Abstract
Background; Osteoarthritis is the most common type of arthritis and one of the chief causes of disability. Aims of the study; is to assess self-efficacy among patients with knee osteoarthritis. Research design; descriptive, research design was utilized to conduct this study on a sample of 240 adult knee osteoarthritis patient of both sex, the study was conducted at Orthopedic outpatient, rheumatoid clinic, and Orthopedic inpatients ward at  Sohag University Hospital. Tool; Tool I: Patient's structure interview It consists of two parts: 1 -Socio-demographic Data 2- Medical History, Tool II: Knee Degeneration Scale Kellgren and Lawrence, Tool III: Knee Injury and Osteoarthritis Outcome Score. Results; the highest percent of studied sample were females, their age ranged from forty to fifty years with mean (43.29±9.99) , majority of patients were married, more than one third of patients were illiterate and  secondary education.  As regards to body mass index more than two fifths of patient were obese, regarding the occupation more than two third of patient were office work. Conclusion; knee osteoarthritis patients exposed to several problem affected their life and improving patients awareness about self-efficacy can favorable affect the incidence of these problem. Recommendations: Organize educational program for meeting patient's information about knee osteoarthritis include causes, risk factor and management of  disease  and make a booklet include heath habits  to protect them self