Table 3.

Cox's regression of time to final failure of the primary permanent vascular access

	Overall (n = 246) univariate		Overall (n = 246) multivariate		AVF only (n = 211) univariate		AVF only (n = 211) multivariate
	HR (CI)	P-value	HR (CI)	P-value	HR (CI)	P-value	HR (CI)	P-value
Female	2.13 (1.36–3.35)	0.001	1.98 (1.23–3.19)	0.005	2.08 (1.25–3.46)	0.005	2.20 (1.29–3.73)	0.004
Age	1.01 (0.99–1.03)	0.3	1.00 (0.98–1.02)	0.8	1.00 (0.98–1.02)	0.8	0.99 (0.97–1.01)	0.3
BMI	0.99 (0.94–1.04)	0.6	1.00 (0.95–1.05)	0.9	0.99 (0.93–1.04)	0.6	0.99 (0.93–1.04)	0.6
DM	1.31 (0.84–2.05)	0.2	1.37 (0.83–2.25)	0.2	1.52 (0.91–2.52)	0.1	1.50 (0.85–2.66)	0.2
Vascular disease	2.22 (1.38–3.57)	0.001	2.32 (1.39–3.89)	0.001	2.07 (1.21–3.54)	0.008	2.24 (1.26–3.97)	0.006
AID	1.76 (0.90–3.41)	0.1	1.93 (0.95–3.92)	0.07	2.01 (0.95–4.23)	0.07	2.14 (0.99–4.65)	0.06
Malignoma	1.67 (1.04–2.66)	0.032	1.54 (0.93–2.57)	0.09	1.40 (0.80–2.43)	0.2	1.65 (0.92–2.96)	0.09
AVF	1.00		1.00
AVG	3.14 (1.64–6.01)	0.001	2.52 (1.29–4.92)	0.007
PC	2.22 (1.00–4.91)	0.050	1.95 (0.85–4.45)	0.1

Follow-up cut at 4 years, events overall: 78, events AVF: 60. BMI, body mass index; DM, diabetes mellitus; AID, autoimmune disease; AVF, native arterio-venous fistula; AVG, arterio-venous graft; PC, permanent catheter.