There are three main types of outcomes research: care-related research which measures the effects of nursing interventions; patient-related research which focuses on patient behaviors and actions; and performance-related research which examines how nurses perform their jobs. The document also outlines two key organizations involved in outcomes research - the Patient-Centered Outcomes Research Institute which was established by the Affordable Care Act to help patients make informed healthcare decisions, and the Agency for Healthcare Research and Quality, a federal agency charged with improving healthcare safety and quality in the US. While outcomes research can improve patient outcomes and quality of care, it also faces criticisms such as unnecessary duplication of studies and denying patients proven treatments.