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Table 3 Comparison of hemodynamic parameters among groups with different degrees of RAS in TAK patients

From: The performance of duplex ultrasonography for the assessment of renal artery stenosis in Takayasu’s arteritis patients

Parameter

 

Noninvolvement

 < 50% stenosis

50–69% stenosis

70–99% stenosis

Value

P

  

(n = 182)

(n = 40)

(n = 23)

(n = 46)

  

AT

 < 0.07 s

152 (83.5%)

28 (70.0%)

9 (39.1%)

19 (41.3%)

45.328

 < 0.001

 ≥ 0.07 s

30 (16.5%)a

12 (30.0%)b

14 (60.9%)c

27 (58.7%)c

  

RPSV (cm/s)

 

106.00 (87.00, 130.00)a

174.00 (116.00, 227.00)b

219.00 (185.25, 307.50)c

300.00 (195.00, 404.00)c

134.040

 < 0.001

IPSV (cm/s)

 

36.05 ± 11.43ab

39.40 ± 14.77a

31.00 ± 8.31bc

30.26 ± 16.25c

4.973

0.002

IEDV (cm/s)

 

11.85 ± 4.39

11.65 ± 4.88

11.65 ± 3.83

12.61 ± 5.43

0.429

0.732

IRI

 

0.66 ± 0.11ab

0.69 ± 0.11a

0.62 ± 0.10bc

0.57 ± 0.15d

12.450

 < 0.001

RAR

 

0.89 (0.66, 1.16)a

1.11 (0.76, 1.38)b

1.41 (1.07, 1.98)c

2.25 (1.34, 3.45)d

72.282

 < 0.001

RIR

 

3.11 (2.33, 3.95)a

4.72 (2.90, 6.65)b

6.90 (5.92, 9.24)c

10.00 (6.42, 16.65)d

123.597

 < 0.001

  1. The same letter indicates that there was no statistically significant difference between the groups (P > 0.05), and the different letters indicate that the difference between the groups was statistically significant (P < 0.05)