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Table 1 Characteristics of included studies

From: Does arthroscopic repair show superiority over open repair of lateral ankle ligament for chronic lateral ankle instability: a systematic review and meta-analysis

Study Year LOE Type of study Country No. of patients Age(years) Operative technique Follow-up (months) Operative time
Yeo et al. 2016 1 RCT Republic of Korea 48 AS 25 35.2 AS-assisted Broström–Gould, 1 suture anchors 12 2012–2014
       Open 23 34.3 Broström–Gould, 1 suture anchors 12  
Matsui et al. 2016 3 Retrospective cohort Japan 37 AS 19 28 All-inside Broström–Gould, 2 suture anchors 12 2013–2014
       Open 18 24 Broström–Gould, 2 suture anchors 12  
Li et al. 2017 3 Prospective cohort China 60 AS 23 30.3 All-inside Broström–Gould, 1/2 suture anchors 39.7 2012–2014
       Open 37 28.7 Broström–Gould, 1/2 suture anchors 35.5  
Rigby et al. 2018 3 Retrospective cohort USA 62 AS 30 47.9 AS-assisted Broström–Gould, 2 suture anchors 15.6 2009–2013
       Open 32 37.7 Broström–Gould, 2 suture anchors 44.4  
DeVries et al. 2019 3 Retrospective cohort USA 55 AS 43 44.7 All-AS Broström–Gould, 2 suture anchors 24.2 2014–2016
       Open 12 39.5 Broström–Gould, 2 suture anchors 21  
Yi et al. 2019 3 Retrospective cohort China 65 AS 35 39.3 All-inside Broström–Gould, 1 suture anchors 26 2014–2017
       Open 30 37.3 Broström–Gould, 1 suture anchors 26  
Zeng et al. 2020 3 Retrospective cohort China 27 AS 17 30.9 All-AS Broström–Gould, 1 suture anchors 36 2013-2015
       Open 10 27.7 Broström–Gould, 1 suture anchors 36  
Xu et al. 2020 3 Retrospective cohort China 67 AS 32 33.7 Arthroscopic-assisted Broström, 1/2 suture anchors 36.5 2015–2017
       Open 35 35.8 Broström–Gould, 1/2 suture anchors 39.1  
Woo et al. 2020 3 Retrospective cohort Singapore 52 AS 26 33.4 All-AS Broström–Gould, 2 suture anchors 12 2015–2019
       Open 26 31.5 Broström–Gould, 1 suture anchors 12  
  1. Abbreviations: LOE level of evidence, RCT randomized controlled trial, AS arthroscopic