Re: st: -svy stocx- attained age

[Nick Cox <njcoxstata@gmail.com>]

On 1) we can't help much. This email got through, so it's fine. We
can't see the emails that didn't get through, so we can't examine them
to spot the problem. But I've seen enough cases where people were in
denial about the HTML, ejunk or attachments they were trying to send
to say "Your assumption may not be correct".

You work for samhsa.hhs.gov, whatever that is, and there must be IT
people who can look at your emails and tell you more.

On 2) I can't help much either. I don't know more about Cox models
than you do. But Steve Samuels will likely say something. The usual
guess is sorry, but that model looks complicated.

Nick
njcoxstata@gmail.com


On 31 July 2013 17:53, Muhuri, Pradip (SAMHSA/CBHSQ)
<Pradip.Muhuri@samhsa.hhs.gov> wrote:
> Hello,
>
> I am new to the Statalist. In response to my first posted e-mail to the List, and I got a reply from Steve, with insightful comments and advice.  At this point, I need your help with two issues.
>
> 1) All my subsequent e-mails (content --copied from the Stata log file - in plain text, not html) have bounced back to me. I don't understand what I am doing wrong.
>
> 2) I am using -svy:stcox- models, with attained age as the time scale. I have successfully run several models. However, the addition of a 5-category factor (attained age) to the model gives me the following error message: "flat region resulting in a missing likelihood error occurred when svy executed stcox last estimates not found".  Sorry I am not pasting the content from the log file, fearing that this e-mail will also bounce back.

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