What is an Episode of Care and how is this different from a presentation?

An episode of care is a patient who is treated within the emergency department during the relevant time period regardless of their arrival date. A presentation is a patient who arrived during the relevant time period.

Episodes of care will always be equal to or greater than the number of presentations, the difference will be the number of people in the emergency department at the start of the day. 

To calculate episodes of care during 24 hours it is number of people who were in the department at midnight plus the number of presentations during that day.