Table 1.

Quality assessment of the included studies based on the Newcastle–Ottawa Scale.

NO.	Author and year	Selection	Comparability	Outcome	Score
1	Kratochwil et al. (12)	3	1	3	7
2	Sathekge et al. (13)	3	1	3	7
3	van der Doelen et al. (14)	3	1	3	7
4	Satapathy et al. (15)	3	1	2	6
5	Feuerecker et al. (16)	2	1	3	6
6	Sen et al. (17)	3	1	3	7