Skip to main content
. Author manuscript; available in PMC: 2012 Oct 22.
Published in final edited form as: Biometrics. 2010 Aug 5;67(2):504–512. doi: 10.1111/j.1541-0420.2010.01466.x

Table 3.

Percentage of times that the predictors have been selected in the 100 replications in the censored simulation studies, when the censoring rate λ is 0.1, 0.5, and 0.9 and ρ is 0 and 4/3 (this corresponding to the maximum correlation between active predictors and inactive predictors are 0 and 0.8.) The first column shows the true coefficients of the 20 predictors in the three studies, which are related to the survival time.

Coefficients (λ, ρ)
(0.1, 0) (0.1, 4/3) (0.5, 0) (0.5, 4/3) (0.9, 0) (0.9, 4/3)
(−0.97, −0.36, −0.30) 0.96 0.94 0.83 0.87 0.34 0.41
(−0.35, −0.23, −0.81) 1.00 1.00 1.00 0.99 0.50 0.44
(0.40, 0.50, 0.69) 1.00 1.00 1.00 1.00 0.69 0.78
(0.61, −0.68, 0.39) 1.00 0.99 0.86 0.91 0.56 0.40
(−0.59, −0.43, 0.78) 1.00 1.00 1.00 1.00 0.83 0.84
(0.26, 0.23, 0.44) 1.00 1.00 0.88 0.87 0.21 0.16
(−0.21, −0.33, −0.46) 1.00 0.99 0.93 0.92 0.19 0.25
(0.35, −0.43, −0.11) 0.76 0.68 0.55 0.51 0.11 0.12
(−0.48, −0.67, −0.90) 1.00 1.00 1.00 1.00 0.89 0.90
(0.51, 0.16, 0.77) 1.00 1.00 0.98 1.00 0.68 0.72
(−0.25, 0.64, 0.66) 1.00 1.00 1.00 0.99 0.67 0.65
(−0.28, 0.25, 0.97) 1.00 1.00 1.00 1.00 0.46 0.38
(0.95, −0.94, 0.81) 1.00 1.00 1.00 1.00 0.90 0.88
(0.89, 0.32, −0.94) 1.00 1.00 1.00 1.00 0.98 0.96
(−0.66, −0.15, −0.25) 0.90 0.92 0.63 0.80 0.26 0.29
(−0.59, 0.36, 0.74) 1.00 1.00 1.00 1.00 0.73 0.84
(0.80, −0.65, 0.83) 1.00 1.00 1.00 1.00 0.89 0.86
(0.64, 0.98, −0.96) 1.00 1.00 1.00 1.00 0.95 0.97
(−0.75, −0.16, −0.25) 0.93 0.97 0.76 0.79 0.39 0.25
(−0.85, −0.48, −0.83) 1.00 1.00 1.00 1.00 0.88 0.90