is there a package in R or functions to calculate odds/hasard ratio from spline regression

Wed, Jun 15, 2016 11:37 AM

Not just difficult, but also generally unwise to attempt interpretation of individual spline coefficients.

Natural splines are third degree, although generally the number of knots is 1 less than the degree of the polynomial.

The predict.* functions will generally handle that difficulty naturally. Each of hte regression functions will have a specific `predict` method for the class of model object. You simply provide the values for the covariates in a dataframe and a prediction for for total of associated terms will be returned. See:

?predict.glm

Std errors are generally available if the proper parameters are offered to the function. This procedure should be exemplified in the help documents and vignettes of the packages with whatever regression function you anticipate using. On the Rhelp mailing list you are requested to present questions with sufficient code to support a coding response.

David


> Thank's again for the answers
> 
> 
> 
> 
> 2016-06-15 17:56 GMT+02:00 David Winsemius <dwinsemius at comcast.net>:
> 
> > On Jun 14, 2016, at 7:43 AM, takiy berrandou <takiyeddine at gmail.com> wrote:
> >
> > Hello,
> >
> > I'm looking for a package or function, which calculate OR/HR from spline
> > model regression. for example in SAS it exist some MACRO helping to do that
> > easiely.
> >
> > i had make some research on the forum here and on the web but without any
> > succes.
> >
> 
> It's not yet clear what  you want to do. Odds ratios are easily calculated from logistic regression models (typically constructed with the glm function the stats package) and hazard ratios are easily calculated from survival models (typically constructed with survreg or coxph in the survival package). All those functions accept spline terms in their formula versions. There are many worked examples that could be found with google searching since google now properly interprets the letter "r" as referring to the computer language. You can get a more focussed search using rseek.com.
> 
> 
> 
> >
> >       [[alternative HTML version deleted]]
> 
> You should read the posting guide. Rhelp is a plain text mailing list.
> 
> >
> > ______________________________________________
> > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
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> 
> David Winsemius
> Alameda, CA, USA
> 
> 
> 
> 
> -- 
> Takiy BERRANDOU
> 0618916037
> takiyeddine at gmail.com
> 

David Winsemius
Alameda, CA, USA

is there a package in R or functions to calculate odds/hasard ratio from spline regression

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