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Table 2 The methodological quality of included studies based on the Cochrane handbook

From: Efficacy and safety of Suanzaoren decoction for primary insomnia: a systematic review of randomized controlled trials

 

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]

?

-

-

-

-

+

-

-

  1. 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.