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Table 1 Risk of bias of included RCTs*

From: Effects and treatment methods of acupuncture and herbal medicine for premenstrual syndrome/premenstrual dysphoric disorder: systematic review

Study

Random sequence generation

Allocation concealment

Patient blinding

Assessor blinding

Incomplete outcome data

Selective outcome reporting

Chou (2008) [8]

L

U

U

U

L

L

Kim (2005) [9]

U

U

U

U

H

H

Habek (2002) [10]

U

U

U

U

U

U

Shin (2009) [11]

U

U

H

H

U

U

Xu (2006) [12]

U

U

U

U

U

U

Xu (2006) [13]

U

U

U

U

U

U

Guo (2004) [14]

U

U

U

U

U

U

Hong (2002) [15]

U

U

U

U

U

U

Yu (2006) [16]

L

L

U

U

U

U

Ma (2010) [17]

L

L

U

U

U

U

He (2009) [18]

U

U

U

U

U

U

Atmaca (2003) [19]

U

U

L

L

U

L

Zamani (2012) [20]

U

L

L

L

L

L

Canning (2010) [21]

U

L

L

L

U

L

Hicks (2004) [22]

U

L

L

L

U

L

Masumeh (2010) [23]

U

U

U

U

U

U

Agha-Hosseini (2008) [24]

L

L

L

L

L

L

  1. *Domains of quality assessment based on the Cochrane tools for assessing risk of bias.
  2. Abbreviations; L low risk of bias, H high risk of bias, U unclear (uncertain risk of bias).