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. Author manuscript; available in PMC: 2017 Jul 1.
Published in final edited form as: J Vasc Surg. 2016 Apr 8;64(1):155–162. doi: 10.1016/j.jvs.2016.02.033

Table IV.

Comparison of AVF outcomes with specific interventions prior to successful use with AVF with no interventions.

Secondary access patency Access interventions per year
Comparison HR (95% CI) P-value Rate ratio P-value
PTA vs no intervention 2.70 (2.02–7.95) < .0001 2.15 (1.59–2.91) < .0001
Stenosis revision vs no intervention 1.71 (.96– 3.79) 0.06 1.49 (1.07–2.07) .02
Transposition vs no intervention 1.56 (1.01–2.59) .047 1.70 (1.34–2.14) < .0001

There were 143 AVFs without an intervention prior to successful use, 31 with PTA (percutaneous transluminal angioplasty), 31 with surgical stenosis revision, and 72 with a transposition procedure.

A HR or rate ratio >1 indicates that the first subgroup has a worse outcome than the second subgroup. A HR or rate ratio <1 indicates that that first subgroup has a better outcome than the second subgroup.