Health-related quality of life (HRQOL) is an individual’s or group’s self-perception of their physical and mental health over time. HRQOL goes beyond the traditionally diagnosable health outcomes to provide a measure of well-being, it has become an important part of health surveillance. HRQOL is used outside of public health by fields such as psychology, social work, economics, and urban planning. HRQOL is used to determine disease burden, to monitor progress in achieving the Healthy People Goals, to guide policy and legislation, to develop interventions, and to allocate resources where they are most needed.