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Table 1 The results of quality assessment according to QUADAS 2 for the included studies

From: Feasibility and diagnostic performance of dual-tracer-guided sentinel lymph node biopsy in cT1-2N0M0 gastric cancer: a systematic review and meta-analysis of diagnostic studies

Study id Risk of bias Applicability concerns
  Patient selection Index test Reference standard Flow and timing Patient selection Index test Reference standard
Ayako Shimada2016 1 1 1 1 1 1 1
Masahiro Niihara2016 1 1 1 1 1 1 1
Young Joon Lee2015 1 1 1 1 1 1 1
Satoshi Kamiya2015 1 1 1 1 1 1 1
Shuhei Mayanagi2014 2 2 ? ? 1 ? ?
Yuko Kitagawa2013 1 1 1 1 1 1 1
Ju-Hee Lee2013 1 1 ? ? 1 1 ?
Do Joong Park2011 1 1 1 1 1 1 1
Hiroya Takeuchi2011 1 2 ? ? 1 ? ?
Takashi Ichikura2009 1 1 1 1 1 1 1
Jun Ho Lee 3rd trial 2009 1 2 1 1 1 1 1
Young-Joon Lee2008 pick up 1 1 ? 2 1 1 ?
Young-Joon Lee2008 basin 1 1 ? ? 1 1 ?
Jun Ho Lee2006 1 1 1 1 1 1 1
Yoshiro Saikawa2006 1 2 ? ? 1 1 ?
Hitoshi Tonouchi2005 1 1 1 1 1 1 1
Tomoaki Karube2004 1 1 1 1 1 1 1
Hideki Hayashi2003 1 1 1 1 1 1 1
Hitoshi Tonouchi2003 2 1 1 1 1 1 1
  1. 1 low, 2 high, ? unclear