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re: st: Dose-response analysis

From   "Airey, David C" <>
To   "<>" <>
Subject   re: st: Dose-response analysis
Date   Mon, 2 Dec 2013 19:06:53 +0000


I don't see how anyone can answer this question 
without more information, sorry.

To me it sounds like you need to posit a mean function 
for your dose response and some amount of error about 
that mean function before you can begin to answer your 

> Dear All, 
> I am looking at data from a pilot study which aims to assess whether  patients who receive intervention have lower depression scores at follow-up compared to those in the control condition.  I can use a cut-off value to identify those participants who had improved scores at follow-up from those who did not so that I can create a binary variable which codes 'improvers' vs. 'non-improvers'. What I would like to do next is establish what is the minimum number of sessions that patients need to attend to fall under the 'improver' category (dose-response?). 
> Can anyone recommend a Stata command that allows me to do so? 
> Thanks,
> Francesca

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