Table 3. Newcastle-Ottawa assessment scale of study quality.

Author	Year	Selection				Comparability	Outcomes			Points	RoB
		1	2	3	4	1	1	2	3
Aboal et al [18]	2024	*	—	*	*	*	*	*	—	6	Low
Abrahim et al [28]	2024	*	*	*	*	—	*	*	—	6	M-H
Aldajani et al [29]	2024	*	*	*	*	*	*	*	—	7	Low
Anai et al [15]	2024	*	—	*	*	—	*	—	—	4	M-H
Arinaga et. al. [30]	2023	*	—	*	*	**	—	*	—	7	Low
Astarcioglu et al [9]	2015	*	*	*	*	*	—	—	—	5	M-H
Bendary et al [19]	2019	*	—	*	*	**	*	*	—	7	Low
Bladin et al [20]	2023	*	—	—	*	*	*	*	—	5	M-H
Brouillette et al [16]	2022	*	*	*	*	*	*	*	—	7	Low
Chao et al [24]	2017	*	*	*	*	*	*	*	—	7	Low
Cordero et al [17]	2014	-	*	*	*	—	—	—	—	3	M-H
Dickson et al [31]	2014	*	*	*	*	—	**	*	—	7	M-H
Ibanez et al [21]	2019	*	*	*	*	**	—	*	—	7	Low
Kang et al [25]	2024	-	*	*	*	*	—	*	—	5	M-H
Kini et al [32]	2024	*	—	*	*	—	*	*	—	5	M-H
Kohashi et al [33]	2023	*	*	*	*	**	*	*	*	9	Low
Liu et al [26]	2020	*	*	*	*	*	*	*	—	7	Low
Park et al [22]	2016	*	—	*	*	—	—	—	—	3	M-H
Studencan et al [34]	2018	*	—	*	*	*	*	*	—	6	Low
Yu et al [27]	2019	*	—	*	—	*	—	—	*	4	M-H
Yufu et al [23]	2019	*	*	*	*	**	—	*	*	8	Low

^aRoB: risk of bias.

^bM-H: medium to high.