Figure 3. Receiver operating characteristic curves for the predictive utility of CSF biomarkers. (A) Receiver operating characteristic curves for predicting future cognitive impairment in cognitively normal controls over time (CN to MCI). (B) Receiver operating characteristic curves for predicting future cognitive impairment in MCI subjects over time (MCI to AD). Abbreviations: CSF: cerebrospinal fluid; Ng, neurogranin; Aβ, amyloid-β; p-tau, phosphorylated tau; t-tau, total tau.