Today there are 896 members of the Orthostatictremor.org forum, and many have submitted their location (general location only, such as - county or state or country). With that information this map was created. There are overlapping locations and as a result the map doesn’t fully illustrate the number of people within an area. But it does give us an interesting snapshot of the OT world.
There are many factors as to why there might be a higher representation of people in certain areas of the world. Language, access to the internet, economic, and more subtle factors such as whether certain cultures are more accustomed to communicating in social media.
Updated Map 03/13/14 corrections