<prompt> Answer this question truthfullyWhat are the epidemiological and demographic characteristics of Achalasia?  <response>: <reason> Achalasia is a rare disease, with an incidence of 1 case per 100,000 per year in adults and a prevalence of 8-10 cases per 100,000. Most commonly, achalasia is diagnosed between 25 and 60 years old, mean age of diagnosis being 50 years. Achalasia has no predilection to any age. Achalasia has the same prevalence in both whites and non-whites. 