What is the global prevalence of Tourette syndrome (TS) and other tic disorders?

Updated: May 30, 2019
  • Author: William C Robertson, Jr, MD; Chief Editor: Stephen L Nelson, Jr, MD, PhD, FAACPDM, FAAN, FAAP  more...
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Answer

A recent epidemiological review suggests a 1% international prevalence of TS. [131] However, prevalence figures for TS have varied between 0.4% and 3.8%; in addition, different figures have been reported for some parts of the world and races, with a lower rate in sub-Saharan black Africans.

Several possible reasons for variations in reported rates have been suggested. These include the lack of a definitive diagnosis of TS; the variable manifestations of the syndrome; the methods employed in different epidemiological studies; different cultural propensities of people with tics to seek medical care; and possibly genetic and allelic differences in different races. [132]


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