Table 2.

One- and 3-year primary, primary assisted, secondary, and functional patency for radiocephalic arteriovenous fistulas, upper arm arteriovenous fistulas, and arteriovenous grafts

Patency Measure	1-yr Patency			3-yr Patency
	Radiocephalic Arteriovenous Fistula	Upper Arm Arteriovenous Fistula	Arteriovenous Graft	Radiocephalic Arteriovenous Fistula	Upper Arm Arteriovenous Fistula	Arteriovenous Graft
Patency measures of VAs excluding VAs that did not mature (n=863), %
Primary	51±3	65±3	47±5	35±3	43±3	13±4
Primary assisted	78±2	81±2	67±5	53±3	52±3	32±5
Secondary	93±1	94±1	94±3	86±2	84±3	78±5
Functional	91±1	92±2	89±3	83±2	83±3	72±6
Patency measures of VAs including VAs that did not mature (n=1041), %
Primary	39±2	59±3	45±5	26±2	39±3	12±4
Primary assisted	59±2	73±2	65±5	40±2	47±3	31±5
Secondary	71±2	85±2	90±3	64±2	75±3	75±5
Functional	67±2	83±2	85±4	62±2	74±3	69±5

Patency rates are percentage of VAs still patent ± SEM. Patients are censored for death and transplantation. VA, vascular access.