Table 2 Raw data and methodological quality of included trials
Studies | Region | Sequence generation | Allocation concealment | Blind | Outcome data | Selective outcome reporting | Other sources of bias | ITT | Risk of bias |
|---|---|---|---|---|---|---|---|---|---|
Yunfang et al. [15] | Single center | Random number table (SAS) | Insufficient | Clear | No | No | Unclear | Yes | Low risk of bias |
Sijie et al. [13] | Single center | Random number table (SPSS) | Unclear | Unclear | Yes | No | Clear | No | Unclear risk of bias |
Zenmin et al. [9] | Single center | Random number table (SPSS) | Insufficient | Unclear | Yes | No | Unclear | No | Low risk of bias |
Daiju and Xiaodong [19] | Single center | unclear | Unclear | Clear | Yes | No | Unclear | No | Unclear risk of bias |
Zhiwen et al. [12] | Single center | Random number table (SPSS) | Unclear | Unclear | Yes | No | Clear | No | Unclear risk of bias |
Liangfa et al. [11] | Single center | Random number table (SPSS) | Clear | Clear | Yes | No | Clear | No | Unclear risk of bias |
Xiaowei et al. [10] | Single center | Random number table (SPSS) | Insufficient | Unclear | Yes | No | Clear | No | Unclear risk of bias |
Guoan [18] | Single center | Random number table (SPSS) | Clear | Unclear | Yes | Yes | Clear | No | Unclear risk of bias |
Li [8] | Single center | Random number table (SAS) | Insufficient | Unclear | Yes | No | Clear | No | Unclear risk of bias |
Ziqiang [14] | Single center | Random number table (SPSS) | Unclear | Unclear | Yes | No | Unclear | No | Unclear risk of bias |
Yushun and Jie [16] | Single center | Random number table (SPSS) | Insufficient | Clear | Yes | No | Unclear | No | Low risk of bias |
Zhenfeng et al. [17] | Single center | Random number table (SPSS) | Clear | Clear | Yes | No | Clear | No | Unclear risk of bias |