Store and prescription characteristics associated with primary medication nonadherence.

Background: Primary medication nonadherence (PMN) is any instance whereby patients fail to initiate a pharmacotherapy regimen after receiving a prescription for new therapy. The Pharmacy Quality Alliance (PQA) has proposed a standardized definition for PMN and a quality measure to assess the rates of PMN in community pharmacies.

Objectives: To (a) measure PMN using the proposed PQA measure with data available from a pharmacy dispensing system and (b) identify the prescription-level (patient, prescriber, and medication) and store-level (store and neighborhood) characteristics associated with PMN.