Adelphi Values Patient-Centered Outcomes (PCO) are leaders in research to inform the selection, development, evaluation and implementation of all types of Clinical Outcome Assessments (COAs). This includes Patient-Reported Outcomes (PROs), Clinician-Reported Outcomes (ClinROs), Observer-Reported Outcomes (ObsROs) and Performance Outcomes (PerfOs). Experts in both qualitative research, statistical analysis and mixed methods, we have the skills and experience to determine what matters most to patients, how best to measure those concepts and the most effective and impactful means to communicate this information to other stakeholders.