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st: Select a particular test
From
"Peci, Adriana (OAHPP)" <[email protected]>
To
<[email protected]>
Subject
st: Select a particular test
Date
Thu, 23 Feb 2012 17:57:05 -0500
Dear Stata list,
I have a long form database in which each patient identified by pat_id
have up to four tests performed.
The test names are:IFA, DFA, CULT, BIN.
I want to select/know how many patients had IFA but not DFA, CULT, or
BIN.
Here is an improvise of my data:
Pat_id Test
1 IFA
1 DFA
1 CULT
1 BIN
2 BIN
2 IFA
2 DFA
3 IFA
4 DFA
4 CULT
4 CULT
Could someone help me with that ?
Thank you so much,
Adriana
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