%0 Journal Article %T Physical function assessment tools in pediatric rheumatology %A Lakshmi Moorthy %A Margaret GE Peterson %A Melanie J Harrison %A Karen B Onel %A Thomas JA Lehman %J Pediatric Rheumatology %D 2008 %I BioMed Central %R 10.1186/1546-0096-6-9 %X Pediatric rheumatic diseases causing arthritis, fatigue, muscle weakness and blindness are associated with significant functional impairment. For several children with rheumatic illness, physical functional ability is often the chief determinant of their well-being. Quality of life (QOL), health-related QOL (HRQOL), physical function and health status scales are all used as outcome measures in children with significant musculoskeletal involvement, and account for varying degrees of patient-perceived state of physical ability/and or impact of physical disability on overall well being.The World Health Organization QOL group defined QOL as "individuals' perceptions of their position in life in the context of the culture and value systems in which they live and in relation to their goals, expectations, standards and concerns. It is a broad ranging concept affected in a complex way by the person's physical health, psychological state, level of independence, social relationships, and their relationships to salient features of their environment" [1]. Calman et al has presented a "goal-oriented" model where QOL measures the difference between a person's expectations and current position at a certain time[2]. Recent scientific advances have increased life span, often at the expense of increased medication use and commensurate drug-related complications, more frequent medical visits and evaluation, all of which can lead to significant emotional and lifestyle changes. QOL emerges as a critical issue in this regard and becomes a primary consideration for the improvement in modern medicine.Specifically for patients with chronic diseases, health primarily impacts the overall QOL. HRQOL is defined as "optimum levels of mental, physical, role and social functioning, including relationships, and perceptions of health, fitness, life satisfaction and well-being" [3]. Implicit in HRQOL is the "assessment of patient's satisfaction with treatment, outcome and health status and with futur %U http://www.ped-rheum.com/content/6/1/9