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Table 5 WHAS data set variables retained in the final models for purposeful selection method under two different settings.

From: Purposeful selection of variables in logistic regression

Purposeful Selection
(20%, 0.1)
p-value Purposeful Selection
(15%, 0.15)
p-value Forward, Backward, Stepwise p-value
AGE <0.0001 AGE <0.0001 AGE <0.0001
SHO 0.0018 SHO 0.0029 SHO 0.0039
HR 0.0025 HR 0.0019 HR 0.0011
MITYPE 0.091 MITYPE 0.0586 MITYPE 0.0149
MIORD 0.1087 AV3 0.0760 AV3 0.0672
BMI 0.2035 MIORD 0.1285   
   BMI 0.2107   
  1. SAS PROC LOGISTIC forward, backward, and stepwise selection methods.