Displaying 3 results from an estimated 3 matches for "clinicalscore".
2011 Apr 30
0
bootcov or robcov for odds ratio?
...del.robcov <- robcov(MyModel)
> anova(MyModel)
Wald Statistics Response: outcome
Factor Chi-Square d.f. P
stenosis 0.20 1 0.6547
x1 10.69 1 0.0011
x2 2.33 1 0.1270
procedure 3.27 1 0.0708
ClinicalScore 2.55 1 0.1102
TOTAL 18.71 5 0.0022
> anova(MyModel.boot)
Wald Statistics Response: outcome
Factor Chi-Square d.f. P
stenosis 0.16 1 0.6921
x1 17.90 1 <.0001
x2 3.36 1 0.0669
p...
2011 May 15
5
Question on approximations of full logistic regression model
...by step-down technique predicting L from all of the
componet variables using ordinary least squares (ols in rms package) as
the followings. I would like to know whether I am doing right or not.
> library(rms)
> plogit <- predict(full.model)
> full.ols <- ols(plogit ~ stenosis+x1+x2+ClinicalScore+procedure, sigma=1)
> fastbw(full.ols, aics=1e10)
Deleted Chi-Sq d.f. P Residual d.f. P AIC R2
stenosis 1.41 1 0.2354 1.41 1 0.2354 -0.59 0.991
x2 16.78 1 0.0000 18.19 2 0.0001 14.19 0.882
procedure 26.12 1 0.0000 44.31 3...
2011 May 03
0
Bootstrapping confidence intervals
...80 10.0 0.90 NA 0.56 1.45
x1 1.5 2 0.5 1.21 0.37 0.49 1.94
Odds Ratio 1.5 2 0.5 3.36 NA 1.63 6.95
x2 1.5 2 0.5 -0.29 0.19 -0.65 0.08
Odds Ratio 1.5 2 0.5 0.75 NA 0.52 1.08
ClinicalScore 3.0 5 2.0 0.61 0.38 -0.14 1.36
Odds Ratio 3.0 5 2.0 1.84 NA 0.87 3.89
procedure - CA:CE 2.0 1 NA 0.83 0.46 -0.07 1.72
Odds Ratio 2.0 1 NA 2.28 NA 0.93 5.59
> summary(MyModel.boot, stenosis=c(70, 80), x1=c(1...