QUEBEC CITY, - Although it has been described as an invisible disease, the impact of arthritis on the Canadian economy can't be ignored. A new report from the Arthritis Alliance of Canada (AAC) estimates that osteoarthritis (OA) - the most prevalent form of the disease - and rheumatoid arthritis (RA) costs the Canadian economy $33 billion through (direct) healthcare expenses and (indirect) lost productivity and taxes. The Impact of Arthritis in Canada: Today and Over the Next 30 Years provides a detailed look at the impact of arthritis and offers solutions on how to mitigate and manage the situation.