Table 2.

Assessment of the articles quality based on the Newcastle-Ottawa scale (NOS) [16]

Author, year, type of study	Selection	Comparability	Outcomes	Total Score	Assessment
	1 2 3 4	5	6 7 8
Braghetto, 2010, prospective [18]	- - * *	- -	* - *	4	Poor
Gorodner, 2015, prospective [19]	* - * *	- -	* * -	5	Poor
Valezi, 2017, prospective [20]	* * * *	* -	* * *	8	Good
De Angulo, 2019, prospective [21]	* - * *	- -	* * *	6	Poor
Sioka, 2017, prospective [22]	* - * *	- -	* * *	6	Poor
Rebecchi, 2014, prospective [23]	* - * *	- -	* * *	6	Poor
Kleidi, 2013, prospective [24]	* - * *	- -	* - *	5	Poor
Gemici, 2020, retrospective [25]	* - * *	- -	* - *	5	Poor
Coupaye, 2018, prospective [26]	- - * *	- -	* * *	5	Poor
Del Genio 2014, prospective [27]	* - * *	- -	* * *	6	Poor
Tolone, 2020, prospective [28]	* - * *	- *	* * *	7	Fair
Burgerhart, 2014, prospective [29]	* - * *	- -	* - *	5	Poor
Georgia, 2017, prospective [30]	* - * *	- -	* * *	6	Poor
Świdnicka-Siergiejko, 2018, prospective [31]	* - * *	- -	* * *	6	Poor
Thereaux, 2016, prospective [32]	* * * *	* *	* - *	8	Good
Yormaz, 2017, retrospective [33]	* * * *	* *	* * *	9	Good