24/38
Age (years)	63 ± 15
Weight (kg)	60 ± 11
Height (cm)	158 ± 9
Body mass index (kg/m^2)	24 ± 3
Dialysis duration (months)	33 ± 21
Etiology of uremia (n, %)
Chronic glomerulonephritis	20 (32)
Diabetes mellitus	9 (15)
Hypertension	11 (18)
Interstitial nephritis	6 (10)
Polycystic kidney disease	2 (3)
Other or unknown causes	14 (23)

Table 2.  Comparisons of demographic characteristics and biochemical variables among the different BP groups.

	HyT group	NT group	HT group	p-Value
Number of patients	7	35	20	NS
Gender (male, %)	3 (43)	14 (40)	7 (35)	NS
Age (years)	66.67 ± 18.17	61.93 ± 12.87	57.08 ± 16.75	NS
Weight (kg)	53.32 ± 10.75	61.01 ± 10.98	59.68 ± 10.24	NS
Height (cm)	153.50 ± 13.31	159.69 ± 7.80	156.46 ± 7.70	NS
BMI (kg/m^2)	22.45 ± 2.10	23.88 ± 3.53	24.30 ± 3.17	NS
Time on PD (months)	32.94 ± 11.24	35.54 ± 24.07	29.50 ± 19.01	NS
Diabetic status (n, %)	0	8 (23)	6 (30)	NS
Serum urea nitrogen (mmol/L)	16.66 ± 5.45,**	22.67 ± 5.18	22.25 ± 6.71	0.021
Creatinine (μmol/L)	749.17 ± 257.96	817.22 ± 332.42	959.83 ± 326.72	NS
Hemoglobin (g/L)	124.17 ± 12.53	120.25 ± 11.62	120.25 ± 13.71	NS
Potassium (mmol/L)	3.70 ± 0.51	4.23 ± 0.57	4.07 ± 0.63	0.043
Albumin (g/L)	37.29 ± 4.79	41.12 ± 3.479	39.85 ± 2.44	0.020
OH (L)	0.62 ± 0.64	1.07 ± 0.73	1.12 ± 0.76	NS
rKT/V	0.32 ± 0.51	0.20 ± 0.36	0.39 ± 0.51	NS
pKT/V	1.39 ± 0.56	1.55 ± 0.27	1.53 ± 0.74	NS
tKT/V	1.71 ± 0.83	1.75 ± 0.45	1.92 ± 0.70	NS
Beta-blockers (n, %)	0	13 (38)	7 (35)	NS
ACE inhibitors (n, %)	0	6 (18)	6 (30)	NS

Notes: BMI, body mass index; OH, overhydration; pKt/V, peritoneal Kt/V; rKt/V, renal Kt/V; tKt/V, total Kt/V (rKt/V + pKt/V); NS, nonsignificant.

*Significantly differed as compared with the NT group.

**Significantly differed as compared with the HT group.

Table 3.  Comparison of HRV indices among the different BP groups.

HRV indices	HyT group	NT group	HT group	p-Value
TP (ms^2)^a	7.82 ± 0.97,**	6.67 ± 1.16	6.23 ± 1.10	<0.05
LF (ms^2)^a	6.26 ± 1.02	5.21 ± 1.35	4.92 ± 1.45	NS
LF [normalized units (nu)]	28.33 ± 17.02**	44.45 ± 20.23	55.69 ± 14.48	0.004
HF (ms^2)^a	6.91 ± 2.02,**	5.17 ± 1.70	4.34 ± 1.84	<0.05
HF [normalized units (nu)]	48.33 ± 8.29**	41.55 ± 14.81	31.23 ±12.03	0.014
LF/HF ratio	0.66 ± 0.55**	1.40 ± 1.36	2.06 ± 0.92	0.021

Notes: ^aBecause the indices of HRV were not normally distributed, log transformation was performed, and the antilog of the mean is presented.

*Significantly differed as compared with the NT group.

**Significantly differed as compared with the HT group.