Table 1 Demographic and clinical data of hemodialysis patients according to intention to get the COVID-19 vaccine

Age (years), mean ± SD

45.25 ± 18.27

46.77 ± 17.88

41.44 ± 17.32

46.08 ± 20.77

0.14

Sex

 Females

114 (48.1)

62 (44.9)

35 (55.6)

17 (47.2)

0.375

 Males

123 (51.9)

76 (55.1)

28 (44.4)

19 (52.8)

Marital status

 Single/divorced/widowed

52 (21.9)

31 (22.5)

14 (22.2)

7 (19.4)

0.925

 Married

185 (78.1)

107 (77.5)

49 (77.8)

29 (80.6)

Occupation

 Unemployed

119 (50.2)

61 (44.2)

35 (55.6)

23 (63.9)

0.018*

 Employed

42 (17.7)

24 (17.4)

13 (20.6)

5 (13.9)

 Retired

28 (11.8)

16 (11.6)

7 (11.1)

5 (13.9)

 Cannot work due to disability

45 (19)

34 (24.6)

8 (12.7)

3 (8.3)

 Student

3 (1.3)

3 (2.2)

0

0

Education level

 Not educated

52 (21.9)

34 (24.6)

7 (11.1)

11 (30.6)

0.215

 Low school

30 (12.7)

17 (12.3)

7 (11.1)

6 (16.7)

 Middle school

90 (38.0)

43 (31.2)

35 (55.6)

12 (33.3)

 High school

2 (0.8)

1 (0.7)

1 (1.6)

6 (16.7)

 College degree

60 (25.3)

41 (29.7)

13 (20.6)

1 (2.8)

 Post-graduate

3 (1.3)

2 (1.4)

Governorate

 Assiut

148 (62.4)

87 (63)

36 (57.1)

25 (69.4)

0.467

 Dakahlia

89 (37.6)

51 (37)

27 (42.9)

11 (30.6)

Residence

 Rural

149 (62.9)

79 (57.2)

40 (63.5)

30 (83.3)

0.016*

 Urban

88 (37.1)

59 (42.8)

23 (36.5)

6 (16.7)

Active lifestyle

158 (66.7)

92 (66.7)

42 (66.7)

24 (66.7)

1

Smoking habit

 Nonsmoker

193 (81.4)

111 (80.4)

55 (87.3)

27 (75)

0.277

 Former smoker

25 (10.5)

15 (10.9)

5 (7.9)

5 (13.9)

 Current Smoker

19 (8)

12 (8.7)

3 (4.8)

4 (11.1)

Family income

 Not enough

61 (25.7)

31 (22.5)

18 (28.6)

12 (33.3)

0.132

 Enough with no saving

156 (65.8)

91 (65.9)

44 (69.8)

21 (58.3)

 Enough and saving

20 (8.4)

16 (11.6)

1 (1.6)

3 (8.3)

Causes of chronic renal failure

 Amyloidosis

1 (0.4)

0

1 (1.6)

0

0.921

 Analgesic nephropathy

10 (4.2)

4 (2.9)

5 (7.9)

1 (2.8)

 Chronic pyelonephritis

5 (2.1)

2 (1.4)

2 (3.2)

1 (2.8)

 Congenital kidney abnormalities

17 (7.2)

11 (8)

5 (7.9)

1 (2.8)

 Diabetes mellitus

9 (3.8)

2 (1.4)

5 (7.9)

2 (5.6)

 Glomerulonephritis

9 (3.8)

5 (3.6)

2 (3.2)

2 (5.6)

 Hypertension

65 (27.4)

45 (32.6)

12 (19)

8 (22.2)

 Hypertension and diabetes mellitus

18 (7.6)

12 (8.7)

4 (6.3)

2 (5.6)

 Hypovolemia

5 (2.1)

2 (1.4)

3 (4.8)

0

 Nephrolithiasis

6 (2.5)

4 (2.9)

1 (1.6)

1 (2.8)

 Pregnancy related

4 (1.7)

2 (1.4)

1 (1.6)

1 (2.8)

 Schistosomiasis

1 (0.4)

1 (0.7)

0

0

 Unknown

87 (36.7)

48 (34.8)

22 (34.9)

17 (47.2)

Disease duration, months, median (min–max)

36 (1–288)

36 (1–288)

36 (1.2–204)

48 (1.2–192)

0.363

Self-rated overall disease activity, median (min–max)

5 (0–10)

5 (0–10)

5 (0–9)

5 (1–10)

0.599

Therapeutic data

 None

31 (13.1)

17 (12.3)

7 (11.1)

7 (19.4)

0.458

 Erythropoietin

151 (63.7)

88 (63.8)

43 (68.3)

20 (55.6)

0.451

 Iron supplementation

153 (64.6)

89 (64.5)

40 (63.5)

24 (66.7)

0.95

 Calcium supplementation

162 (68.4)

97 (70.3)

43 (68.3)

22 (61.1)

0.575

 Vitamin D

117 (49.4)

75 (54.3)

28 (44.4)

14 (38.9)

0.17

 Calcimimetics

14 (5.9)

7 (5.1)

6 (9.5)

1 (2.8)

0.32

 Aluminum hydroxide

5 (2.1)

2 (1.4)

1 (1.6)

2 (5.6)

0.296

 Antihypertensives drugs

132 (55.7)

78 (56.5)

39 (61.9)

15 (41.7)

0.144

 Antidiabetic drugs

33 (13.9)

19 (13.8)

7 (11.1)

7 (19.4)

0.515

Adherence to therapy

204 (86.1)

120 (87)

54 (85.7)

30 (83.3)

0.852

Associated comorbidities

 Diabetes

42 (17.7)

24 (17.4)

11 (17.5)

7 (19.4)

0.958

 Hypertension

167 (70.5)

101 (73.2)

46 (73.0)

20 (55.6)

0.105

 Chronic lung disease

5 (2.1)

4 (2.9)

1 (1.6)

0

0.53

 Ischemic heart disease

13 (5.5)

8 (5.8)

3 (4.8)

2 (5.6)

0.956

COVID-19 infection

History of COVID-19 infection

44 (18.6)

27 (19.6)

11 (17.5)

6 (16.7)

0.893

 Duration, days, median (min–max)

9.5 (0–120)

9 (0–25)

14 (1–120)

4 (1–14)

445

 Hospitalization

13 (29.6)

8 (29.6)

5 (45.5)

0

0.202

 ICU admission

1 (2.3)

0

1 (9.5)

0

0.256

COVID-19 among relatives

65 (27.4)

41 (29.7)

12 (19)

12 (33.3)

0.202

 Hospitalization

21 (8.9)

14 (10.1)

2 (3.2)

5 (13.9)

0.141

 Death

20 (8.4)

13 (9.4)

3 (4.8)

4 (11.1)

0.449