http://www.linkedin.com/groups?about=&gid=77616&trk=anet_ug_grppro


greetings jens:

i also suggest submitting this question to the r group on linkedin.com.  we
have almost two thousand members.

regards,

ajit

On Tue, Nov 10, 2009 at 3:00 AM, <r-sig-epi-request@stat.math.ethz.ch>wrote:

> Send R-sig-Epi mailing list submissions to
>        r-sig-epi@stat.math.ethz.ch
>
> To subscribe or unsubscribe via the World Wide Web, visit
>        https://stat.ethz.ch/mailman/listinfo/r-sig-epi
> or, via email, send a message with subject or body 'help' to
>        r-sig-epi-request@stat.math.ethz.ch
>
> You can reach the person managing the list at
>        r-sig-epi-owner@stat.math.ethz.ch
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of R-sig-Epi digest..."
>
> Today's Topics:
>
>   1. The Common risk difference and effect modification on     the
>      additive scale (Jens Levy)
>
>
> ---------- Forwarded message ----------
> From: Jens Levy <jenslevy@gmail.com>
> To: r-sig-epi@stat.math.ethz.ch
> Date: Tue, 10 Nov 2009 11:15:17 +0700
> Subject: [R-sig-Epi] The Common risk difference and effect modification on
> the additive scale
> I am interested in evaluating whether or not the joint effect of two
> independent variables on an outcome are additive. I want to be able to give
> something analogous to the Breslow-Day test of homogeneity, which evaluates
> effect modification on the multiplicative scale, but on the additive scale.
> I would also like to calculate the common Risk Difference across two
> strata.
> Does anyone know of any R package that has these functions, which focus on
> additive relationships in stratified analyses?
>
> Cheers,
>
> Jens
>
>        [[alternative HTML version deleted]]
>
>
>
> _______________________________________________
> R-sig-Epi mailing list
> R-sig-Epi@stat.math.ethz.ch
> https://stat.ethz.ch/mailman/listinfo/r-sig-epi
>
>


-- 
_________________________________
Ajit Gemunu de Silva
Oakland CA 94619

skype: ajit_de_silva

	[[alternative HTML version deleted]]

