Table 2.
The Risk Bias Evaluation of Articles
| Article names | Random collection method | Allocation concealment | The blinding method | Outcome data integrity | The outcome data of selective report | no other bias sources | The level of bias risk |
|---|---|---|---|---|---|---|---|
| Huang W.K.30 2013 | U | U | U | Y | U | U | High |
| Cao Y.31 2014 | Y | U | U | Y | U | Y | Low |
| Zeng C.S.32 2012 | Y | U | U | Y | U | Y | Low |
| Dong M.E.34 2014 | N | U | U | Y | U | U | High |
| Feng X.M.35 2012 | U | U | N | Y | U | U | High |
| Fu Z.L.36 2010 | Y | Y | U | Y | U | N | Low |
| He S.L.37 2012 | U | U | U | Y | U | N | High |
| Ji J.F.38 2015 | U | U | U | Y | U | U | High |
| Jia C.H.39 2008 | N | U | U | Y | U | U | High |
| Jiang C.Y.40 2013 | U | U | U | Y | U | U | High |
| Ke J.41 2011 | U | U | U | Y | U | U | High |
| Kou C.Y.42 2011 | U | U | U | Y | U | U | High |
| Li B.43 2013 | U | U | U | Y | U | U | High |
| Li J.44 2013 | U | U | U | Y | U | U | High |
| Li Q.45 2008 | Y | Y | U | Y | U | U | Low |
| Li Q.M.46 2003 | U | U | U | Y | U | U | High |
| Li W.H.47 2006 | U | U | N | Y | U | U | High |
| Liang B.L.48 2010 | Y | U | U | Y | U | U | High |
| Liang C.X.49 2015 | Y | U | U | Y | U | U | High |
| Liang T.J.50 2005 | N | U | U | Y | U | U | High |
| Liang Y.51 2008 | U | U | N | N | U | U | High |
| Liu X.H.52 2009 | U | U | N | Y | U | U | High |
| Liu Y.Q.53 2010 | U | U | U | Y | U | U | High |
| Lu S.J.54 2014 | U | U | U | Y | U | U | High |
| Peng W.D.55 2011 | U | U | U | Y | U | U | High |
| Qu J.R.56 2012 | U | U | U | Y | U | U | High |
| Shen J.J.57 2009 | U | U | U | Y | U | U | High |
| Shen J.J.58 2015 | U | U | U | Y | U | U | High |
| Shu X.H.59 2004 | U | U | U | Y | U | U | High |
| Su Y.60 2013 | U | U | U | Y | U | U | High |
| Sun Z.J.61 2002 | U | U | U | Y | U | U | High |
| Tang J.G.62 1999 | U | U | U | Y | U | U | High |
| Tian X.L.63 2006 | U | U | U | N | U | U | High |
| Wang C.J.64 2001 | U | U | U | Y | U | U | High |
| Wang L.J.65 2007 | U | U | N | Y | U | U | High |
| Wang Q.C.66 2013 | U | U | U | Y | U | U | High |
| Wei Y.F.67 2015 | U | U | Y | N | U | U | High |
| Wu H.M.68 2000 | U | U | U | Y | U | U | High |
| Wu J.Y.69 2006 | U | U | U | Y | U | U | High |
| Wu J.S.70 2015 | U | U | U | Y | U | U | High |
| Wu Z.M.71 2010 | U | U | U | Y | U | U | High |
| Xiao X.S.72 2011 | N | U | N | Y | U | U | High |
| Xie J.73 2015 | U | U | N | Y | U | U | High |
| Xie Y.F.74 2003 | Y | Y | U | Y | U | U | Low |
| Xu Y.S.75 2011 | U | U | U | Y | U | U | High |
| Xue Q.76 2010 | U | U | U | Y | U | U | High |
| Yang P.Y.77 2013 | U | U | U | Y | U | U | High |
| You S.Y.78 2006 | U | U | N | Y | U | U | High |
| Yu J.G.79 2013 | U | U | U | Y | U | U | High |
| Yuan C.Y.80 2007 | U | U | U | Y | U | U | High |
| Zhang B.81 2007 | U | U | U | Y | U | U | High |
| Zhang C.Q.82 2005 | U | U | U | N | U | U | High |
| Zhang M.J.83 2011 | U | U | U | Y | U | U | High |
| Zhang T.S.84 2011 | U | U | U | N | U | U | High |
| Zhu W.Q.85 2014 | U | U | U | Y | U | U | High |
| Deng Z.Y.33 2015 | U | U | U | Y | U | N | High |
| Zhou J.S.86 2006 | U | U | U | Y | U | U | High |
Note: Y refers to “yeas”; N refers to “no”; U refers to “unclear”.