\cite{Howlett2022} investigated the prognosis of functional tic-like behaviors in 20 adolescents and 9 adults. Overall, the authors have shown in this prospective study that adolescents have a better prognosis than adults with this diagnosis. As the most effective therapeutic approach treatment of comorbidities with SSRI and CBT was proposed. 

Epidemiology

Several studies have addressed the prevalence and incidence of Tourette syndrome and chronic tic disorders.  A systematic review and meta-analysis showed a global prevalence of TS of 0.5-0.6% and of 0.7% in the population of children and adolescents \cite{Jafari2022}.\citet{Tinker2022}, from the CDC, estimates that "350,000–450,000 U.S. children and adults have Tourette syndrome," while about a million have other chronic tic disorders.
In Asia, the National Taiwan Insurance Research Database was used to estimate incidence and prevalence of TS and chronic tic disorders from 2007-2015 \cite{Chou2022}. An increase in annual incidence rates was seen during this period in childhood and adolescence, and a decrease in adulthood. Furthermore, an increase in prevalence of TS and chronic tic disorders was seen. 
In China, prevalence of tic disorders in school students between 6 and 16 years was shown to be 1.37% \cite{Yan2022}. There was seen a high comorbidity between TS and OCD.
Using 2016-2017 National Survey of Children´s Health data on children and adolescents between 6 and 17 years, parents reported that 0.3% of the children ever had been diagnosed with TS \cite{Charania2022}.