EuroQol is a standardized instrument used to measure health-related quality of life. It provides a simple way to assess how individuals perceive their health status and the impact of diseases or treatments on their daily lives. The most common version is the EQ-5D, which includes five dimensions: mobility, self-care, usual activities, pain/discomfort, and anxiety/depression. The EuroQol framework allows for comparisons across different populations and conditions, making it valuable for health economics and policy-making. It helps researchers and healthcare providers understand the effectiveness of interventions and allocate resources more efficiently.