Table 1.

Summary results of meta-analyses of patency rates in expanded polytetrafluoroethylene arteriovenous grafts

Follow-Up PeriodPatency MeasureStudy ArmsNumber of ePTFE AccessesPatency Rate (%)95% CII2 (P Value)
6 moPrimary3027885651 to 6289 (<0.001)
Primary-assisted1412815952 to 6788 (<0.001)
Secondary2521268075 to 8488 (<0.001)
12 moPrimary3128394135 to 4792 (<0.001)
Primary-assisted1614044641 to 5174 (<0.001)
Secondary3225557064 to 7591 (<0.001)
18 moPrimary2117003427 to 4192 (<0.001)
Primary-assisted1010503934 to 4570 (<0.001)
Secondary2218715953 to 6588 (<0.001)
24 moPrimary2217332822 to 3389 (<0.001)
Primary-assisted1212323429 to 3968 (<0.001)
Secondary2420535447 to 6192 (<0.001)
  • 95% CI, 95% confidence interval; ePTFE, expanded polytetrafluoroethylene arteriovenous grafts.