Table 2.
Methodological quality for each included study.
| Study | Sequence generation | Allocation concealment | Blinding | Withdraw | Baseline | ITT | Score |
|---|---|---|---|---|---|---|---|
| Sun Haiyun et al. | unclear | high risk | high risk | low risk | low risk | low risk | B |
| Wei LIn'an et al. | unclear | unclear | unclear | low risk | low risk | low risk | A |
| Cheng Shuang et al. | low risk | high risk | high risk | low risk | low risk | low risk | B |
| Liu Shanshan et al. | unclear | high risk | high risk | low risk | low risk | low risk | B |
| Lai Shuying et al. | low risk | high risk | high risk | low risk | low risk | low risk | B |
| Zhang Ying et al. | low risk | high risk | high risk | low risk | low risk | low risk | B |
| Wu Jing | low risk | high risk | high risk | low risk | low risk | low risk | B |
| Ye Liying et al. | low risk | high risk | high risk | low risk | low risk | low risk | B |
| Lai Ai-ru et al. | low risk | high risk | high risk | low risk | low risk | low risk | B |
| Hosein Dalili et al. | unclear | high risk | high risk | low risk | low risk | low risk | B |
| Lin, Chien-Heng et al. | unclear | high risk | high risk | low risk | low risk | low risk | B |
| Alehe Seyyedrasooli et al. | low risk | low risk | high risk | low risk | low risk | low risk | A |
| Jun Chen et al. | unclear | high risk | high risk | high risk | low risk | high risk | B |
| Mahdi BasiriMoghadam et al. | low risk | low risk | low risk | low risk | low risk | low risk | A |
Blinding: whether patients, care providers and outcome assessors were blinded. Intention-to-treat (ITT): whether trial authors performed analyses to take into account all patients who began the intervention regardless of protocol violations, drop-outs or loss of follow-up.
Sequence generation:low risk[Specific random method was reported]; unclear[Random was mentioned, but the specific random method was not reported]; high risk[Random was not mentioned].
Allocation concealment:low risk[Specific method of allocation concealment was reported]; unclear[Allocation concealment was mentioned, but the specific method of allocation concealment was not reported]; high risk[Allocation concealment was not mentioned].
Blinding:low risk[Specific blinding method was reported]; unclear[Blinding was mentioned, but the specific blinding method was not reported]; high risk[Blinding was not mentioned].
Withdraw:low risk[There was no withdraw, or withdraw was properly handled]; unclear[The method of handling withdraw was not clearly reported]; high risk[Withdraw was not handled].
Baseline:low risk[All factors at baseline were comparable]; unclear[Partly factors at baseline were comparable]; high risk[All factors at baseline were not comparable].
ITT:low risk[There was no need for intentional analysis, or appropriate intentional analysis was carried out]; unclear[Intentional analysis is unclear]; high risk[Appropriate intentional analysis was not carried out].