Table 2.

Primary, assisted primary and secondary patency rates at 3, 6, 12, and 18 mo with 95% CI and number of AVF at risk at the end of the interval (n)a

Patency3 Mo (%)95% CIn6 Mo (%)95% CIn12 Mo (%)95% CIn18 Mo (%)95% CIn
Patency rate from surgical AVF creation (n = 491 AVF)
    primary7167 to 753195752 to 622124944 to 541023932 to 4625
    assisted primary7773 to 813496965 to 732626459 to 691325953 to 6538
    secondary8177 to 853667571 to 792847065 to 751476762 to 7242
Patency rate from first cannulation (n = 302 AVF)
    primary functional8378 to 882127064 to 761376154 to 68545749 to 6512
    assisted primary functional9289 to 952388580 to 901718378 to 88747770 to 8415
    secondary functional9694 to 982489086 to 941848884 to 92808681 to 9115
  • a Patency starts with 491 AVFs at risk at T = 0, functional patency starts with 302 AVFs at T = 0. CI, confidence interval.