Table 1 Empirical specificity (PPV) of trigger tools
StudySettingType of eventMean PPV (%)
Barber et al, 200638UK secondary carePrescribing error1.6
Jha et al, 200146US hospital admissionsADE3.5
Jha et al, 199847US hospital staysADE10.5
Rozich et al, 200342US hospital staysADE18.8
Sharek et al, 200641US Neonatal ICUAE38.0