Study

Sensitivity

Specificity

PPV

NPV

Dulchavsky et al. [16]

95%

100%

100%

Knudtson et al. [19]

92%

99.7%

92%

99.7%

Lichtenstein et al. [5]

100%

78%

Sartori et al. [11]

87.5%

100%

100%

99.6%

Lichtenstein et al. [14]

95.3%

91.1%

100%

This study

100%

94%

94%

100%