Validation of the Adherence Barriers Questionnaire – an instrument for identifying potential risk factors associated with medication-related non-adherence

Medication non-adherence is a major challenge in the real-life treatment of chronically ill patients. To meet this challenge, adherence interventions with a tailored approach towards patient-specific adherence barriers identified with a reliable and practicable questionnaire are needed. This investigation aimed to develop and validate such a questionnaire, the “Adherence Barriers Questionnaire (ABQ)”.