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Table 1 Characteristics of the study population

From: Fluid volume expansion and depletion in hemodialysis patients lack association with clinical parameters

Characteristics

All patients (n = 194)

Hypovolemic (n = 17)

Normovolemic (n = 83)

Hypervolemic (n = 94)

P value

VS, L (assessed by BCM)

1.1 ± 2

−2.1 ± 0.6

0.1 ± 0.7a

2.6 ± 1.5b,c

<0.001*

VS/ECFV% (assessed by BCM)

7.8 ± 12

−12 ± 3.4

0.9 ± 4a

17 ± 10b,c

<0.001*

Clinical target weight

72 ± 22

85 ± 28

74 ± 21

69 ± 20c

0.014*

VS, L (clinically assessed)

2.2 ± 2.0

2.1 ± 1.3

1.7 ± 1.5

2.5 ± 2.3b

0.016*

VS/ECFV (clinically assessed)

0.2 + 1.2

11.6 ± 8.2

10 ± 9

16.8 ± 15b

0.001*

Gender, M/F

115/79

10/7

47/36

58/36

0.702

Age, years

61 ± 15

60 ± 16

60 ± 16

62 ± 15

0.788

Diabetes, %

45 %

47 %

3 %

54 %c

0.035*

Smoking, %

11 %

0 %

6 %

17 %c

0.02*

Edema, %

28 %

0 %

9 %

47 %b,c

<0.001*

Obesity, %

26 %

47 %

30 %

19 %b,c

0.001*

Pre-HD-SBP, mmHg

131 ± 25

128 ± 26

129 ± 26

137 ± 25

0.088

Pre-HD-DBP, mmHg

71 ± 16

70 ± 15

72 ± 18

72 ± 16

0.843

Pre-HD-PP, mmHg

60 ± 22

59 ± 29 b

57 ± 19

65 ± 19b

0.025*

Pre-HD-MAP, mmHg

91 ± 17

89 ± 14

91 ± 19

94 ± 17

0.418

HTN, %

45 %

41 %

36 %

54 %c

0.015*

Antihypertensive

48 %

24 %

45 %

54 %

0.057

Intradialytic hypotension

17 %

35 %

20 %

11 %b

0.007*

Paradoxical hypertension

31 %

35 %

29 %

32 %

0.840

Plasma sodium, mmol/L

136 ± 3

136 ± 2.6

137 ± 3

135.5 ± 3c

0.002*

Serum potassium, mEq/L

4.7 ± 0.6

4.8 ± 0.6

4.6 ± 0.6

4.8 ± 0.7

0.163

Albumin, g/L

36 ± 3.5

36 ± 4

37 ± 3.

36 ± 3.5

0.184

  1. VS volume status, VS/ECFV volume status/extracellular fluid volume, pre-HD-SBP pre-hemodialysis systolic blood pressure, pre-HD-DBP pre-hemodialysis diastolic blood pressure, pre-HD-PP pre-hemodialysis pulse pressure, pre-HD-MAP pre-hemodialysis mean arterial pressure, HTN hypertension
  2. *P < 0.05
  3. aSignificant difference between hypovolemic and normovolemic
  4. bSignificant difference between hypovolemic and hypervolemic
  5. cSignificant difference between normovolemic and hypervolemic