| A | B | C | D | E | F | G | H |
---|
WU2005[31] | ? | - | - | - | - | + | + | - |
Yu 2005[32] | + | - | - | - | - | + | ? | + |
Tan 2006[35] | ? | - | - | - | - | + | - | - |
Yu 2006[36] | ? | - | - | - | - | - | + | - |
Wu 2008[42] | ? | - | + | - | - | + | ? | - |
She2009[37] | + | - | - | - | - | + | ? | + |
Yuan2009[38] | + | - | - | - | - | + | ? | + |
Luo 2009[34] | ? | - | - | - | - | + | ? | - |
Zou 2011[40] | ? | - | - | - | - | + | - | - |
Cong 2011[41] | ? | - | - | - | - | + | + | - |
Feng 2011[39] | ? | - | - | - | - | + | ? | - |
Liu 2012[33] | ? | - | - | - | - | + | - | - |
- A: Adequate sequence generation; B: Concealment of allocation; C: Blinding (patient); D: Blinding(investigator); E: Blinding(assessor); F: Incomplete outcome data addressed (ITT analysis); G:Free of selective reporting; H: other potential thereat to validity. +: Yes, -: No, ?: Unclear.