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There have been no international large\u2010scale studies of patient experiences of FND.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>A patient questionnaire was created to assess FND patient characteristics, symptom comorbidities and illness perceptions. Respondents were recruited internationally through an open access questionnaire via social media and patient groups over a month\u2010long period.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>In total, 1048 respondents from 16 countries participated. Mean age was 42\u00a0years (86% female). Median FND symptom duration was 5\u00a0years, and median time from first symptom to diagnosis was 2\u00a0years. Mean number of current symptoms (core FND and associated) was 9.9. Many respondents had associated symptoms, for example fatigue (93%), memory difficulties (80%) and headache (70%). Self\u2010reported psychiatric comorbidities were relatively common (depression, 43%; anxiety, 51%; panic, 20%; and post\u2010traumatic stress disorder, 22%). Most respondents reported that FND had multiple causes, including physical and psychological.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>This large survey adds further evidence that people with FND typically have high levels of multiple symptom comorbidity with resultant distress. It also supports the notion that associated physical symptoms are of particular clinical significance in FND patients. Dualistic ideas of FND were not supported by respondents, who generally preferred to conceptualize the disorder as one at the interface of mind and brain. The need for a broad approach to this poorly served patient group is highlighted. Potential selection and response biases due to distribution of the survey online, mostly via FND patient groups, are a key limitation.<\/jats:p><\/jats:sec>","DOI":"10.1111\/ene.15018","type":"journal-article","created":{"date-parts":[[2021,7,10]],"date-time":"2021-07-10T18:55:13Z","timestamp":1625943313000},"page":"3591-3602","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":119,"title":["International online survey of 1048 individuals with functional neurological disorder"],"prefix":"10.1111","volume":"28","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9734-6539","authenticated-orcid":false,"given":"Matthew","family":"Butler","sequence":"first","affiliation":[{"name":"Institute of Psychiatry, Psychology and Neuroscience King's College London London UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Oliver","family":"Shipston\u2010Sharman","sequence":"additional","affiliation":[{"name":"Royal Surrey County 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