Proportion of Days Covered (PDC) measures assess the percentage of patients covered by prescription claims for the same drug or for another drug in the same therapeutic class, within a calendar range. The PDC threshold is the level above which the medication has a reasonable likelihood of achieving the most clinical benefit; clinical evidence provides support for a standard PDC threshold of 80%. The following therapeutic categories are covered by the PDC measures hosted within the EQUIPP platform:
- Non-insulin Diabetes Medications (including biguanides, sulfonylureas, DPP-IV inhibitors, TZDs, incretin mimetics, meglitinides, and SGLT2 Inhibitors)
- Renin Angiotensin System (RAS) Antagonists (including ACE inhibitors, ARBs, and direct renin inhibitors)
Patient Attribution: For the PDC measures, the pharmacy who filled the most prescription claims within the target therapeutic category for a specific patient within the calendar range will be assigned responsibility for the patient. All prescription drug claims, regardless of dispensing pharmacy, will be counted towards the patient's PDC threshold.