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st: A question on using survival model

From   "Chunling Lu" <>
To   <>
Subject   st: A question on using survival model
Date   Thu, 24 May 2007 12:25:55 -0400

Dear all,

I have a question "When was the last time you visited doctor" with the
following categories: (1) in the last 30 days, (2) between 1 month and less
than 1 year ago. I now would like to derived the average number of visits
for last 30 days. How should I model it and how can I do it in stata?

Any suggestions are highly appreciated. 


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