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The aim of the present study was to evaluate whether sociodemographic factors such as sex, age, residence, household income, and metabolic diseases such as hypertension, diabetes, and dyslipidemia were risk factors for Bell\u2019s palsy using the National Health Insurance Service National Sample Cohort data of Korea. Patients who visited an outpatient clinic twice or\u00a0more or had one or\u00a0more admission and received steroid medication under the International Classification of Diseases diagnostic codes for Bell\u2019s palsy from 2006 to 2015 were defined as patients with Bell\u2019s palsy in this study. The associations between sociodemographic factors and metabolic diseases to Bell\u2019s palsy were analyzed with univariate and multivariate Cox proportional hazard regression models. There were 2708 patients with Bell\u2019s palsy recorded from 2006 to 2015. Male sex, advanced age, residence in a location other than the capital and metropolitan cities, hypertension, and diabetes were significant risk factors for Bell\u2019s palsy. This study is significant for patients and providers because we analyzed the relationships using a population-based database over a long-term follow-up period.<\/jats:p>","DOI":"10.1038\/s41598-021-02816-9","type":"journal-article","created":{"date-parts":[[2021,12,3]],"date-time":"2021-12-03T11:03:41Z","timestamp":1638529421000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":34,"title":["Risk factors for Bell\u2019s palsy based on the Korean National Health Insurance Service National Sample Cohort data"],"prefix":"10.1038","volume":"11","author":[{"given":"Junhui","family":"Jeong","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"So Ra","family":"Yoon","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hyunsun","family":"Lim","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jangwon","family":"Oh","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hyun Seung","family":"Choi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2021,12,3]]},"reference":[{"key":"2816_CR1","doi-asserted-by":"publisher","first-page":"4","DOI":"10.1080\/000164802760370736","volume":"122","author":"E Peitersen","year":"2002","unstructured":"Peitersen, E. 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