Negative predictive value, sensitivity, and specificity Negative predictive value, sensitivity, and specificity for 30-day myocardial infarction or death by baseline high-sensitivity cardiac troponin I (Siemens) concentrations below certain cut-offs (0–20 ng/L) in the derivation and validation cohort. Dashed line at 99.5% for NPV plots, 97% for sensitivity plots and 50% for specificity plots. hs-cTnI, high-sensitivity cardiac troponin I; MI, myocardial infarction; NPV, negative predictive value.