As of December 31, 2010, there were 4, 842 health-evidence.ca registered users, with each user identifying an average of 6.3 areas of interest, resulting in a total of 30, 363 identified topic areas. Upon registration, each user is asked to indicate as many areas of interest as they find relevant, which results in more identified areas of interest than total users. For the purpose of accurately representing the data showing all interest, we have included all indications in interest in each topic area, knowing that the denominator used represents total expressions of interest as opposed to total users. The top 10 registered users' topic areas are represented in Figure 1 . Registered users' top three topic areas out of the top 10 include by order of interest: 1) healthy communities, 2) chronic diseases, and 3) nutrition. order of interest include: 1) chronic diseases, 2) physical activity, and 3) addiction/substance use.