About 5% of children stutter for 6 months or more.1Stuttering most commonly begins around age 5 but generally
occurs any time between ages 2 and 7.2 About 75 out of
100 children who stutter get better without treatment.1 Boys are more likely than girls to keep stuttering.1
Those with persistent speech problems have
developmental stuttering. Approximately 1% of adolescents are affected by
developmental stuttering.3 This figure drops to
approximately 0.8% by adulthood.2
It is possible that the main title of the report Tyrosine Hydroxylase Deficiency is not the name you expected. Please check the synonyms listing to find the alternate name(s) and disorder subdivision(s) covered by this report.
Guitar B, Conture EG (2007). The Child Who Stutters: To the Pediatrician, revised 4th ed. (Publication No. 23).
Memphis: Stuttering Foundation of America. Also available online:
American Psychiatric Association (2000). Stuttering. In Diagnostic and Statistical Manual of Mental Disorders, 4th ed., text rev., pp. 67-69. Washington, DC: American Psychiatric Association.
Ursano AM, et al. (2008). Communication disorders
section of Disorders usually first diagnosed in infancy, childhood, or
adolescence. In RE Hales et al., eds., American Psychiatric Publishing Textbook of Psychiatry, 5th ed., pp. 874-877. Washington, DC:
American Psychiatric Publishing.
Primary Medical Reviewer
Susan C. Kim, MD - Pediatrics
Specialist Medical Reviewer
Robert M. Kroll, BsC, MSc, PhD - Speech Pathology
August 13, 2010
WebMD Medical Reference from Healthwise
August 13, 2010
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