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Given a list of patient demographic characteristics and the patient lab records in RDBMS tables separated by years, one can create a list of summary variables per specification per person almost automatically using 3 parallel processes: process #1 selects all lab records only for the patients in the ID list and writes them into pipe #1; process #2 reads records from pipe #1, cleans lab results into appropriate numeric values and writes them into pipe #2; process #3 reads lab values from pipe #2 and aggregates them into person-level characteristics. Tricks of SAS/Access for OLEDB, regular expression, Hash object, and macro programming are illustrated too. The paper also discusses the advantages and limitations of the methods.

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Format:PDFSize:178 KB
Date:Feb 2009
Pages:10

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