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Table 1 Baseline characteristics of participants based on blood pressure category

From: Association of physical function with predialysis blood pressure in patients on hemodialysis

Characteristics

Predialysis SBP <110 mmHg

Predialysis SBP 110-129 mmHg

Predialysis SBP 130-159 mmHg

Predialysis SBP ≥160 mmHg

p-value

 

N = 27

N = 92

N = 373

N = 257

 

Age (years)

56.2(15.1)

58.9(14.9)

58.2(14.4)

55.5(13.6)

0.07

Gender

     

  ▪Male

19(70%)

52(57%)

234(63%)

139 (54%)

0.09

Race

     

  ▪White

5(19%)

31(34%)

103 (28%)

39(15%)

<0.001

  ▪African American

14(52%)

48 (52%)

207(56%)

192(75%)

 

  ▪Other *

8(30%)

13(14%)

63(17%)

26(10%)

 

Comorbidities

     

  ▪Coronary Artery Disease

5(19%)

10(11%)

30(8%)

21(8%)

0.26

  ▪Diabetes Mellitus

10(37%)

34(37%)

179(48%)

122(47%)

0.19

  ▪Stroke

1(4%)

5(5%)

15(4%)

12(5%)

0.93

  ▪Heart Failure

7(26%)

18(20%)

75(20%)

42(16%)

0.51

  ▪Peripheral Vascular Disease

4(15%)

12(13%)

34(9%)

22(9%)

0.47

Laboratory Values

     

  ▪Hemoglobin (g/dl)

11.4(1.3)

11.3(1.3)

11.8(3.1)

11.8(2.4)

0.38

  ▪Albumin (g/dl)

3.8 (0.7)

4.0(0.3)

4.0(0.3)

4.0(0.4)

0.02

ESRD Vintage (years) [median, (25th, 75th percentile)]

4.3 (2.1,10.5)

3.2(1.5,6.0)

2.8(1.3,6.0)

3.7(1.7,7.4)

0.08

Number of antihypertensive prescribed [median, (25th, 75th percentile)]

1(0,1)

1.5(0.5, 3)

2(1,3)

3 (2,3)

<0.001

Body Mass Index (kg/m 2 ) ơ

     

  ▪ < 20

0(0%)

8(9%)

13(4%)

10(4%)

0.004

  ▪20-24.99

3 (11%)

24(26%)

100(27%)

88(34%)

 

  ▪25-29.99

6(22%)

32(35%)

109(29%)

75(29%)

 

  ▪30-34.99

10(37%)

13(14%)

80(21%)

41(16%)

 

  ▪ ≥ 35

1(4%)

1(1%)

1(0.2%)

0(0%)

 

Average IDWG (%)

2.8(1.8)

3.2(1.8)

3.4(1.9)

3.5(1.9)

0.005

  1. p-value refers to χ2 test (for gender, race, BMI, and comorbities), linear regression for continuous variables (age, hemoglobin, albumin, hemodialysis vintage, antihypertensives).
  2. *Includes 1 missing race value.
  3. ơIncludes 1 missing value from each of the following categories: <110, 110-129, 130-159.
  4. IDWG: Interdialytic weight gain, expressed as a percentage of predialysis body weight.