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Table 1 Baseline characteristics

From: Quality of life as indicator of poor outcome in hemodialysis: relation with mortality in different age groups

Demographics

< 65 years

65–74 years

≥ 75 years

 

(n = 328)

(n = 212)

(n = 174)

p value

 Age (years)

51.9 ± 9.8

70.3 ± 2.8

79.4 ± 3.3

 

 Sex (% male)

60%

63%

66%

0.41

 High educational statusa

22%

17%

22%

0.30

Vascular access

  arteriovenous fistula

84%

78%

72%

0.01

  graft

11%

12%

20%

0.03

  central venous catheter

5%

9%

8%

0.16

 Diastolic blood pressure (mmHg)b

80 ± 11

73 ± 12

70 ± 11

<0.001

 Systolic blood pressure (mmHg)b

148 ± 21

148 ± 20

147 ± 24

<0.001

 Time on RRT (years)

3.1 ± 3.2

2.8 ± 2.6

2.7 ± 2.3

0.16

 Dialysis frequency 3×/week

95%

93%

91%

0.17

 Session time (hours)

3.8 ± 0.4

3.8 ± 0.3

3.7 ± 0.4

0.02

 Residual renal functionc

48%

54%

60%

0.04

 Body mass index (kg/m2)

25.2 ± 5.1

25.8 ± 4.59

25.3 ± 4.4

0.30

 Current smoker

26%

16%

10%

<0.001

 Diabetes Mellitus

24%

29%

21%

0.24

 Cardiovascular disease

31%

52%

59%

<0.001

 Kt/v urea

1.40 ± 0.22

1.40 ± 0.21

1.38 ± 0.21

0.62

 Hemoglobin (mmol/L1)

7.3 ± 0.8

7.3 ± 0.8

7.4 ± 0.7

0.46

 Albumin (g/L)

41.0 ± 3.9

40.2 ± 3.8

39.4 ± 3.5

<0.001

 Phosphate (mmol/L)

1.74 ± 0.52

1.59 ± 0.47

1.51 ± 0.43

<0.001

Health related QoL domains

 Physical functioning

60 ± 27

48 ± 28

40 ± 28

< 0.001

 Role physical

47 ± 43

41 ± 44

39 ± 44

0.10

 General health

43 ± 21

44 ± 21

44 ± 19

0.26

 Bodily pain

73 ± 26

69 ± 28

70 ± 28

0.44

 Emotional health

71 ± 20

73 ± 21

77 ± 18

0.02

 Role emotional

68 ± 43

65 ± 44

68 ± 43

0.63

 Social functioning

68 ± 27

69 ± 29

67 ± 28

0.78

 Vitality

54 ± 21

53 ± 23

53 ± 21

0.99

  1. Legend: values are means +/− SD, median (interquartile range) or number (percentage), RRT renal replacement therapy, Kt/V urea fractional clearance of body water of urea, QoL quality of life
  2. aUniversity bBefore dialysis cResidual kidney function if diuresis ≥100 ml/24 h
  3. P value reflects the result of a univariable model (ANOVA or chi-square test)