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Table 1 Comparisons of demographic data between participants with and without metabolic syndrome

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

 

Total (n = 175)

MetS (+) (n = 91)

MetS (−) (n = 84)

P-value

Age, years

65.1 ± 12.9

65.6 ± 12.3

64.6 ± 13.5

0.600

Gender, woman

100 (57.1 %)

52 (57.1 %)

48 (57.1 %)

1.000

Comorbidities

    

 Diabetes mellitus

55 (31.4 %)

47 (51.6 %)

8 (9.5 %)

<0.001

 Hypertension

128 (73.1 %)

67 (73.6 %)

61 (72.6 %)

0.881

  Taking Beta-blockers or ACEi/ARB

56 (32.0 %)

30 (33.0 %)

26 (31.0 %)

0.775

 Hypotension

32 (18.3 %)

13 (14.3 %)

19 (22.6 %)

0.154

  Taking midodrine

16 (9.1 %)

8 (8.8 %)

8 (9.5 %)

0.867

 Heart failure

43 (24.6 %)

22 (24.2 %)

21 (25.0 %)

0.899

 Coronary artery disease

43 (24.6 %)

27 (29.7 %)

16 (19.0 %)

0.103

 Cerebrovascular disease

23 (13.1 %)

13 (14.3 %)

10 (11.9 %)

0.641

 Peripheral arterial disease

13 (7.4 %)

5 (5.5 %)

8 (9.5 %)

0.310

Causes of uremia

   

<0.001

 Diabetic nephropathy

55 (31.4 %)

47 (51.6 %)

8 (9.5 %)

 

 Hypertension

2 (1.1 %)

1 (1.1 %)

1 (1.2 %)

 

 Chronic GN

92 (52.6 %)

35 (38.5 %)

57 (67.9 %)

 

 PCKD

11 (6.3 %)

5 (5.5 %)

6 (7.1 %)

 

 Chronic IN

4 (2.3 %)

1 (1.1 %)

3 (3.6 %)

 

 Others

11 (6.3 %)

2 (2.2 %)

9 (10.7 %)

 

Baseline data

    

