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We conducted a meta-analysis to assess the reported risk factors and MCAT risk.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>We collected relevant studies on the risk factors for MCAT by searching the PubMed, Embase, The Cochrane Library, China Biology Medicine (CBM), WanFang Data, VIP and CNKI databases. The search period ranged from the establishment of the database to November 2019.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      Twenty-five of the 458 identified studies were eligible for the meta-analysis. Seven retrospective cohort studies and 18 case-control studies were included, and 14 risk factors for MCAT were extracted.\n                      <jats:bold>Meta-analyses of the association between MCAT and risk factors related to the patient\u2019s preoperative condition included a<\/jats:bold>\n                      preoperative history of MC, preoperative bulbar symptoms, IIa\u2009+\u2009IIb\u2009+\u2009III\u2009+\u2009VI, IIb\u2009+\u2009III\u2009+\u2009VI, VI\u2009+\u2009V, dosage of pyridostigmine bromide prior to the operation, a preoperative AchR-Ab level\u2009&gt;\u2009100 (nm\/L), preoperative pulmonary function, preoperative complications, and preoperative disease course.\n                      <jats:bold>Meta-analyses of the association between MCAT and surgery-related risk factors included<\/jats:bold>\n                      intraoperative blood loss &gt;\u20091000\u2009mL and the mode of operation.\n                      <jats:bold>Meta-analyses of the association between MCAT and postoperative risk factors included<\/jats:bold>\n                      postoperative lung infection, thymoma and the WHO classification. The operation time was not an independent risk factor for MCAT.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>The independent risk factors for MCAT were a preoperative history of MC, preoperative bulbar symptoms, preoperative MG Osserman stage, preoperative dosage of pyridostigmine bromide, preoperative serum AchR-Ab level, lung function, major postoperative complications, disease duration before thymectomy, blood loss, thoracotomy, postoperative lung infection, thymoma, and WHO classification.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1186\/s13019-020-01320-x","type":"journal-article","created":{"date-parts":[[2020,9,29]],"date-time":"2020-09-29T10:04:04Z","timestamp":1601373844000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":31,"title":["Assessment of the risks of a myasthenic crisis after thymectomy in patients with myasthenia gravis: a systematic review and meta-analysis of 25 studies"],"prefix":"10.1186","volume":"15","author":[{"given":"Chaoying","family":"Liu","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Peng","family":"Liu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiao jing","family":"Zhang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wen qian","family":"Li","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Guoyan","family":"Qi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2020,9,29]]},"reference":[{"key":"1320_CR1","doi-asserted-by":"publisher","first-page":"403","DOI":"10.1515\/med-2017-0058","volume":"12","author":"G Qi","year":"2017","unstructured":"Qi G, Xue Y, Li Y, et al. 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