After the age of 65, the chance of developing the disease double every five years. The Mayo Clinic reported that almost fifty percent of those people who are 85 years or older are affected.<ref name="mayo">[http://www.mayoclinic.com/health/alzheimers-disease/DS00161/DSECTION=risk-factors Alzheimer's disease: risk factors] mayoclinic.com, retrieved September 11, 2011</ref> | After the age of 65, the chance of developing the disease double every five years. The Mayo Clinic reported that almost fifty percent of those people who are 85 years or older are affected.<ref name="mayo">[http://www.mayoclinic.com/health/alzheimers-disease/DS00161/DSECTION=risk-factors Alzheimer's disease: risk factors] mayoclinic.com, retrieved September 11, 2011</ref> |