Table 2 Basal demographic and clinical characteristics of patients in accordance with non-adherence to haemodialysis parameters

Global

<  3%DW

3–3.99%DW

≥ 4%DW

100%

<  100%

≤ 5.5

>  5.5

255 (100)

75 (29.5)

83 (32.5)

97 (38)

p

123 (48.2)

132 (51.8)

p

149 (58.4)

106 (41.6)

p

Age, years

50 ± 13.1

54.4 ± 13.8

50 ± 12.6

46.4 ± 12

<  0.001

51.7 ± 13.2

48.3 ± 12.8

0.29

50.6 ± 13.7

49 ± 12.3

0.35

Sex (female)

95 (37.2)

23 (30.7)

33 (39.8)

39 (40.2)

0.37

47 (38.2)

48 (36.4)

0.76

57 (38.3)

38 (35.8)

0.69

Race (non-white)

218 (85.5)

63 (84)

68 (81.9)

87 (89.7)

0.3

99 (80.5)

119 (90.2)

0.029

130 (87.2)

88 (83)

0.34

Diabetes Mellitus (yes)

41 (16.1)

11 (14.7)

16 (19.3)

14 (14.4)

0.62

26 (21.1)

15 (11.4)

0.034

22 (14.8)

19 (17.9)

0.49

Systemic arterial hypertension (yes)

231 (90.6)

62 (82.7)

79 (95.2)

90 (92.8)

0.017

115 (93.5)

116 (87.9)

0.12

136 (91.3)

95 (89.6)

0.65

Cardiovascular or cerebrovascular disease (yes)

84 (32.9)

27 (36)

28 (33.7)

29 (29.9)

0.68

46 (37.4)

38 (28.8)

0.14

51 (34.2)

33 (31.1)

0.6

Smoking (yes)

100 (39.2)

32 (42.7)

30 (36.1)

38 (39.2)

0.70

47 (38.2)

53 (40.2)

0.75

54 (36.2)

46 (43.4)

0.24

  < 24

91 (35.7)

30 (40)

34 (41)

27 (27.8)

0.045

48 (39)

43 (32.6)

0.53

63 (42.3)

28 (26.4)

0.03

 24–59

81 (31.8)

29 (38.7)

22 (26.5)

30 (30.9)

36 (29.3)

45 (34.1)

44 (29.5)

37 (34.9)

  ≥ 60

83 (32.5)

16 (21.3)

27 (32.5)

40 (41.2)

39 (31.7)

44 (33.3)

42 (28.2)

41 (38.7)

Vascular access (catheter)

21 (8.3)

11 (14.7)

5 (6)

5 (5.2)

0.053

12 (9.8)

9 (6.8)

0.39

13 (8.7)

8 (7.5)

0.73

Status for kidney transplant (apt)

37 (14.5)

9 (12)

13 (15.7)

15 (15.5)

0.76

17 (13.8)

20 (15.2)

0.76

21 (14.1)

19 (17.9)

0.40

Schooling level up to elementary education

118 (46.3)

36 (48)

41 (49.4)

41 (42.3)

0.59

57 (46.3)

61 (46.2)

0.98

72 (48.3)

46 (43.4)

0.43

BMI (Kg/m²)

23.8 ± 4.3

24.4 ± 4.64

24.1 ± 4.16

23.1 ± 4.22

0.095

24.2 ± 4.25

23.5 ± 4.43

0.2

23.2 ± 4.3

24.7 ± 4.3

0.009

Anuria (yes)

127 (49.8)

20 (26.7)

42 (50.6)

65 (67)

<  0.001

61 (49.6)

66 (50)

0.94

65 (43.6)

62 (58.5)

0.01

spKt/V

1.36 ± 0.34

1.28 ± 0.31

1.37 ± 0.34

1.41 ± 0.34

0.03

1.39 ± 0.33

1.33 ± 0.34

0.19

1.40 ± 0.34

1.30 ± 0.33

0.027

Ultrafiltration (ml/h/Kg)

9.49 ± 3.73

6.18 ± 2.60

8.93 ± 2.41

12.5 ± 2.95

<  0.001

9.42 ± 3.44

9.55 ± 4.0

0.78

9.0 ± 3.86

10.0 ± 3.48

0.03

Serum phosphorus (mg/dL)

5.44 ± 1.67

4.94 ± 1.52

5.16 ± 1.49

6.06 ± 1.74

<  0.001

5.44 ± 1.64

5.43 ± 1.70

0.96

Parathyroid hormone ≥600 pg/mL

55 (21.6)

15 (20)

14 (16.9)

26 (26.8)

0.25

19 (15.4)

36 (27.3)

0.022

25 (16.8)

30 (28.3)

0.027

Serum albumin (g/dL)

3.58 ± 0.46

3.58 ± 0.52

3.55 ± 0.42

3.61 ± 0.45

0.71

3.54 ± 0.45

3.62 ± 0.48

0.19

3.58 ± 0.47

3.59 ± 0.45

0.86

Haemoglobin (g/dL)

11.1 ± 1.45

10.7 ± 1.41

11.2 ± 1.41

11.2 ± 1.49

0.065

11 ± 1.57

11.1 ± 1.34

0.59

10.9 ± 1.46

11.3 ± 1.42

0.07

Period of HD performed /prescribed < 100%

42 (56)

38 (45.8)

52 (53.6)

0.39

75 (50.3)

57 (53.8)

0.58