Skip to main content

Advertisement

Springer Nature is making SARS-CoV-2 and COVID-19 research free. View research | View latest news | Sign up for updates

Table 2 Simulation results

From: Purposeful selection of variables in logistic regression

Confounding Non-candidate Inclusion n Purposeful Stepwise Backward Forward
20 0.1 60 5 3.6 6.3 9.1
   120 17.3 15.6 18.2 18.8
   240 39.7 39.6 40.1 30.3
   360 55.2 54.4 54.4 36.6
   480 64.3 64.3 64.3 37.5
   600 65.8 65.7 65.7 41.3
20 0.15 60 9.2 4.6 6.4 8.1
   120 18.7 14.8 17.2 18.5
   240 43.1 37.1 38.2 30.5
   360 56.5 53.7 53.9 37
   480 63.6 62.6 62 43
   600 70.3 69 68.7 41
15 0.1 60 6.6 4.1 6.1 9.6
   120 17.8 15.6 18.6 19.2
   240 39.7 36.6 37.6 29.8
   360 53.3 52.2 52.6 38.3
   480 62.4 62.1 62.1 40.1
   600 68.5 67.9 68 40.2
15 0.15 60 9.7 4.4 6.7 9
   120 21.9 16.8 21.3 19.6
   240 46.6 40.2 41.4 32.3
   360 57.7 52.5 52.5 35.3
   480 64 63.1 63.1 39.3
   600 70.4 69.6 69.6 41.4
  1. Retention of the correct model for purposeful, stepwise, backward, and forward selection methods, under 24 simulated conditions that vary confounding, non-candidate inclusion, and sample size levels.