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Table 3 Cochrane’s risk of bias assessment

From: Effect of acustimulation on nausea and vomiting and on hyperemesis in pregnancy: a systematic review of Western and Chinese literature

1st author (Year)

Random sequence generation

Allocation concealment

Blinding of participants and personnel

Blinding of outcome assessment

Incomplete outcome data

Selective outcome reporting

Other sources of bias

Acupressure finger

       

Dundee 1988

High

Unclear

High

Low

High

Low

Unclear

Belluomini 1994

Low

Unclear

Low

Low

High

High

Low

Shin2007

Low

Unclear

Low

Low

Low

Low

Low

Rad 2012

Unclear

Unclear

Low

Low

Low

Unclear

Low

Jiang 2012

Unclear

Unclear

High

Low

Low

Unclear

unclear

Acupressure band

       

O’Brien 1996

Low

Low

Low

Low

Low

Unclear

Low

Norheim 2001

Low

Unclear

Low

Low

Low

Unclear

Low

Steele 2001

Low

Low

Low

Low

Low

Unclear

Low

Werntoft 2001

Unclear

Unclear

Unclear

Unclear

Unclear

Low

Unclear

Heazell 2006

Unclear

Unclear

Low

Low

Low

Low

Unclear

Jamigorn 2007

Low

Low

Low

Low

Low

Unclear

Unclear

Can Gurkan 2008

Unclear

Unclear

Low

Low

Low

Unclear

Low

Saberi 2013

Low

Unclear

High

Low

Low

Low

Low

Acupuncture

       

Knight 2001

Low

Low

Low

Low

Low

Low

Low

Smith 2002

Low

Low

Low

Low

High

Unclear

Unclear

Neri 2005

Low

Unclear

High

Unclear

Low

Unclear

Unclear

Zhang 2005

Low

Unclear

High

Low

Low

Low

Low

Liu 2007

High

Unclear

High

Low

Low

Low

Unclear

Wang 2008

Low

Unclear

High

Low

Low

Low

Unclear

Mao 2009

Low

Unclear

High

Low

Low

Low

Low

Liu 2011

Low

Unclear

High

Low

Low

High

Unclear

Ma 2013

Unclear

Unclear

High

Unclear

Low

High

Unclear

Auricular acupressure

       

Ou 2001

Low

Unclear

High

Low

Low

Low

Low

Puangsricharern 2008

Low

Unclear

High

Low

Low

Low

Unclear

Li 2010

High

Unclear

High

Low

Low

Low

Low

Liu 2012

Unclear

Unclear

High

Unclear

High

High

Unclear

Moxa

       

Fan 1995

Unclear

Unclear

High

Unclear

Low

Low

Unclear

Xu 2009

Unclear

Unclear

High

Low

Low

Low

Unclear

Lu 2012

Unclear

Unclear

High

Low

Low

Unclear

Unclear

  1. Higgins JPT, Green S (editors). Cochrane Handbook for Systematic Reviews of Interventions Version 5.1.0 (Updated March 2011). The Cochrane Collaboration, 2011. Available from www.cochrane-handbook.org