 Waist Circumference, cm

86.1 ± 11.0

90.1 ± 11.2

81.1 ± 8.6

<0.001

 Cardio-Thoracic Ratio, %

0.52 ± 0.05

0.52 ± 0.05

0.52 ± 0.05

0.611

 Blood Urea Nitrogen, mg/dL

74.7 ± 20.1

73.9 ± 19.5

75.6 ± 20.7

0.578

 Creatinine, mg/dL

10.5 ± 3.5

10.9 ± 4.3

10.2 ± 2.2

0.163

 Kt/V

1.43 ± 0.24

1.37 ± 0.23

1.50 ± 0.23

<0.001

 Urea Reduction Ratio,  %

78.4 ± 54.8

81.5 ± 75.4

75.1 ± 10.1

0.441

 Calcium, mg/dL

9.1 ± 0.7

9.1 ± 0.7

9.0 ± 0.7

0.851

 Phosphate, mg/dL

4.9 ± 1.7

5.1 ± 1.6

4.7 ± 1.8

0.155

 Calcium × Phosphate, (mg/dL)2

44.6 ± 15.7

46.1 ± 14.3

43.0 ± 16.9

0.192

 Albumin, g/dL

3.8 ± 0.3

3.8 ± 0.3

3.7 ± 0.3

0.097

 Potassium, mEq/L

4.7 ± 0.8

4.8 ± 0.8

4.6 ± 0.7

0.159

 i-PTH, ug/L

285.5 ± 481.1

204.7 ± 242.9

373.1 ± 637.5

0.025

 Hemoglobin, g/dL

9.7 ± 1.4

9.7 ± 1.4

9.7 ± 1.4

0.793

 Hematocrit, %

30.2 ± 4.2

30.0 ± 4.1

30.4 ± 4.3

0.492

 White blood cell, ×109/L

6.3 ± 2.1

6.4 ± 1.9

6.2 ± 2.4

0.532

 Total cholesterol, mg/dL

163.0 ± 35.5

167.8 ± 36.1

157.9 ± 34.3

0.066

 Triglyceride, mg/dL

157.8 ± 132.0

208.0 ± 142.0

103.5 ± 94.5

<0.001

 Low-density lipoprotein, mg/dL

98.1 ± 30.3

105.2 ± 30.5

90.5 ± 28.3

0.001

 High-density lipoprotein, mg/dL

35.6 ± 18.7

25.0 ± 11.6

47.2 ± 18.1

<0.001

 Sugar (postprandial), mg/dL

148.2 ± 54.9

160.5 ± 65.5

134.9 ± 36.2

0.001

 Glycated hemoglobin, %

7.1 ± 1.5

7.2 ± 1.5

6.8 ± 1.5

0.331

At the index HD

    

 Dry weight, kg

57.6 ± 29.6

63.5 ± 39.6

51.4 ± 7.9

0.007

 Actual UF, kg

2.22 ± 0.94

2.34 ± 0.92

2.10 ± 0.96

0.083

 %UF, %

4.02 ± 1.65

3.97 ± 1.55

4.07 ± 1.76

0.680

 MAP-0, mmHg (MAP-1)

90.5 ± 17.0

93.1 ± 16.9

87.7 ± 16.7

0.036

 SBP-0, mmHg (SBP-1)

129.0 ± 26.1

134.2 ± 23.6

123.4 ± 27.7

0.006

 DBP-0, mmHg (DBP-1)

71.7 ± 13.0

73.4 ± 13.2

70.0 ± 12.6

0.081

 MAP-1, mmHg (MAP-2)

89.9 ± 17.2

91.3 ± 17.6

88.3 ± 16.8

0.255

 SBP-1, mmHg (SBP-2)

125.8 ± 28.6

128.2 ± 27.6

123.2 ± 29.6

0.254

 DBP-1, mmHg (DBP-2)

70.8 ± 15.9

72.2 ± 16.0

69.3 ± 15.7

0.237

 HR-1,/min (HR-1)

74.1 ± 6.5

74.1 ± 6.2

74.1 ± 6.9

0.990

 MAP-2, mmHg (MAP-3)

87.5 ± 16.6

87.4 ± 17.5

87.8 ± 15.6

0.870

 SBP-2, mmHg (SBP-3)

123.1 ± 26.1

122.4 ± 27.8

123.9 ± 24.2

0.703

 DBP-2, mmHg (DBP-3)

70.2 ± 12.4

70.7 ± 12.4

69.7 ± 12.5

0.628

 HR-2,/min (HR-2)

75.2 ± 8.2

74.5 ± 7.7

75.9 ± 8.7

0.625

 MAP-3, mmHg (MAP-4)

88.5 ± 16.3

89.0 ± 17.5

88.0 ± 14.9

0.706

 SBP-3, mmHg (SBP-4)

125.7 ± 24.5

126.3 ± 24.7

125.0 ± 24.5

0.714

 DBP-3, mmHg (DBP-4)

70.7 ± 11.8

71.8 ± 11.7

69.5 ± 12.0

0.213

 HR-3,/min (HR-3)

75.6 ± 8.2

75.4 ± 7.4

75.9 ± 9.1

0.728

  1. Values are presented as mean ± standard deviation or number (%) unless otherwise stated. P-value was calculated using Chi square test and independent student’s t-test. Baseline laboratory data were the pre-dialysis data obtained when patients receiving HRV measurement
  2. ACEi angiotensin converting enzyme inhibitor, ARB angiotensin receptor blocker, CCB calcium-channel blocker, DBP diastolic blood pressure, GN glomerulonephritis, IN interstitial nephritis, i-PTH intact-parathyroid hormone, MAP mean arterial pressure, PCKD polycystic kidney disease, SBP systolic blood pressure, UF ultrafiltration, %UF ultrafiltration divided by body weight