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Here, we determine rates of psychiatric diagnoses and psychiatric medication prescription in those diagnosed with idiopathic dystsuponia compared to matched controls.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>A longitudinal population\u2010based cohort study using anonymized electronic health care data in Wales (UK) was conducted to identify individuals with idiopathic dystonia and comorbid psychiatric diagnoses\/prescriptions between 1 January 1994 and 31 December 2017. Psychiatric diagnoses\/prescriptions were identified from primary and secondary health care records.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Individuals with idiopathic dystonia (<jats:italic>n<\/jats:italic>\u00a0=\u200952,589) had higher rates of psychiatric diagnosis and psychiatric medication prescription when compared to controls (<jats:italic>n<\/jats:italic>\u00a0=\u2009216,754, 43% vs. 31%, <jats:italic>p<\/jats:italic>\u00a0&lt;\u20090.001; 45% vs. 37.9%, <jats:italic>p<\/jats:italic>\u00a0&lt;\u20090.001, respectively), with depression and anxiety being most common (cases: 31% and 28%). Psychiatric diagnoses predominantly predated dystonia diagnosis, particularly in the 12 months prior to diagnosis (incidence rate ratio [IRR]\u2009=\u20091.98, 95% confidence interval [CI]\u2009=\u20091.9\u20132.1), with an IRR of 12.4 (95% CI\u00a0=\u00a011.8\u201313.1) for anxiety disorders. There was, however, an elevated rate of most psychiatric diagnoses throughout the study period, including the 12 months after dystonia diagnosis (IRR\u00a0=\u00a01.96, 95% CI\u00a0=\u00a01.85\u20132.07).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>This study suggests a bidirectional relationship between psychiatric disorders and dystonia, particularly with mood disorders. Psychiatric and motor symptoms in dystonia may have common aetiological mechanisms, with psychiatric disorders potentially forming prodromal symptoms of idiopathic dystonia.<\/jats:p><\/jats:sec>","DOI":"10.1111\/ene.15530","type":"journal-article","created":{"date-parts":[[2022,8,23]],"date-time":"2022-08-23T08:39:35Z","timestamp":1661243975000},"page":"3513-3527","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":16,"title":["Longitudinal analysis of the relationship between motor and psychiatric symptoms in idiopathic dystonia"],"prefix":"10.1111","volume":"29","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4646-3134","authenticated-orcid":false,"given":"Grace A.","family":"Bailey","sequence":"first","affiliation":[{"name":"Neuroscience and Mental Health Research Institute, Division of Psychological Medicine and Clinical Neurosciences Cardiff University School of Medicine  Cardiff 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