Table 2 Methodological quality assessment by adjusted Jadad scale
Author | Random sequence generation | Allocation concealment | Blinding of participants | Dropout Addressed | ITT |
|---|---|---|---|---|---|
Tang 2009 | Unclear | Unclear | Unclear | Adequate | Y |
Verettas 2010 | Adequate | Unclear | Unclear | Adequate | Y |
Zou 2009 | Inadequate | Unclear | Unclear | Unclear | Y |
Xu 2010 | Adequate | Adequate | Adequate | Adequate | Y |
Wang 2010 | Inadequate | Unclear | Unclear | Unclear | N |
Peyser 2007 | Adequate | Adequate | Adequate | Adequate | Y |
Ahrengart 2002 | Adequate | Adequate | Adequate | Adequate | Y |
Xu 2010 | Adequate | Adequate | Adequate | Adequate | Y |
Butt 1995 | Adequate | Adequate | Adequate | Unclear | Y |
Leung 1992 | Adequate | Adequate | Inadequate | Adequate | Y |
Kosygan 2002 | Adequate | Adequate | Adequate | Adequate | Y |
Peter 1995 | Adequate | Adequate | Adequate | Adequate | Y |
Kukla 1997 | Adequate | Adequate | Adequate | Adequate | Y |
Yang 2011 | Adequate | Adequate | Adequate | Adequate | Y |
Hoffman 1996 | Adequate | Adequate | Adequate | Adequate | Y |
Garg 2011 | Adequate | Unclear | Unclear | Adequate | N |
Guo 2013 | Adequate | Adequate | Unclear | Adequate | Y |
Brandt 2002 | Adequate | Adequate | Adequate | Adequate | Y |
Aktselis 2014 | Inadequate | Unclear | Unclear | Adequate | Y |
Vaquero2012 | Adequate | Adequate | Adequate | Adequate | Y |
Utrilla 2005 | Adequate | Adequate | Adequate | Adequate | Y |
Goldhagen 1994 | Adequate | Unclear | Unclear | Unclear | Y |
Christopher | Adequate | Adequate | Adequate | Adequate | Y |
Huang 2006 | Adequate | Adequate | Adequate | Adequate | Y |