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Characteristics of an ideal biomarker
| Characteristic | Ideal |
|---|---|
| Sensitivity: % of patients correctly identified as having AD | >80%–85% |
| Specificity: % of patients correctly identified as not having AD. |
>80% |
| Positive predictive value: % of patients who are positive for biomarker and have definite AD pathology at autopsy |
>80% |
| Negative predictive value: % of patients who, at autopsy, prove not to have the disease |
>80% |
