Table 2.
Risk of Bias of the studies included in the Systematic Review
| Author (Year) | Type of study | Random sequence generation | Allocation concealment | Blinding of participants | Blinding of outcome | Incomplete outcome data | Selective reporting |
|---|---|---|---|---|---|---|---|
| Shimada Y, Tai H, Tanak A, Suzuki I, Takagi K (2009)16 | Randomized controlled clinical trail | yes | yes | yes | not clear | not clear | not clear |
| Yussif NM, Zayed SO, Hasan SA, Sadek SS (2016)5 | Experimental study | yes | yes | not clear | not clear | not clear | not clear |
| Yussif NM, Abdel Rahman AR, Elbarbary E (2019)17 | Experimental study | no | no | no | no | no | not clear |
| Ratnam AV, Sastry PB, Satyanarayana BV (1977)18 | Experimental study | no | no | no | no | no | not clear |
| Kameyama K, Sakai C, Kondoh S, Yonemoto K, Nishiyama S, Tagawa M (1996)19 | Experimental study | no | no | no | no | no | not clear |
| Kim HM, An HS, Bae JS, Kim JY, Choi CH, Kim JY (2017)20 | Experimental study | not clear | not clear | yes | yes | not clear | not clear |
| Jaros A, Zasada M, Budzisz E, Debowska R, Rzepka MG, Rotsztejn H (2019)21 | Experimental study | no | no | no | no | no | not clear |