PHAR investigators used nine health-related quality of life (HRQoL) measures to study how HRQoL varies by body mass index category among gender and racial subgroups. The research found that a lower HRQoL score was associated with being obese or overweight rather than with having a normal body mass index. The associations were driven primarily by physical health. The degree of the associations varied by the index used. PHAR, LLC investigators collaborated with the RAND Corporation, University of Wisconsin-Madison School of Medicine and Public Health, UCLA School of Public Health, Kaiser Permanente Northwest Region, and Health Utilities Inc. For more detailed results, visit the Quality of Life Research website.