Statalist


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: st: Interpretation of regressionmodel of ln-transformed variable


From   "roland andersson" <[email protected]>
To   [email protected]
Subject   Re: st: Interpretation of regressionmodel of ln-transformed variable
Date   Thu, 6 Nov 2008 23:56:17 +0100

Yes it converged with family(gamma) and after I had removed some
covariates. Can someone tell med what an analysis with family(gamma)
link(power -1) means?

I think this gets too complicated and the difference in LOS is so
small that it has no importance. I will content with stating there was
no difference in median LOS and use Mann-Whitney test and skip the
modelling of the LOS.

Thanks for all your input

Roland


2008/11/6 Nick Cox <[email protected]>:
> Sometimes a gamma family works well for reciprocal links.
>
> Nick
> [email protected]
>
> roland andersson
>
> Thank you Peter
>
> I tried that but unfortunately the model did not converge.
>
> 2008/11/6 Lachenbruch, Peter <[email protected]>:
>
>> You need a space between power and -1
>> Check the help for glm
>
> Roland andersson
>
>> I tried the model
>>
>> xi: glm lengthof stay lapscopy i.appdgn2 i.alderk prepermalign
>> precardioscleros  preperdiabetes cons, eform link(power-1) nocons
>> and get an error message "unrecognized command:  power"
>>
>
> *
> *   For searches and help try:
> *   http://www.stata.com/help.cgi?search
> *   http://www.stata.com/support/statalist/faq
> *   http://www.ats.ucla.edu/stat/stata/
>
*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/



© Copyright 1996–2024 StataCorp LLC   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index