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ERIC Number: ED505587
Record Type: Non-Journal
Publication Date: 2009-Jun-5
Pages: 7
Abstractor: ERIC
Reference Count: 10
ISSN: ISSN-0149-2195
Prevalence of Diagnosed Tourette Syndrome in Persons Aged 6-17 Years--United States, 2007
Centers for Disease Control and Prevention, MMWR v58 n21 p581-585 Jun 2009
Tourette syndrome (TS) is an inheritable, childhood-onset neurologic disorder marked by persistent multiple motor tics and at least one vocal tic. Tics are involuntary, repetitive, stereotypic movements or vocalizations that are usually sudden and rapid and often can be suppressed for short periods. The prevalence of TS is uncertain; the broad range of worldwide estimates, from 1-30 per 1,000 population, likely is the result of differences in study methodology. This report presents the first estimate of national prevalence of diagnosed TS among a national sample of U.S. children and adolescents aged 6-17 years. Based on data from the 2007 National Survey of Children's Health (NSCH), the estimated prevalence of a lifetime diagnosis of TS by parent report was 3.0 per 1,000. A diagnosis of TS was almost three times as likely for boys as girls, twice as likely for persons aged 12-17 years than for those aged 6-11 years, and twice as likely for non-Hispanic white persons than for Hispanic and non-Hispanic black persons. Among persons ever diagnosed with TS, 79 percent also had been diagnosed with at least one co-occurring mental health or neuro-developmental condition. Telephone interviews (N = 91,642) were completed with parents (or guardians) from April 2007 through July 2008. One child was randomly selected from each household to be the focus of the interview. Complete data on TS were available for 64,034 persons aged 6-17 years. The overall response rate was 46.7 percent; the cooperation rate was 66.0 percent. Data were weighted to account for unequal probability of selection of each household and child, for non-response, and for households without landline telephones. Weights were adjusted further so that estimates reflected the demographic distribution of non-institutionalized U.S. children and adolescents from the 2007 American Community Survey of the U.S. Census Bureau. Parents were asked, "Has a doctor or other health-care provider ever told you that your child had Tourette syndrome?" Affirmative responses were followed by asking whether the child currently has TS, and if so, whether the parent would describe the child's TS as mild, moderate, or severe. The same series of questions were asked about other co-occurring conditions, including attention-deficit/hyperactivity disorder (ADHD), depression, anxiety problems, behavioral or conduct problems such as oppositional defiant disorder or conduct disorder, and developmental delays affecting a child's ability to learn. Prevalence of parent-reported TS diagnosis among U.S. children, presence of co-occurring conditions, and severity of symptoms among children with current TS were calculated using statistical analysis software to account for the complex sampling design of NSCH. (Contains 1 figure and 1 table.) [This report is based, in part, on contributions from Maternal Child Health Bur, Health Resources and Svcs Admin, US Dept of Health and Human Svcs.
Centers for Disease Control and Prevention. 1600 Clifton Road, Atlanta, GA 30333. Tel: 800-311-3435; Tel: 404-639-3311; Web site:
Publication Type: Journal Articles; Reports - Research
Education Level: Secondary Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: Centers for Disease Control and Prevention (DHHS/PHS)
Identifiers - Location: United States