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st: How to sort out missing data

From   "Ziad El-Khatib" <>
Subject   st: How to sort out missing data
Date   Tue, 20 Nov 2007 05:39:21 -0800

Dear STATA lister
I have cohort patients following on visit: 0,2,4,8,12,16,20,24,36&52

When I tab the dataset i see that the total number of patients per
visit is not consistent.

Is it possible to sort out the studyid number of patients who did not
come on every visit?
if yes, would it be possible to find at which visit number?

Thank you in advance and best regards
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