Prevalence,Natural History,Prognosis Factor,QualityofLife,Health Care Consumption and Social Consequences of Symptomatic Knee and Hip Osteoarthritis in France

Inclusion Criteria: * male and female aged between 40 and 75 years * symptomatic hip or knee, uni or bilateral OA with clinical diagnosis confirmed by a medical physician and satisfying ACR classification criteria * Representative of prevalent cases in France at the cohort set-up time Exclusion Criteria: * presence of hip or knee joint replacement surgery * comorbidities severe enough to affect quality of life significantly or likely to induce a high health care consumption independently of OA * an history of osteotomy * Patello-femoral osteoarthritis without tibio-femoral osteoarthritis * Other joint diseases of the target joints * adult under legal protection or not able to consent