Table 3

Summary of QUADAS2 risk of bias assessment for included studies on assessment of persistent symptoms following SRC.

Study Risk of bias Applicability concerns
Patient selection Index test Reference standard Flow and timing Patient selection Index Reference standard
Kozlokski et al (2013)26 MediumMediumLowLowMediumMediumMedium
Leddy et al (2015)12 MediumMediumLowLowMediumMediumMedium
Clausen et al (2016)22 MediumHighLowHighMediumMediumMedium
Ellis et al (2015)27 MediumMediumLowLowMediumMediumMedium
Heyer et al (2016)13 HighMediumLowLowMediumMediumMedium
Gosselin et al (2012)28 MediumMediumLowHighHighHighLow
Chen et al (2007)14 MediumMediumLowMediumMediumMediumMedium
Chen et al (2008)29 MediumMediumMediumLowMediumMediumMedium
Chen et al (2008)30 MediumMediumMediumMediumMediumMediumMedium
Keightley et al (2014)31 MediumMediumLowLowLowLowLow
Bartnik-Olson et al (2014)32 MediumMediumLowMediumLowLowLow
  • SRC, sport-related concussion.