Journal of Sports Science and Medicine

Table 2. The Newcastle-Ottawa Assessment scale for included nonrandomized trials.

Study	Selection				Comparability of Cases and Control	Outcome
Study	Case Definition Adequacy	Repres¹ of Case	Selection of Controls	Definition of Controls	Comparability of Cases and Control	Asc ² of Exposure	Same Method of Asc ² for Cases and Controls	Nonresponse Rate	Total
Alentorn-Geli, 2010	â‹†		â‹†	â‹†	â‹†	â‹†	â‹†		6
Azboy, 2014	â‹†	â‹†	â‹†	â‹†	â‹†	â‹†	â‹†	â‹†	8
Cury, 2017	â‹†		â‹†	â‹†	â‹†		â‹†	â‹†	6
de Abreu, 2014		â‹†	â‹†	â‹†	â‹†	â‹†	â‹†	â‹†	7
Franceschi, 2013		â‹†	â‹†	â‹†	â‹†	â‹†	â‹†		6
Kim, 2011	â‹†		â‹†	â‹†	â‹†		â‹†	â‹†	6
Lee, 2014	â‹†		â‹†	â‹†	â‹†	â‹†	â‹†	â‹†	7
Metso, 2020	â‹†		â‹†	â‹†	â‹†	â‹†	â‹†	â‹†	7
Ozer, 2018	â‹†		â‹†	â‹†	â‹†	â‹†	â‹†		6
Pande, 2017		â‹†	â‹†	â‹†	â‹†	â‹†	â‹†	â‹†	7
Razazadeh, 2016	â‹†	â‹†	â‹†	â‹†	â‹†	â‹†	â‹†	â‹†	8
Sohn, 2014	â‹†		â‹†	â‹†	â‹†		â‹†	â‹†	6
Sukur, 2016	â‹†	â‹†	â‹†	â‹†	â‹†	â‹†	â‹†	â‹†	8
Taşdemir, 2015	â‹†		â‹†	â‹†	â‹†	â‹†	â‹†	â‹†	7
Wei, 2014	â‹†		â‹†	â‹†	â‹†	â‹†		â‹†	6
Zehir, 2015	â‹†	â‹†		â‹†	â‹†	â‹†	â‹†	â‹†	7

¹ Repres = Representativenes;

² Asc = Ascertainment