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st: How to identify multiple substrings within a string


From   "Michelle T. Butler" <[email protected]>
To   "[email protected]" <[email protected]>
Subject   st: How to identify multiple substrings within a string
Date   Mon, 14 Jan 2013 10:37:46 +1100

Hi all, I am searching a string variable for cases who don't have diarrhoea.I need to identify records where the terms nil, no or denies preceeds the term diarrhoea in the same sentence.I have already identified that these terms do not always immediately preceed diarrhoea eg. No vomiting/diarrhoea, so I am looking for a way to extract all observations where nil, no, denies occurs in close proximity to diarrhoea, ignoring spelling errors/upper/lower case variations etc.Thank you for your help,Tove Fitzgerald.



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