Table 2.

Comparison of annual frequency of vascular access procedures and CRB between patents with an initial AVF surgery, AVG surgery, or no access surgery

ParameterAVFAVGCVCP ValueP Value
AVF versus AVGAVF versus CVC
No. of patients29511371
CVC exchange, n per patient-yr (95% CI)0.49 (0.44 to 0.53)0.50 (0.44 to 0.57)3.55 (3.09 to 4.07)0.19<0.001
Angioplasty, n per patient-yr (95% CI)0.63 (0.58 to 0.68)0.58 (0.52 to 0.66)0.68
Thrombectomy, n per patient-yr (95% CI)0.35 (0.31 to 0.38)0.52 (0.45 to 0.59)0.004
All percutaneous procedures, n per patient-yr (95% CI)1.46 (1.39 to 1.54)1.61 (1.49 to 1.73)3.55 (3.09 to 4.07)0.060.002
Surgical access revisions, n per patient-yr (95% CI)0.42 (0.38 to 0.47)0.19 (0.15 to 0.24)<0.001
Access creations, n per patient-yr (95% CI)0.59 (0.54 to 0.64)0.43 (0.37 to 0.49)<0.001
All surgical procedures, n per patient-yr (95% CI)1.01 (0.95 to 1.08)0.62 (0.55 to 0.70)<0.001
All access procedures, n per patient-yr (95% CI)2.48 (2.38 to 2.58)2.23 (2.09 to 2.37)0.69
CRBs, n per patient-yr (95% CI)0.60 (0.55 to 0.65)0.60 (0.53 to 0.68)4.63 (4.09 to 5.21)0.23<0.001
Hospitalizations for CRB, n per patient-yr (95% CI)0.24 (0.22 to 0.28)0.18 (0.14 to 0.22)2.06 (1.71 to 2.46)0.32<0.001
  • The frequency of access events or procedures between subgroups (AVF versus AVG, AVF versus CVC, and failed versus successful AVFs) was assessed using negative binomial models to account for the relatively high number of patients with zero counts. 95% CI, 95% confidence interval.