Patients' Views Concerning Research on Medical Practices: Implications for Consent.

Background: Comparative effectiveness research (CER) and pragmatic clinical trials commonly test interventions that are in routine use and pose minimal incremental risk or burdens to patients who participate in this research. The objective of this study was to elicit the range of patients' views and opinions regarding a variety of different types of research on usual medical practices, especially notification and authorization for them.

Methods: We conducted twelve focus groups with adults in five U.