Table 1 Baseline patient characteristics

Demographics

 Ages (years)

67 (58.0, 72.25)

64 (54.25, 71.00)

71 (66.75, 75.00)

 < 0.001

 Male gender, n (%)

151 (65.65)

102 (62.20)

49 (74.24)

0.08

Comorbidities

 Catheter at 1st HD, n (%)

103 (44.78)

67 (40.85)

36 (54.55)

0.06

 Diabetes mellitus, n (%)

96 (41.74)

62 (37.80)

34 (51.52)

0.06

 IHD, n (%)

41 (17.83)

22 (13.41)

19 (28.79)

0.006

 Hypertension, n (%)

180 (78.26)

132 (80.49)

48 (72.73)

0.18

 CVA, n (%)

53 (23.04)

28 (17.07)

25 (37.88)

0.001

 COPD, n (%)

15 (6.52)

11 (6.70)

4 (6.06)

1.00

Laboratory Variables

 Hb ^a (g/L)

85.00 (70.00, 106.00)

87.36 ± 23.73

88.00 (71.00, 109.25)

0.75

 WCC (× 10^9/L)

6.40 (4.74, 9.12)

6.29 (4.77, 8.98)

6.92 (4.60, 9.42)

0.71

 Neutrophil (× 10^9/L)

5.22 (3.55, 8.10)

4.98 (3.64, 7.76)

5.77 (3.10, 8.44)

0.57

 Lymphocytes ^a (× 10^9/L)

0.64 (0.41, 0.92)

0.69 (0.46, 0.97)

0.58 ± 0.34

0.001

 Monocytes ^a (× 10^9/L)

0.50 (0.31, 0.70)

0.52 (0.33, 0.72)

0.50 ± 0.28

0.19

 NWR

0.83 (0.74, 0.92)

0.79 (0.73, 0.87)

0.97 (0.87, 7.80)

 < 0.001

 LWR

0.10 (0.060, 0.16)

0.11 (0.07, 0.16)

0.08 (0.03, 0.14)

0.12

 MWR

0.07 (0.05, 0.10)

0.08 (0.06, 0.10)

0.06 (0.04, 0.10)

0.65

 NLR

7.81 (4.57, 15.34)

7.07 (4.40, 13.13)

10.57 (5.20, 26.24)

0.02

 MNR

0.09 (0.06, 0.14)

0.10 (0.07, 0.14)

0.08 (0.05, 0.13)

0.07

 MLR

0.74 (0.47, 1.25)

0.72 (0.48, 1.14)

0.85 (0.51, 1.43)

0.10

 PMR

337.92 (209.52, 497.58)

341.54 (205.70, 504.41)

325.00 (215.33, 482.01)

0.89

 PLR

242.91 (153.18, 420.13)

231.58 (152.77, 393.84)

289.89 (157.87, 488.15)

0.07

 PNR

30.73 (19.05, 46.30)

32.38 (21.59, 47.09)

25.42 (16.98, 45.93)

0.15

 Albumin ^a (g/L)

33.60 (30.00, 39.70)

33.84 ± 5.83

33.80 (29.25, 38.33)

0.99

 Ferritin (ug/L)

433.10 (157.70, 997.50)

412.00 (173.20, 898.25)

536.30 (125.40,1112.30)

0.45

 Total cholesterol ^a (mmol/L)

3.45 ± 1.03

3.51 ± 1.09

3.29 ± 0.84

0.14

 HDL (mmol/L)

0.94 (0.76, 1.17)

0.95 (0.76, 1.16)

0.90 (0.79, 1.18)

0.91

 LDL ^a (mmol/L)

1.80 (1.34, 2.36)

1.79 (1.39, 2.39)

1.75 ± 0.65

0.34

 Triglycerides (mmol/L)

1.47 (1.05, 2.21)

1.55 (1.05, 2.26)

1.41 (1.03, 2.02)

0.36

 CRP (mg/L)

61.92 (17.21, 138.03)

51.39 (16.45, 137.24)

77.50 (25.50, 161.10)

0.13

 TnT (pg/ml)

79.25 (36.43, 170.25)

63.90 (31.74, 127.80)

170.00 (72.20, 294.20)

 < 0.001

 ESR ^a

74.00 (43.75, 96.50)

81.00 (44.00, 98.00)

68.57 ± 30.34

0.85

 PCT (ng/L)

1.81 (0.71, 6.25)

1.60 (0.66, 3.83)

3.55 (0.93, 30.33)

0.002

 PLT ^a (× 10^9/L)

155.50 (110.75, 218.75)

173.86 ± 81.78

140.00 (103.25, 188.50)

0.09

 Phosphate ^a (mmol/L)

1.63 (1.30, 2.25)

1.69 (1.39, 2.44)

1.63 ± 0.58

0.049

 Calcium (mmol/L)

1.93 (1.77, 2.10)

1.90 (1.74, 2.06)

1.98 (1.85, 2.13)

0.06

 D-dimer (mg/L)

1.75 (1.00, 3.77)

1.39 (0.80, 2.69)

2.67 (1.77, 5.43)

 < 0.001

 EF (%)

57.56 (53.00, 65.00)

61.0 (53.25, 65.00)

60.00 (47.00, 65.00)

0.15

 BNP, n (%)

97 (42.17)

57 (34.76)

40 (60.61)

0.02

 PTH (pg/ml)

244.20 (145.40, 411.91)

264.78 (154.86, 410.38)

191.94 (110.83, 420.49)

0.21

 Creatinine ^a (umol/L)

696.80 (494.25, 989.50)

740.90 (538.50, 1030.25)

638.94 ± 284.43

0.004

Clinical course

 Use of respiratory support

 < 0.001

  Noninvasive, n (%)

40 (17.39)

23 (14.02)

17 (25.76)

  Invasive, n (%)

34 (14.78)

17 (10.37)

17 (25.76)

  Use of corticosteroid, n (%)

100 (43.48)

75 (45.73)

25 (15.24)

0.03

  Use of antiviral, n (%)

67 (29.13)

47 (28.66)

20 (30.30)

0.80

  Use of ACEI or ARB, n (%)

54 (23.48)

38 (23.17)

16 (24.24)

0.86

  Use of anticoagulant, n (%)

38 (16.52)

29 (17.68)

9 (13.64)

0.558

  ICU stay, n (%)

73 (31.74)

41 (25.00)

32 (48.48)

0.001

 CT chest

 < 0.001

  Grade 1, n (%)

18 (7.83)

15 (9.15)

3 (4.55)

  Grade 2, n (%)

72 (31.30)

59 (35.98)

13 (19.70)

  Grade 3, n (%)

82 (35.65)

58 (35.37)

24 (36.36)

  Grade 4, n (%)

49 (21.30)

27 (16.46)

22 (33.33)