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Table 1 Baseline characteristics stratified with RI at 1 month and 3 months after transplantation

From: Early changes in renal resistive index and mortality in diabetic and nondiabetic kidney transplant recipients: a cohort study

 

Overall

RI < 0.70 1 month

RI < 0.70 1 month

RI ≥ 0.70 1 month

RI ≥ 0.70 1 month

p

  

RI < 0.70 3 months

RI ≥ 0.70 3 months

RI < 0.70 3 months

RI ≥ 0.70 3 months

 

Total patients

1685

661

160

216

648

 

Donor characteristics

 Cardiovascular death (%)

924 (61.4)

296 (52.4)

103 (70.5)

110 (58.8)

415 (68.4)

< 0.001

 Deceased donor (%)

1590 (94.4)

606 (91.7)

150 (93.8)

203 (94.0)

631 (97.4)

< 0.001

 Donor age (years)

50.95 (17.54)

42.12 (15.65)

51.86 (16.09)

50.99 (15.36)

59.72 (15.87)

< 0.001

 Donor with diabetes (%)

95 (5.7)

14 (2.1)

3 (1.9)

13 (6.1)

65 (10.1)

< 0.001

 Donor gender (% Male)

1002 (59.5)

407 (61.6)

90 (56.2)

129 (59.7)

376 (58.0)

0.481

 Cold Ischemia (hours)

17.81 (7.95)

17.36 (8.22)

17.41 (7.49)

17.59 (8.23)

18.43 (7.66)

0.085

Recipient characteristics at time of transplantation

 Diabetes (%)

263 (15.9)

19 (2.9)

18 (11.2)

31 (14.9)

195 (30.5)

< 0.001

 NODAT (%)

214 (12.9)

76 (11.7)

24 (15.1)

23 (11.1)

91 (14.2)

0.379

Hemodialysis time (years)

2.95 (3.34)

3.00 (3.83)

2.79 (2.95)

2.99 (3.33)

2.91 (2.90)

0.902

Age (years)

51.15 (14.78)

41.33 (12.69)

51.00 (12.45)

50.95 (12.88)

61.28 (10.47)

< 0.001

Year of transplantation (%)

     

< 0.001

 1985–1989

44 (2.6)

23 (3.5)

3 (1.9)

6 (2.8)

12 (1.9)

 

 1990–1999

270 (16.0)

120 (18.2)

28 (17.5)

39 (18.1)

83 (12.8)

 

 2000–2009

584 (34.7)

257 (38.9)

69 (43.1)

70 (32.4)

188 (29.0)

 

 2010–2017

787 (46.7)

261 (39.5)

60 (37.5)

101 (46.8)

365 (56.3)

 

Gender (% Male)

1074 (63.7)

440 (66.6)

99 (61.9)

149 (69.0)

386 (59.6)

0.019

BMI (kg/m2)

25.31 (4.88)

24.14 (4.59)

24.86 (4.95)

25.18 (4.67)

26.67 (4.91)

< 0.001

Graft rank (%)

     

0.772

 1

1433 (85.0)

551 (83.4)

139 (86.9)

187 (86.6)

556 (85.8)

 

 2

213 (12.6)

95 (14.4)

19 (11.9)

22 (10.2)

77 (11.9)

 

 3

37 (2.2)

14 (2.1)

2 (1.2)

7 (3.2)

14 (2.2)

 

 4

2 (0.1)

1 (0.2)

0 (0.0)

0 (0.0)

1 (0.2)

 

Perfusion machine (%)

242 (14.4)

38 (5.7)

12 (7.5)

23 (10.6)

169 (26.1)

< 0.001

Double transplantation (%)

26 (1.5)

2 (0.3)

3 (1.9)

3 (1.4)

18 (2.8)

0.004

DGF (%)

320 (19.0)

88 (13.3)

26 (16.2)

45 (20.8)

161 (24.8)

< 0.001

Thymoglobulin (%)

915 (54.4)

373 (56.6)

89 (55.6)

115 (53.2)

338 (52.2)

0.422

IL2-R antibodies (%)

744 (44.3)

271 (41.2)

68 (42.8)

99 (45.8)

306 (47.4)

0.144

Recipients characteristics at 3 months

 SBP (mmHg)

138.54 (15.90)

135.58 (14.86)

135.69 (15.79)

136.80 (14.52)

143.10 (16.45)

< 0.001

 DBP (mmHg)

78.79 (10.57)

81.61 (10.03)

78.81 (9.24)

79.96 (9.35)

75.31 (10.88)

< 0.001

 PP (mmHg)

59.75 (15.19)

53.96 (12.32)

56.88 (13.79)

56.84 (11.93)

67.80 (15.90)

< 0.001

 eGFR (ml/min/1.73 m2)

51.39 (19.09)

56.89 (21.13)

49.71 (16.66)

51.10 (16.56)

45.94 (16.36)

< 0.001

 Proteinuria (g/day)

0.80 (8.39)

1.23 (13.41)

0.43 (0.41)

0.55 (0.87)

0.55 (0.70)

0.648

 Tacrolimus (%)

823 (55.9)

315 (53.0)

68 (47.6)

109 (57.1)

331 (60.7)

0.010

 Ciclosporine (%)

586 (39.8)

267 (44.9)

66 (46.2)

74 (38.7)

179 (32.8)

< 0.001

 Steroids (%)

1408 (95.7)

571 (96.1)

135 (95.1)

180 (94.2)

522 (95.8)

0.711

 MMF (%)

1193 (81.0)

480 (80.8)

116 (81.1)

149 (78.0)

448 (82.2)

0.651

 Azathioprine (%)

234 (15.9)

99 (16.7)

23 (16.1)

34 (17.9)

78 (14.3)

0.602

 m-TOR inhibitors (%)

97 (6.6)

19 (3.2)

13 (9.1)

12 (6.2)

53 (9.7)

< 0.001

 Resistive index M1

0.70 (0.08)

0.63 (0.05)

0.65 (0.04)

0.73 (0.03)

0.77 (0.06)

< 0.001

 Resistive index M3

0.69 (0.08)

0.62 (0.05)

0.73 (0.03)

0.65 (0.04)

0.77 (0.05)

< 0.001

 Resistive index M1 > 0.70

864 (51.3)

0 (0.0)

0 (0.0)

216 (100.0)

648 (100.0)

< 0.001

 Resistive index M3 > 0.70

808 (48.0)

0 (0.0)

160 (100.0)

0 (0.0)

648 (100.0)

< 0.001

  1. Values are mean (SD) or absolute (percentage) of patients
  2. NODAT New Onset Diabetes After transplantation, DGF Delayed Graft Function, BMI Body Mass Index, SBP Systolic Blood Pressure, DBP Diastolic Blood Pressure, PP Pulse Pressure, eGFR estimated Glomerular filtration Rate using MDRD formula, m-TOR Mammalian target of rapamycin, IL2-R interleukin 2 receptor, MMF mycophenolate mofetil