CRPS occurs most frequently in people of European ancestry (in about 66 to 80 percent of cases). In a study done in the United States, it was found that CRPS type I developed in 5.46 persons out of every 100,000 per year. It is estimated that CRPS affects nearly 200,000 patients annually in the United States.
The prevalence between 2001 and 2013 of adult US Americans with health insurance (48·67 million) was 25·4–98·7 per 100000 people, depending on search criteria, with a small increase in the male to female ratio of 1·05 (75·2 men vs 71·8 women per 100000 people), peaking in patients aged 46–55 years.16 The incidence is estimated to be four to five new cases per 100000 per year, thus confirming data from a comprehensive population-based study from Minnesota.
Affects 1 in 6,000 newborns in the United States. Approximately 40,000 to 80,000 people in the United States have tuberous sclerosis. The prevalence in Europe is estimated to be approximately 1 in 25,000 to 1 in 11,300. As many as 2 million people worldwide are believed to have the disorder.
The prevalence of polycythemia vera varies worldwide. The condition affects an estimated 44 to 57 per 100,000 individuals in the United States. For unknown reasons, men develop polycythemia vera more frequently than women.