There are more than 100 different types of arthritis, a disease that affects people of all ages, from babies to older people. Contrary to popular belief, it is not a disease of the elderly; in fact, more than three in five people diagnosed with arthritis are under the age of 65. The disease affects people of all races and both genders, though some people - like women and Aboriginal Canadians - are more likely to get arthritis than others. more... See more text