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Forest plots comparing the prevalence of psychiatric comorbidities (A–F), age of tic onset (G) in individuals with persistent motor and vocal tics (PMVT) and Tourette syndrome (TS), and proportion of individuals with pure motor tics (H) stratified by sample size. ADHD, attention deficit hyperactivity disorder; CI, confidence interval; OCD, obsessive–compulsive disorder; OR, odds ratio. [Color figure can be viewed at wileyonlinelibrary.com]
