Osteoarthritis (OA) is a degenerative, disabling and multifactorial disease with a high prevalence that increases exponentially with age. It is divided into categories as primary or secondary Osteoarthritis, depending on the related cause. It mainly affects weight bearing joints such as knees and hips, which are the most frequently affected areas. Knee osteoarthritis is more disabling than any other orthopedic and musculoskeletal disorder.
The impact of osteoarthritis is huge regarding suffering, function loss and use of social-health resources. Also, it worsens well-being and Health-Related Quality of Life (HRQOL) in its physical, emotional and social aspects. Consequently, it is important to know the impact of this condition on HRQOL in order to make therapeutic decisions in the context of health policies related to the efficiency and sustainability of the health system.