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Table 2 Risk of bias of the included studies

From: What intrinsic factors influence responsiveness to acupuncture in pain?: a review of pre-clinical studies that used responder analysis

Author (Year)

A

B

C

D

E

F

G

H

I

Total

Kim (2014)

√

 

√

 

√

  

√

√

5

Wang (2012)

√

√

√

 

√

√

√

√

√

8

Fais (2012)

√

√

  

√

√

 

√

√

6

Gao (2007)

√

√

  

√

  

√

 

4

Kim (2007)

√

 

√

 

√

√

√

√

√

7

Ko (2006)

√

 

√

 

√

√

   

4

Sekido (2003)

√

√

√

 

√

√

 

√

 

6

Lee (2002)

√

   

√

√

   

3

Liu (1999)

√

√

  

√

    

3

Tian (1998)

√

 

√

 

√

    

3

Tang (1997)

√

√

  

√

√

   

4

Takeshige (1993)

√

   

√

    

2

Takeshige (1992)

√

   

√

    

2

Han (1985)

√

   

√

    

2

  1. Studies fulfilling the criteria of: A: peer reviewed publication; B: detailed statement of acupuncture procedure; C: objective behavior test applied to classify responder or non-responder; D: blinded assessment of outcome E: statement of cut-off value for dividing responder or non-responder; F: notification of the ratio of responder or non-responder to the total; G: reproducibility of EA sensitiveness; H: compliance with animal welfare regulations; I: statement of potential conflict of interests