Table 2

Methodological quality of the included studies

CriterionBache and Cross7Moore6Lesho9Kazemi and Roscoe2Dissmann and Han8Wilder et al10
Consecutive or random sampleYesYesYesYesYesYes
Case–control study design avoidedYesYesYesYesYesYes
Inappropriate exclusions avoidedYesYesYesYesYesYes
Index test interpreted blind and independent of reference standard/prespecified thresholdUnclearYesYesYesYesUnclear
Appropriate reference standardYesYesYesYesYesYes
Reference standard interpreted blind and independent of index testUnclearUnclearUnclearYesYesUnclear
Appropriate interval between index test and reference standardNot reportedNot reportedWithin 30 daysNot reportedNot reportedNot reported
All patients received a reference standard/same reference standardYesYesNoYesYesNo
All patients included in the analysisYesYesNoYesYesNo