Validation of the Diagnostic Algorithms for 5 Chronic Conditions in the Canadian Primary Care Sentinel Surveillance Network (CPCSSN): A Kingston Practice-based Research Network (PBRN) Report

Data flow from physician's office to Canadian Primary Care Sentinel Surveillance Network's (CPCSSN′s) central repository site. At stage 1, the data are entered into the electronic medical record. At this stage, there is a possibility of nondocumentation that can result either from the patient not reporting the condition (or being unaware of it) or physician failure to document the condition in the chart. At stage 2, CPCSSN extracts data from the local sites. At this stage, certain data, including physician notes, hospital and specialist reports, imaging reports, past medical and social history, certain questionnaires (eg, depression screening), procedures, and imaging reports, are not extracted by CPCSSN. These data were only available through the manual chart abstraction. At stage 2 patient identifying information is removed to ensure privacy. At stage 3 cleaned and transformed data is uploaded to the central database.