Table 1.

The methodological quality of each study using QATQS.

Study	Selection Bias	Design	Confounders	Blinding	Data Collection	Withdrawals and Dropouts	Total
Atef 2020 [29]	1	1	1	2	1	1	1
Chirico 2019 [30]	1	1	1	2	1	1	1
Feyzioğlu 2020 [31]	2	1	1	1	1	1	1
House 2016 [32]	1	2	3	1	1	2	2
McGarvey 2009 [33]	2	2	1	2	1	1	1
Mohammad 2018 [34]	2	1	1	2	1	1	1
Piejko 2020 [35]	2	2	1	2	1	2	1
Schneider 2003 [36]	3	2	1	2	1	2	2
Schneider 2004 [37]	3	2	1	2	1	1	2
Schneider 2007 [38]	3	2	1	2	1	1	2
Schneider 2011 [39]	2	2	1	2	1	1	1

1—strong; 2—moderate; 3—weak.