Table 1.

Initial characteristics of the samplea

CharacteristicCatheter(n = 139)PTFE Graft(n = 171)Native AVF(n = 1366)Total CasesP
Men (%)46.346.263.160.0<0.001b
Age (yr)69.1 (10.6)66.6 (12.5)63.6 (13.9)64.3 (13.6)<0.001b
Time on HD (mo)13.9 (7.2)16.0 (6.9)15.5 (7.0)15.4 (7.0)<0.03c
BMI25.4 (5.1)25.9 (4.8)25.3 (4.3)25.3 (4.4)NS
Diabetes (%)38.137.423.225.9<0.001b
Charlson index7.6 (2.4)7.1 (2.4)6.4 (2.2)6.5 (2.3)<0.001b
Kt/V Daugirdas (mean [SD])1.58 (0.34)1.76 (0.35)1.66 (0.43)1.66 (0.42)<0.01d
    % with kT/V >1.378.593.884.384.7<0.005
Serum albumin (g/L; mean [SD])36.1 (4.3)37.7 (4.1)38.2 (4.4)38.0 (4.4)<0.005e
iPTH >400 pg/dl (%)13.213.414.114.0NS
Anemia
    baseline Hb (mean [SD])11.4 (1.5)11.6 (1.5)11.7 (1.4)11.6 (1.4)<0.03f
    Hb >12.0 g/dl (%)37.642.339.839.9
    Hb >10.0 and <12.0 g/dl (%)42.841.847.546.5
    Hb <10.0 g/dl (%)19.615.912.713.6
Ferrokinetics
    ferritin >100 ng/ml (%)86.789.389.889.5NS
    TSI >20% (%)68.676.077.476.6NS
    Fe2+ treated intravenously (%)80.683.078.679.2NS
EPO
    treated (%)96.497.194.494.8NS
    U/kg per wk125.5 (69.3)120.4 (74.9)109.1 (70.6)111.7 (71.1)<0.02f
    ERI11.5 (6.9)10.9 (7.7)9.8 (7.1)10.1 (7.2)<0.02f
  • a Data for subgroups according to type of vascular access (VA), and comparisons between subgroups according to ANOVA (continuous variables) and comparison of proportions. AVF, arteriovenous fistula; BMI, body mass index; EPO, erythropoietin; ERI, erythropoietin resistance index; HD, hemodialysis; iPTH, intact parathyroid hormone; PTFE, polytetrafluoroethylene graft; TSI, transferrin saturation index.

    Bonferroni/Tahmane tests for multiple comparisons:

  • b Native AVF versus all others,

  • c catheter versus native AVF,

  • d PTFE graft versus all others,

  • f catheter versus all others,

  • e catheter versus all others.