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Reliability and validity of the Yale Global Tic Severity Scale.

2005; American Psychological Association; Volume: 17; Issue: 4 Linguagem: Inglês

10.1037/1040-3590.17.4.486

1939-134X

Eric A. Storch, Tanya K. Murphy, Gary R. Geffken, Muhammad Sajid, Pam Allen, Jonathan W. Roberti, Wayne K. Goodman,

Autism Spectrum Disorder Research

To investigate the reliability and validity of the Yale Global Tic Severity Scale (YGTSS), 28 youth aged 6 to 17 years with Tourette's syndrome (TS) participated in the study. Data included clinician reports of tics and obsessive-compulsive disorder (OCD) severity, parent reports of tics, internalizing and externalizing problems, and child reports of depression and anxiety. All children participated in a 2nd YGTSS administration by the same rater 48 days later. Good internal consistency and stability were found for the YGTSS scores. YGTSS scores demonstrated strong correlations with parent-rated tic severity (r = .58-.68). YGTSS scores were not significantly related to measures of clinician ratings of OCD severity (r = .01-.15), parent ratings of externalizing and internalizing behavior (r = -.07-.20), and child ratings of depression (r = .02-.26) and anxiety (r = -.06 -.28). Findings suggest that the YGTSS is a reliable and valid instrument for the assessment of pediatric TS.