<prompt> Answer this question truthfullyWhat are the epidemiological and demographic characteristics of septic arthritis?  <response>: <reason> Worldwide, the incidence of septic arthritis ranges from a low of 2 per 100,000 persons year to a high of 10 per 100,000 persons year Worldwide, the Incidence of septic arthritis in patients with history of rheumatoid arthritis and patients with joint prostheses ranges from a low of 30 per 100,000 persons year to a high of 70 per 100,000 persons year. Worldwide, the Incidence of septic arthritis in patients with joint prostheses ranges from a low of 40 per 100,000 persons year to a high of 68 per 100,000 persons year.The case-fatality rate of septic arthritis is estimated to be 10-25. Even after survival from septic arthritis, 25-50 of the patients suffer from irreversible loss of joint function. 