search for: ipcw

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2012 Jul 23
1
mboost vs gbm
I'm attempting to fit boosted regression trees to a censored response using IPCW weighting. I've implemented this through two libraries, mboost and gbm, which I believe should yield models that would perform comparably. This, however, is not the case - mboost performs much better. This seems odd. This issue is meaningful since the output of this regression needs to be i...
2003 Dec 21
0
Software/algorithms for competing risks analysis
...ming the following types of competing risks analyses: (1) cumulative (crude) incidence regression (2) Gray's K-sample log-rank test for cmulative incidence (3) multi-state models (4) dependent competing risks modeling with (a) copulas, (b) Robin's Inverse probability of censoring weighted (IPCW) estimator, (c) frailty I would really appreciate any pointers/references to algorithms/software in other environments such as SAS/STATA/SPSS, as well as in R. Thanks very much, Ravi.