Table 1. Baseline characteristics of persons starting chronic hemodialysis by timing of access creation

VariableEarlyb Access Creation (n = 1240)Just Priorc Access Creation (n = 997)Late Accessd Creation (n = 3687)P-valuee
OverallEarly vs LateJust Prior vs Late
a Comorbidity index is the Charlson-Deyo Index modified by subtracting the renal disease and diabetes components.
b Early access creation group is the creation of a fistula or graft at least 4 mo prior to starting hemodialysis.
c Just prior creation is the creation of a fistula or graft between 4 and 1 mo prior to starting hemodialysis.
d Late creation is the creation of a fistula or graft within 1 mo or after starting hemodialysis.
e Overall P-values calculated using ANOVA for continuous variables and chi-square tests for categorical variables. Permutation-style adjusted P-values were calculated for multiple comparisons.
Age, mean ± SD60 ± 1559 ± 1661 ± 160.0010.0250.007
Male, %64.466.661.50.0060.1210.006
Diabetes, %42.947.746.30.0490.0710.657
Comorbidity index,a %
    059.455.841.3<0.001<0.001<0.001
    118.021.923.2
    213.512.218.0
    3+9.110.117.5
Inpatients start, %22.323.568.8<0.001<0.001<0.001
Fistula as 1st access, %88.184.376.5<0.001<0.001<0.001
Income quintile, mean ± SD2.8 ± 1.42.8 ± 1.42.8 ± 1.40.4000.4290.558
Catheter use, %35.942.589.1<0.001<0.001<0.001