Outcomes research examines the end results of healthcare provided to patients and uses this information to provide scientific evidence to help clinicians and patients make informed healthcare decisions. It aims to include subjective patient-reported outcomes like quality of life that were previously excluded from traditional clinical research. Two key organizations that conduct outcomes research are the Patient-Centered Outcomes Research Institute (PCORI), which funds research to help patients make healthcare choices based on desired outcomes, and the Agency for Healthcare Research and Quality (AHRQ), which develops knowledge and measures to improve patient safety and healthcare quality. While outcomes research provides important patient-centered data, limitations include potential reluctance to share private information and variability in how patients perceive symptoms and treatment impact.