[R] Type III tests and Cox models

2014-01-20 Thread Terry Therneau
Someone asked a question about this on the list a couple months ago. I replied that I didn't know any sound basis for it, and the counter-reply was SAS has it. Grant applications were due and I got testy, so there was no further progress at that point. As the author of the survival package I

Re: [R] Type III tests and Cox models

2014-01-20 Thread peter dalgaard
On 20 Jan 2014, at 18:47 , Terry Therneau thern...@mayo.edu wrote: The short summary: I was suspicious before, now I know for certain that it is misguided, and the phreg implementation of the idea is worse. A fortune candidate, if ever I saw one. -pd -- Peter Dalgaard, Professor, Center

Re: [R] Type III tests and Cox models

2014-01-20 Thread Hadley Wickham
To save others a little hunting, you can read the vignette online at http://cran.r-project.org/web/packages/survival/vignettes/tests.pdf Hadley On Mon, Jan 20, 2014 at 11:47 AM, Terry Therneau thern...@mayo.edu wrote: Someone asked a question about this on the list a couple months ago. I

Re: [R] Type III tests and Cox models

2014-01-20 Thread Göran Broström
On 01/20/2014 07:02 PM, peter dalgaard wrote: On 20 Jan 2014, at 18:47 , Terry Therneau thern...@mayo.edu wrote: The short summary: I was suspicious before, now I know for certain that it is misguided, and the phreg implementation of the idea is worse. A fortune candidate, if ever I saw

Re: [R] Type III tests and Cox models

2014-01-20 Thread peter dalgaard
On 20 Jan 2014, at 23:05 , Göran Broström goran.brost...@umu.se wrote: On 01/20/2014 07:02 PM, peter dalgaard wrote: On 20 Jan 2014, at 18:47 , Terry Therneau thern...@mayo.edu wrote: The short summary: I was suspicious before, now I know for certain that it is misguided, and the phreg

Re: [R] Type III tests and Cox models

2014-01-20 Thread Terry Therneau
This last brought forth a good chuckle. Perhaps combine them into a single entry? On a serious note, to have someone of significant experience say that they hadn't heard of SAS's method for doing x, for nearly any x, marks a welcome climate change. (And took nearly that long.) The phreg