Included studies | Publishing time | Document type | Evidence lifting factor | Grade |
Yanxia Liu [3] | 2006 | CR | Dose-response relationship (+1) Zhongjing prescription (+1) single intervention of Zhongjing prescription (+1) | High |
Jianxin Zhao [4] | 2006 | 'RCT | Limitations of the study (−2) dose-response relationship (+1) Zhongjing prescription (+1) | High |
Huiying Yang [5] | 2007 | CR | Zhongjing prescription (+1) single intervention of Zhongjing prescription (+1) | High |
Xiufen Li [6] | 2008 | 'RCT | Limitations of the study (−2) Zhongjing prescription (+1) single intervention of Zhongjing prescription (+1) | High |
Yingjie Li [7] | 2009 | CR | Zhongjing prescription (+1) single intervention of Zhongjing prescription (+1) | High |
Xinling Wang [8] | 2000 | CR | Zhongjing prescription (+1) | Medium |
Qiao Lu [9] | 2004 | CR | Zhongjing prescription (+1) | Medium |
Guozhen Chen [10] | 2005 | CR | Zhongjing prescription (+1) | Medium |