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. Author manuscript; available in PMC: 2021 Aug 15.
Published in final edited form as: Stat Med. 2020 May 10;39(18):2447–2476. doi: 10.1002/sim.8549

TABLE A5.

Single Confounder Removal: simulation results for λ(−Xj) using nonparametric estimation with n = 2000;

Variable 1 2 3 4 5
Setting 1
Truth −0.149 −0.097 −0.081 −0.084 −0.019
Estimate −0.106 −0.057 −0.050 −0.046 0.004
Bias −0.043 −0.040 −0.030 −0.038 −0.023
ESE 0.015 0.014 0.010 0.009 0.006
Setting 2
Truth −0.145 −0.007 −0.076 −0.007 −0.015
Estimate −0.109 0.007 −0.053 0.007 −0.001
Bias −0.036 −0.013 −0.024 −0.015 −0.014
ESE 0.015 0.003 0.010 0.004 0.004
Setting 3
Truth −0.187 −0.105 −0.015 −0.142 −0.031
Estimate −0.122 −0.052 0.020 −0.080 0.003
Bias −0.065 −0.053 −0.035 −0.062 −0.034
ESE 0.016 0.011 0.010 0.016 0.007
Setting 4
Truth −0.188 −0.134 −0.125 −0.123 −0.062
Estimate −0.105 −0.057 −0.049 −0.045 0.004
Bias −0.084 −0.077 −0.076 −0.078 −0.066
ESE 0.015 0.014 0.010 0.009 0.006

ESE = empirical standard error (standard deviation of estimates across the 1,000 replications)