Global prevalence rates of OA of the hip (upper panel) and knee (lower panel) by age, gender and broad regions. A regions=; AMRO BD= USA Euro BC=European; SEARO= Pakistan; WPRO B= China/Japan; AFRO = African. Adapted from Symmons, D., Mathers, C., and Pfleger, B. (2006). Global burden of osteoarthritis in the year 2000. Geneva: World Health Organization.