From: Decreasing incidence of inflammatory bowel disease in Eastern Canada: a population database study
IBD | All patients had to have at least one hospitalization, or four physician claims, within a two year period for a diagnosis of IBD. |
• IBD patients were then classified as UC, CD or IBDU as follows. | |
• Each medical contact for the Physician Billing claims database was scored as + 1 (UC) or -1 (CD). | |
• Each medical contact for the Discharge Abstract database was scored as +2 (UC) or -2 (CD). | |
• A cumulative score was calculated for each patient. | |
UC | Patients with a cumulative score greater than +2. |
CD | Patients with a cumulative score less than -2. |
IBDU | Patients with a cumulative score equal to, or between, -2 and +2. |