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Table 2 Comparisons of the impacts on heart rate variability indices from metabolic syndrome and its five components

From: Impact of metabolic syndrome and its components on heart rate variability during hemodialysis: a cross-sectional study

 

MetS [(+) n = 91] vs [(−) n = 84]

Components of MetS

WC [(+) n = 79] vs [(−) n = 96]

BP [(+) n = 128] vs [(−) n = 47]

FPG [(+) n = 65] vs [(−) n = 110]

TG [(+) n = 63] vs [(−) n = 112]

HDL [(+) n = 125] vs [(−) n = 50]

HRV-0

      

 VLF-0

↓#

↓#

NS

↓#

↓#

NS

 LF-0

NS

NS

NS

↓#

NS

NS

 HF-0

NS

NS

NS

↓#

NS

NS

 LF/HF-0

NS

NS

NS

NS

NS

NS

 TP-0

↓#

NS

NS

↓#

NS

NS

 Var-0

↓#

NS

NS

↓#

↓#

NS

HRV-1

      

 VLF-1

NS

NS

NS

↓#

NS

NS

 LF-1

NS

NS

NS

NS

NS

NS

 HF-1

NS

NS

NS

NS

NS

NS

 LF/HF-1

NS

NS

NS

NS

NS

NS

 TP-1

NS

NS

NS

↓#

NS

NS

 Var-1

NS

NS

NS

↓#

NS

NS

HRV-2

      

 VLF-2

NS

NS

NS

↓#

NS

NS

 LF-2

NS

NS

NS

NS

NS

NS

 HF-2

NS

NS

NS

NS

NS

NS

 LF/HF-2

NS

NS

NS

NS

NS

NS

 TP-2

↓#

NS

NS

↓#

NS

NS

 Var-2

↓#

NS

NS

↓#

NS

NS

HRV-3

      

 VLF-3

NS

↓#

NS

↓##

NS

NS

 LF-3

NS

NS

NS

↓#

NS

NS

 HF-3

NS

NS

NS

↓#

NS

NS

 LF/HF-3

NS

NS

NS

↓#

NS

NS

 TP-3

NS

NS

NS

↓##

NS

NS

 Var-3

↓#

NS

NS

↓##

NS

NS

  1. Values are presented as mean. p-value was calculated using independent student’s t-test. HRV-0, -1, -2, and -3 were HRV measured before HD, and at initial, middle, and late phases of the index hemodialysis session, respectively
  2. ↑ and ↓ denote higher and lower value in participants met the criterion comparing with those didn’t meet the criterion. # p 0.05, ## p 0.001 in the comparison. The data with significant differences were expressed as mean mean ± standard deviation
  3. Units: Ln(ms2) in VLF, LF, HF, TP, and Var; Ln(ratio) in LF/HF ratio
  4. BP blood pressure, FPG fasting plasma glucose, HDL high-density lipoprotein, HF high frequency, HRV heart rate variability, LF low frequency, MetS metabolic syndrome, NS not significant, TG triglycerides, TP total power, Var variance of the R–R intervals, VLF very low frequency, WC waist circumference