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When the practice staff presses the ‘Collect’ Button in CAT4, to create a report, two files are produced. The two files produced by CAT4 are encrypted to ensure the data can only be viewed within CAT. A de-identified data file can be created within CAT4 using the ‘de-identify dataset’ tool. This is the only data file that can be exported and taken off-site either by

  • using the CAT4 'Send To' function (recommended) - full details are here: Sending data

This is recommended as it:


Patients who have withdrawn their consent to share data can be flagged in CAT. This will remove them from the de-identified data file. For details see here: Patient Consent Withdrawn - Opt Out