Year of birth
Name birthyear
Chapter Demographics/Age
Year of birth as defined in GPRD variable yob.
Data Type Continuous
Data sources GPRD
Dictionaries Read
Repeated No
Valid event date range 01/01/1900 - 25/03/2010
Agreed 02/03/2011 (Revision 1)
Data extracted verbatim from GPRD patient table.
Codelist version
Codelist authors
Creation date
Category (code) Read code Read term CPRD Medcode
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