TY - JOUR
T1 - Prevalence of tics in schoolchildren in central Spain
T2 - A population-based study
AU - Cubo, Esther
AU - Trejo Gabriel Y Galán, José María
AU - Villaverde, Vanesa Ausín
AU - Sáez Velasco, Sara
AU - Delgado Benito, Vanesa
AU - Vicente MacArrón, Jesús
AU - Guevara, José Cordero
AU - Louis, Elan D.
AU - Benito-León, Julián
N1 - Funding Information:
The authors gratefully acknowledge the vital assistance of the Consejeria de Educación de Castilla y León, and the schools, students, and parents who participated in this study. This study was supported by Gerencia Regional de Salud Castilla y León (Biomedicine Project GRS 157-A, Health Research Grant PI 070846, and European General Development Co-Funding).
PY - 2011/8
Y1 - 2011/8
N2 - Tic disorders constitute a neurodevelopmental disorder of childhood. This study sought to determine the prevalence of tic disorders in a school-based sample. A randomized sample of 1158 schoolchildren, based on clusters (classrooms) in the province of Burgos (Spain), was identified on a stratified sampling frame combining types of educational center and setting (mainstream schools and special education), using a two-phase approach (screening and diagnosis ascertainment by a neurologist). Tics with/without impairment criterion were diagnosed according to Diagnostic and Statistical Manual of Mental Disorders criteria. In mainstream schools, tics were observed in 125/741 students (16.86%; 95% confidence interval, 14.10-19.63), and were more frequent in boys (87/448, 19.42%; 95% confidence interval, 15.64-23.19) compared with girls (38/293, 12.96%; 95% confidence interval, 8.95-16.98; P = 0.03). In special education centers, tics disorders were observed in 11/54 of children (20.37%; 95% confidence interval, 8.70-32.03). Overall, tics with impairment criteria were less frequent than tics without impairment criteria (4.65% vs 11.85%, P < 0.0001). The most frequent diagnoses involved chronic motor tics (6.07%) and Tourette syndrome (5.26%). Tic disorders are common in childhood, and the use or nonuse of impairment criteria exerts a significant impact on tic prevalence estimates.
AB - Tic disorders constitute a neurodevelopmental disorder of childhood. This study sought to determine the prevalence of tic disorders in a school-based sample. A randomized sample of 1158 schoolchildren, based on clusters (classrooms) in the province of Burgos (Spain), was identified on a stratified sampling frame combining types of educational center and setting (mainstream schools and special education), using a two-phase approach (screening and diagnosis ascertainment by a neurologist). Tics with/without impairment criterion were diagnosed according to Diagnostic and Statistical Manual of Mental Disorders criteria. In mainstream schools, tics were observed in 125/741 students (16.86%; 95% confidence interval, 14.10-19.63), and were more frequent in boys (87/448, 19.42%; 95% confidence interval, 15.64-23.19) compared with girls (38/293, 12.96%; 95% confidence interval, 8.95-16.98; P = 0.03). In special education centers, tics disorders were observed in 11/54 of children (20.37%; 95% confidence interval, 8.70-32.03). Overall, tics with impairment criteria were less frequent than tics without impairment criteria (4.65% vs 11.85%, P < 0.0001). The most frequent diagnoses involved chronic motor tics (6.07%) and Tourette syndrome (5.26%). Tic disorders are common in childhood, and the use or nonuse of impairment criteria exerts a significant impact on tic prevalence estimates.
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U2 - 10.1016/j.pediatrneurol.2011.03.003
DO - 10.1016/j.pediatrneurol.2011.03.003
M3 - Article
C2 - 21763950
AN - SCOPUS:79960458173
SN - 0887-8994
VL - 45
SP - 100
EP - 108
JO - Pediatric Neurology
JF - Pediatric Neurology
IS - 2
ER -