st: Test selection for effects of a number of variables on a dependent variable

[Tim Evans <Tim.Evans@wmciu.nhs.uk>]

Hi all,

I am using Stata 11.2, and have a cohort of patients diagnosed with a particular type of cancer and have a couple of questions to ask of my data. The first relates to the effects of certain variables (social isolation, deprivation, stage at diagnosis etc) on survival time - this I think I have sorted out. However, one question I have to answer is:
 'does ethnicity or social isolation have an effect on stage at diagnosis (controlling for the other factors).'

My stage at diagnosis variable has 6 different values, social isolation has 4 different variables and ethnicity has 5 variables. Originally I thought I would be able to model this using -mlogit-, but this appears to me, to only be appropriate when the dependent variable has 3 different values (and mine has more). I naively tried to use -regress- but the dependent variable cannot be a factor variable and the data I have are not categorised in a continuous manner.

Therefore, does anyone have any suggestions on how I might be able to model the effect of one of my variables (ethnicity or social deprivation) on stage at diagnosis?

Any help gratefully received.

Best wishes

Tim

_DISCLAIMER:
This email and any files transmitted with it are confidential. If you are not the intended recipient, any reading, printing, storage, disclosure, copying or any other action taken in respect of this e-mail is prohibited and may be unlawful. If you are not the intended recipient, please notify the sender immediately by using the reply function and then permanently delete what you have received.
 
The information contained in this e-mail may be subject to public disclosure under the Freedom of Information Act 2000. The confidentiality of this e-mail and your reply cannot be guaranteed, unless the information is legally exempt from disclosure.


*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/faqs/resources/statalist-faq/
*   http://www.ats.ucla.edu/stat/stata/