Long-term outcome of percutaneous transluminal renal angioplasty (PTRA) versus PTRA with stenting (PTRAS) in transplant renal artery stenosis

Table 3 Results of Doppler ultrasound compared between the PTRA and PTRAS groups

Doppler ultrasound	Overall (n = 65)	PTRA (n = 34)	PTRAS (n = 31)	p value
PSV
Pre	380.6 ± 116.9	374.9 ± 115.2	386.2 ± 120.2	0.714^a
Post	229.3 ± 78.9	225.4 ± 52.4	233.7 ± 102.2	0.789^c
Velocity gradient
Pre	2.86 ± 1.50	2.83 ± 1.76	2.89 ± 1.23	0.867^a
Post	1.53 ± 0.57	1.53 ± 0.57	1.53 ± 0.57	0.618^d
Resistive Index
Pre	17/60 (28.3%)	10/30 (33.3%)	7/30 (23.3%)	0.352^b
Post	12/49 (24.5%)	8/26 (30.8%)	4/23 (17.4%)	0.542^b

Data presented as number and percentage or mean ± standard deviation
PTRA, percutaneous transluminal renal angioplasty; PTRAS, percutaneous transluminal renal angioplasty with stenting; PSV, peak systolic velocity
A p-value < 0.05 indicates statistical significance
^aIndependent-Sample t-test
^bChi-Square test
^cAnalysis of covariance (ANCOVA) was performed to assess independent differences in the level of post-PSV between group, after adjustment for pre-PSV and restenosis progression after PTRA/PTRAS
^dAnalysis of covariance (ANCOVA) was performed to assess independent differences in the level of post-Velocity gradient between group, after adjustment for pre-Velocity gradient and restenosis progression after PTRA / PTRAS

ISSN: 1471-2261