Table 3 Risk of bias assessment*
From: Acupuncture for ankle sprain: systematic review and meta-analysis
Sun (2011)[24] | Zheng (2010)[25] | He (2010)[36] | Wei (2010)[37] | Ni (2010)[26] | Tang (2010)[38] | Luo (2009)[27] | Zhou (2008)[28] | He (2006)[29] | Zhao (2005)[30] | Wang (2005)[39] | Li (2002)[31] | Ge (2000)[32] | Yu (1999)[33] | Yu (1999)[34] | Yu (1996)[35] | Ruan (1995)[40] | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1. Was the method of randomization adequate? | Y | U | Y | U | U | U | U | U | U | U | U | Y | U | U | U | U | U |
2. Was the treatment allocation concealed? | Y | U | U | U | U | N | N | U | U | N | U | U | U | U | U | U | U |
3. Was the patient blinded to the intervention? | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N |
4. Was the outcome assessor blinded to the intervention? | U | U | N | U | U | U | N | U | U | N | U | U | U | U | U | U | U |
5. Were incomplete outcome data adequately addressed? | N | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y |
6. Are reports of the study free of suggestion of selective outcome reporting? | N | N | Y | N | N | N | Y | Y | N | Y | Y | Y | Y | Y | Y | Y | Y |