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Patients underwent an open or arthroscopic modified Brostr\u00f6m procedure based on the time when they attended the clinic for consultation. All patients were followed\u2010up at 3, 6, 12, and 24\u00a0months postoperatively. The clinical outcomes were evaluated using the visual analogue scale (VAS), American Orthopaedic Foot and Ankle Society (AOFAS) score, and Karlsson score, and the radiographic outcomes were assessed using stress radiography at 24\u00a0months postoperatively. The time to return to work and the failure rate were also evaluated and compared.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Follow\u2010up was completed for 31 patients in the open group and 30 patients in the arthroscopic group. No significant differences were found between the two groups in terms of demographic characteristics, Beighton score (6.2\u2009\u00b1\u20091.9 vs. 5.5\u2009\u00b1\u20091.4, n.s.), or duration of symptoms. There were no significant differences in the functional scores before surgery and at 6, 12 and 24\u00a0months postoperatively or in the mean anterior translation of the talus and talar tilt angle on stress radiography at 24\u00a0months postoperatively between the open and arthroscopic groups. Compared to the open group, the arthroscopic group showed a significantly earlier return to work (6.8\u2009\u00b1\u20092.1 vs. 8.1\u2009\u00b1\u20092.4 weeks, <jats:italic>p<\/jats:italic>\u2009=\u20090.006). There was no significant difference in terms of the failure rate between the open and arthroscopic groups (16.1% vs. 23.3%, n.s.).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>Arthroscopic modified Brostr\u00f6m procedure achieved similar short\u2010term outcomes to the open procedure for GJL patients. Arthroscopic modified Brostr\u00f6m procedure showed an earlier return to work than the open modified Brostr\u00f6m procedure and was an alternative to open surgery for CLAI patients with GJL.<\/jats:p><\/jats:sec><jats:sec><jats:title>Level of evidence<\/jats:title><jats:p>III.<\/jats:p><\/jats:sec><jats:sec><jats:title>Clinical trial registration<\/jats:title><jats:p>This study is a prospective study NCT05284188.<\/jats:p><\/jats:sec>","DOI":"10.1007\/s00167-023-07431-x","type":"journal-article","created":{"date-parts":[[2023,5,11]],"date-time":"2023-05-11T02:08:00Z","timestamp":1683770880000},"page":"4043-4051","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":17,"title":["Arthroscopic modified Brostr\u00f6m procedure achieved similar favorable short term outcomes to open procedure for chronic lateral ankle instability cases with generalized joint laxity"],"prefix":"10.1002","volume":"31","clinical-trial-number":[{"clinical-trial-number":"nct05284188","registry":"10.18810\/clinical-trials-gov"}],"author":[{"given":"An\u2010hong","family":"Wang","sequence":"first","affiliation":[{"name":"<!--<label>1<\/label>--> Department of Sports Medicine Peking University Third Hospital, Institute of Sports Medicine of Peking University Beijing China"},{"name":"<!--<label>2<\/label>--> Beijing Key Laboratory of Sports Injuries Beijing China"},{"name":"<!--<label>3<\/label>--> Engineering Research Center of Sports Trauma Treatment Technology and Devices Ministry of Education Beijing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tong","family":"Su","sequence":"additional","affiliation":[{"name":"<!--<label>1<\/label>--> Department of Sports Medicine Peking University Third Hospital, Institute of Sports Medicine of Peking University Beijing China"},{"name":"<!--<label>2<\/label>--> Beijing Key Laboratory of Sports 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