Table 2.

Quality assessment according to the Jadad scale.

Jadad Scale for Reporting Randomized Controlled Trials [15]
Author	Ristow et al. [21]	Mohammed and Delemi [21]	Genc et al. [23]	Erdil et al. [24]	de Rocha Heras et al. [25]
Randomization present	1	1	1	1	1
Appropriate randomization used	1	1	1	1	1
Blinding present	0	0	1	1	1
Appropriate blinding used	0	0	1	0 *	1
Appropriate long-term follow-up for all patients	1	1	1	1	1
Total	3	3	5	4	5
Author	Gözlüklü et al. [26]	Tatli et al. [27]	Mohammed and Delemi [28]	Chiang et al. [29]	Yurttutan and Sancak [30]
Randomization present	1	1	1	1	1
Appropriate randomization used	1	1	1	1	1
Blinding present	1	0	0	0	0
Appropriate blinding used	1	0	0	0	0
Appropriate long-term follow-up for all patients	1	1	1	0	1
Total	5	3	3	2	3

*—insufficiently described.