Table III.

Comparison of access outcomes and interventions in different groups.

	Secondary access patency		Access interventions per year
Comparison	HR (95% CI)	P-value	Rate ratio	P-value
All AVG vs all AVF	1.06 (0.83–1.35)	.64	2.50 (2.22–2.78)	<.0001
AVF-1 vs AVF-0	1.84 (1.30–2.60)	< .0001	1.81 (1.49–2.20)	< .0001
AVG-1 vs AVG-0	1.98 (1.52–4.02)	< .0001	1.49 (1.27–1.74)	< .0001
AVG-0 vs AVF-0	1.28 (0.91–1.78)	.16	3.18 (2.70–3.76)	< .0001
AVF-1 vs AVG-0	1.45 (1.08–2.01)	.01	0.57 (0.49–0.66)	< .0001

AVF-1, AVF with interventions prior to maturation

AVF-0, AVF without intervention prior to maturation

AVG-1, AVG with interventions prior to successful cannulation

AVG-0, AVG without interventions prior to successful cannulation

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.