PHQ-9 scale
Name phq9
Chapter Mental and behavioral disorders/Depression
Patient score on Patient Health Questionnaire (PHQ-9) scale
Data Type Categorical
Data sources GPRD
Dictionaries Read
Repeated Yes
Range (min/max) 0-27
Valid event date range 01/01/1900 - 25/03/2010
Agreed 01.08.2011 (Revision 1)
Category Definition
Apply out of range filter first. A single Read code for PHQ-9 administration

which may be found in either clinical or test files. Actual PHQ-9 results

found in additional file or test file with entity code 372 or entity code 288.
Codelist version
Codelist authors
Creation date
Category (code) Read code Read term CPRD Medcode
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