Table 2.

Risk of bias for included studies.

Author (Year)	Location	Detailed Reasons for Selected Population	Detailed Description of Sampling and Measurement Method	Study Participation	Outcome Measurement
B.P. Schoennagel, 2014	Germany	Adult patients with acute ankle trauma that presented in our emergency unit	Yes	low 5	low 3
M.Takao,2003	Japan	Patients with acute injuries of the ankle which were treated surgically	Yes	moderate 4	low 3
Oaek,2003	Japan	Patients with ankle sprains and distal fibular fractures underwent surgery and ankle arthroscopy	Yes	moderate 4	low3
T.K. Ahn,2017	Korea	Who underwent an arthroscopic examination for the syndesmosis injury	Yes	low 6	low 3
T.W.Yeung, 2015	Hongkong	Patients who received CT scan for preoperative assessment with subsequent operation performed were in	Yes	low 5	low 3
S.J. Kim,2007	Korea	Who had a history of repeated ankle sprain and who had undergone MRI and arthroscope surgery	Yes	moderate 4	low 3
M.Takao,2003	Japan	Patients with acute injuries of the ankle which were treated surgically	Yes	moderate 4	low 3
Oae K,2003	Japan	Patients with ankle sprains and distal fibular fractures underwent surgery and ankle arthroscopy	Yes	moderate 4	low 3
T. Clanton, 2014	USA	Who underwent arthroscopically assisted surgery for ankle pathology and suspected syndesmosis injury	Yes	low 6	moderate 2
Chirsto.G,1995	Greece	Who had Weber type B and C ankle fracture	Yes	low 5	low 3