 Multiple studies published since 2000 have consistently demonstrated that the prevalence of TS and tic disorders is much higher than previously thought.Fernandez, State and Pittenger wrote in 2018 that the rate of Tourette's in the general population is between 0.5 and 0.7%, and Robertson (2011) suggested 1%.A prevalence range of 0.1% to 1% yields an estimate of 53,000 to 530,000 school-age children with Tourette's in the United States, using 2000 census data.