Table 2. Risk of Bias Assessment of Included Studies
Article, YearRandom Sequence GenerationAllocation ConcealmentBlinding of Participants and PersonnelBlinding of Outcome AssessmentIncomplete Outcome DataSelective ReportingOther Bias
Barrow (2007)21LowHighHighHighLowLowUnclear
Blake (2009)22LowLowHighHighLowLowUnclear
Cai (2010)23LowHighHighHighLowLowUnclear
Caminiti (2011)24LowHighHighHighLowLowUnclear
Channer (1996)25LowHighHighHighLowLowUnclear
Chen (2006)26LowHighHighHighLowLowUnclear
Chen (2013)27LowHighHighHighLowLowUnclear
Chen (2013)28LowHighHighHighLowLowUnclear
Cheung (2005)29LowLowHighLowLowLowUnclear
Ding (2013)30LowHighHighHighLowLowUnclear
Gemmell (2006)31LowHighHighLowLowLowUnclear
Hart (2004)32LowHighHighHighLowLowUnclear
Lee (2003)33LowHighHighHighUnclearUnclearUnclear
Lee (2003)34LowLowHighHighUnclearUnclearUnclear
Lee (2004)35LowHighHighHighLowUnclearUnclear
Li (2012)36LowHighHighHighLowLowUnclear
Lin (2012)37LowHighHighHighLowLowUnclear
Luo (2006)38LowHighHighHighLowLowUnclear
Mao (2006)39LowHighHighHighLowLowUnclear
Ning (2010)40LowHighHighHighLowLowUnclear
Pan (2009)41LowLowHighHighLowLowUnclear
Sato (2010)42LowHighHighHighLowLowUnclear
Taylor‐Piliae (2012)43LowLowHighLowLowLowUnclear
Tsai (2003)44LowLowHighLowLowLowUnclear
Wang (1989)45LowHighHighHighLowLowUnclear
Wang (2010)46LowHighHighLowLowLowUnclear
Wang (2012)47LowHighHighHighUnclearLowUnclear
Wang (2013)48LowHighHighHighLowLowUnclear
Yao (2010)49LowHighHighHighLowLowUnclear
Yeh (2004)50LowLowHighLowLowUnclearUnclear
Yeh (2008)51LowHighHighHighUnclearUnclearUnclear
Yeh (2011)52LowLowHighLowLowUnclearUnclear
Yeh (2013)53LowLowHighLowLowUnclearUnclear
Yu (2013)54LowHighHighHighLowLowUnclear
Zhang (2013)55LowHighHighHighLowLowUnclear