Which column is used to generate a count of patients in SlicerDicer?

The correct choice for generating a count of patients in SlicerDicer is the DurableKey from the PatientDim table. The DurableKey serves as a unique identifier for patients, which allows for accurate aggregation and count calculations without duplicating patient records. This aspect is critical when analyzing patient data to ensure that each individual is counted once, even if they have multiple entries in the database due to various interactions with the healthcare system.

Other options do not serve the purpose of counting distinct patients effectively. For example, PatientKey could potentially be used, but it may not guarantee the same level of uniqueness due to the way patient records can be managed. MedicationOrderEpicId is related to specific medication orders and does not pertain directly to patient counts, making it irrelevant in this context. Finally, DisplayString in DateDim pertains to dates, which is not suited for counting patients. Hence, the DurableKey is the most appropriate choice for the task of counting patients in SlicerDicer.