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For example if you have a patient who visited 3 clinics who all uploaded their data to PAT CAT and only one of the three clinics has a diagnosis of diabetes on file, PAT CAT will use the patient record with the most recent visit date. PAT CAT will then go through all reported indicators and check if there are results missing from the most recent record. Anything missing from the original record will be completed using data from the other visits of the patient. If there is more than one result available, the most recent one is used.
This creates a single virtual patient with all available and most up to date information from all clinics visited in the current reporting period.

 When used for the whole catchment (no Practice filters) this will normally show a lower number in the adjusted column as duplicates are removed. Based on current numbers this can be between 10 and 25% less patients as visiting more than one practice is very common.

Even when looking at all practices the numbers in the adjusted column can, under certain circumstances, be higher than the total. Consider this example:

  1. Filter for active patients with Asthma.
  2. A patient has visited multiple practices
  3. One practice has a diagnosis of Asthma recorded, the other doesn't - this means the virtual patient in the adjusted column has a diagnosis of Asthma
  4. The patient is an active patient (3 or more visits to one practice) - this means the virtual patient in the adjusted column is an active patient
  5. Now when you apply a filter for active patients with Asthma there will be none in the total but one patient in the virtual column

This is not always the case and depends on overall patient characteristics and data uploaded, but it is a scenario to consider when using the adjusted column.


However when you use a filter for one practice (or a group of selected practices) the adjusted column can show higher numbers as in the example below. The filters applied were for one practice and for patients with diabetes only. As you can see from the total there are 819 patients at the clinic but 1061 in the adjusted column.

 

However there There are other patients who have visited other practices, when they visited the other practices they were diagnosed as diabetics in the other practice. There was a “virtual patient” created in the PHN PAT CAT, that tracks the patient.
According to PAT CAT this practice actually has 1,061 patients with diabetes. So there are 242 patients with diabetes in the practice, that has have been diagnosed at other practices.

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