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
| Parameter | AVF | AVG | CVC | P Value | P Value |
|---|---|---|---|---|---|
| AVF versus AVG | AVF versus CVC | ||||
| No. of patients | 295 | 113 | 71 | ||
| 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) | 0.06 | 0.002 |
| 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.