Randomized Clinical Trials* | ||||||||||||||
| Was the study described as randomized? | Was the method used to generate the sequence of randomization described and appropriate? | Was there a description of random sequences concealment? | Was the method of random sequences concealment described and appropriate? | Was the study described as double-blind? | Was the method of double-blinding described and appropriate? | Was there a description of withdrawals and dropouts? | Total | ||||||
Zhu et al. [25] | 1 | 0 | 1 | 0 | 0 | 0 | 1 | 3 | ||||||
Nayan et al. [24] | 1 | 0 | 1 | 0 | 0 | 0 | 1 | 3 | ||||||
Crehange et al. [22] | 1 | 0 | 1 | 0 | 0 | 0 | 1 | 3 | ||||||
You et al. [18] | 1 | 1 | 1 | 1 | 0 | 0 | 1 | 5 | ||||||
Hulshof et al. [20] | 1 | 1 | 1 | 1 | 0 | 0 | 1 | 5 | ||||||
Xu et al. [19] | 1 | 1 | 1 | 1 | 0 | 0 | 1 | 5 | ||||||
Non-randomized clinical trial** | ||||||||||||||
| Representative of Exposed Cohort | Selection of Non-Exposed Cohort | Ascertainment of Exposure | Demonstration That Outcome of Interest Was Not Present at Start of Study | Control for Important Factors | Additional Factors | Assessment of Outcome | Follow-Up | Adequacy of Follow-Up |
| ||||
Ma et al. [23] | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | 9 | ||||