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. Author manuscript; available in PMC: 2011 Feb 24.
Published in final edited form as: Stat Med. 2008 Dec 20;27(29):6158–6174. doi: 10.1002/sim.3434

Table 6.

Percentage of covariates selected and average false positives out of the 500 null replicates

Covariate 95% CI Backward Forward Stepwise SSVS

p=0.01 p=0.05 p=0.20 p=0.01 p=0.05 p=0.20 p=0.01 p=0.05 p=0.20 w=0.25 w=0.4 w=0.5 w=0.6
Smoking 6.2 1.0 7.2 7.8 0.2 4.0 8.8 0.2 4.0 8.8 0.8 2.8 4.6 8.0
Alcohol 5.6 1.2 6.4 8.6 0.6 2.8 7.2 0.6 2.4 7.4 0.4 1.8 3.2 6.6
XPD 5.8 1.6 8.4 7.0 0.2 3.8 7.2 0.4 3.8 7.2 1.0 2.4 3.0 5.2
Fiber 4.4 2.0 8.2 9.6 0.2 2.8 7.0 0.4 2.8 7.0 0 0 0 0
Folate 5.4 2.2 7.4 8.8 0.8 2.6 5.8 0.8 2.6 6.0 0.4 0.4 0.4 1.0
MTHFR 6.0 1.2 7.4 7.6 0.8 4.4 8.4 0.8 4.4 8.4 0.4 2.0 2.6 2.0
X6 4.4 2.6 9.8 9.6 0.2 1.4 4.2 0.2 1.2 4.6 0 0 3.2 5.0
X7 4.4 1.4 6.6 5.0 1.0 4.8 6.2 1.0 4.8 6.2 0 0 0 0
X10 5.0 1.8 6.2 6.4 0.6 4.4 7.2 0.6 4.4 7.0 1.2 2.2 0 0
X11 4.4 2.6 9.8 12.2 0.4 1.4 7.6 0.4 1.4 5.6 0 0 3.2 4.6
X12 7.8 3.2 12.4 14.8 0.2 1.6 7.2 0.2 1.4 7.2 0 0 0 0
X13 5.2 1.8 8.4 13.2 0 1.6 8.0 0 1.6 8.2 0 0 0 0
X14 4.6 3.2 1.0 10.4 0.4 3.0 7.2 0.4 2.8 7.2 0 0 0 0
Avg. False Positives 5.3 2.0 7.6 9.3 0.4 3.0 7.1 0.5 2.9 7.0 0.3 0.9 1.6 2.5
Max. False Positives 7.8 3.2 12.4 14.8 1.0 4.8 8.8 1 4.8 8.8 1.2 2.8 4.6 8.0