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Table 1 Proportion (s) at which each of the variables entered the final model and average p-value for three automated model selection procedures based on one thousand bootstrap samples

From: Determining relative importance of variables in developing and validating predictive models

Variables

Forward selection

Backward selection

Stepwise selection

 

s

p-value

s

p-value

s

p-value

Age

1.000

0.0003

0.999

0.0002

0.998

0.0003

Baseline WBC

0.991

0.0067

0.957

0.0028

0.951

0.0027

Splenomegay

0.767

0.0424

0.600

0.0071

0.610

0.0071

T-cell immunophenotype

0.748

0.0408

0.593

0.0043

0.588

0.0042

Sex

0.719

0.0493

0.465

0.0141

0.455

0.0137

Mediastinal mass

0.648

0.0576

0.450

0.0056

0.451

0.0055

Hepatomegaly

0.493

0.0621

0.307

0.0111

0.292

0.0108