The Centers For Disease Control & Prevention’s Healthy Days Measures – Population Tracking Of Perceived Physical & Mental Health Over Time

To promote the health and quality of life of United States residents, the U.S. Department of Health and Human Services' Centers for Disease Control and Prevention (CDC) – with 54 state and territorial health agencies – has supported population surveillance of health-related quality of life (HRQOL). HRQOL was defined as "perceived physical and mental health over time . . .