Characteristics of tics in follow-up study of community-based high risk cohort of 2511 children

Background:Although several studies have aimed to investigate risk factors for occurrence of tics as well as determinants of tic remission or exacerbation, previous findings regarding this research questions were conflicting. Moreover, all of these studies were done in cohort of patients examined in centers specialized in tics and, therefore, in patients with more severe phenotype.