title: Factor-analytic study of the Yale Global Tic Severity Scale.
abstract: We report on the factor structure of the Yale Global Tic Severity Scale. Participants were 76 children and adolescents diagnosed with tic disorders. Overall, the model proposed by Leckman et al. [Leckman, J.F., Riddle, M.A., Hardin, M.T., Ort, S.I., Swartz, K.L., Stevenson, J., Cohen, D.J., 1989. The Yale Global Tic Severity Scale: initial testing of a clinician-rated scale of tic severity. Journal of the American Academy of Child and Adolescent Psychiatry 28, 566-573.] represented an adequate fit. The internal consistency of the factors was acceptable and the convergent and divergent validity was supported vis-à-vis correlations with parent ratings of Tourette's Disorder symptoms. These findings support the use of the original scoring structure in assessing pediatric tic severity.
authors.affiliation: Department of Psychiatry, University of Florida, Gainesville, FL 32610, USA. estorch@psychiatry.ufl.edu
authors.forename: Eric A
authors.initials: EA
authors.lastname: Storch
authors.forename: Tanya K
authors.initials: TK
authors.lastname: Murphy
authors.forename: Melanie
authors.initials: M
authors.lastname: Fernandez
authors.forename: Mohan
authors.initials: M
authors.lastname: Krishnan
authors.forename: Gary R
authors.initials: GR
authors.lastname: Geffken
authors.forename: Ashley R
authors.initials: AR
authors.lastname: Kellgren
authors.forename: Wayne K
authors.initials: WK
authors.lastname: Goodman
mesh_terms: D000293:Adolescent; D002648:Child; D005163:Factor Analysis, Statistical; D005260:Female; D006801:Humans; D008297:Male; D012720:Severity of Illness Index; D011795:Surveys and Questionnaires; D005879:Tourette Syndrome / Q000175:diagnosis*