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Table 2 Quality assessment of included studies

From: Malalignment and malposition of quadriceps-sparing approach in primary total knee arthroplasty: a systematic review and meta-analysis

Study/year Study design Tool Quality score
Chiang 2012 RCT a 7
Yang 2010 RCT a 7
Karpman 2009 RCT a 7
Kim 2007 RCT a 4
Chin 2007 RCT a 7
Huang 2016 Retrospective b 7
Qi 2016 Retrospective b 7
Shen 2007 Retrospective b 8
Huang 2007 Retrospective b 7
King 2007 Retrospective b 8
Tashiro 2007 Retrospective b 7
Chen 2006 Retrospective b 7
Kim 2006 Retrospective b 8
  1. aCochrane risk of bias tool
  2. bModified Newcastle-Ottawa Scale