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Table 3 Hierarchical multiple regression model for number of leads through CV in the study sample

From: Sex-related differences regarding cephalic vein lead access for CIEDs implantation

Number of leads through CV B SE 95% CI for B Beta R2
Lower Upper
Step 1 Male sex  − 0.07 0.15  − 0.37 0.23  − .05 0.006
Age  − 0.004 0.01  − 0.02 0.01  − .06
Constant 1.08 0.57  − 0.05 2.2  
Step 2 Male sex  − 0.16 0.11  − 0.39 0.07  − .13 0.482
Age  − 0.004 0.01  − 0.02 0.01  − .06
CV diameter 0.04 0.04 −0.04 0.11 .09
Angle of entrance 0.83 0.12 0.6 1.06 .61**
Number of valves ≤ 1 0.34 0.11 0.12 0.55 .27*
Constant 0.25 0.44 −0.63 1.12  
  1. R2 = .006 for Step 1; Δ R2 = .476 for Step 2 (P < 0.001) *p < 0.01, **p < 0.001