Fig. 5.

Receiver operating characteristic analysis of regression model between non-dementia controls and patients with mild cognitive impairment. After a ridge regression analysis of training data with the feature quantities of cerebral hemodynamic change related to two tasks as the explanatory variable and NDC = 0/MCI = 1 as the objective variable, the false positive rate on the horizontal axis and the true positive rate on the vertical axis was plotted. The result was AUC 0.977 and cut-off 0.417. AUC, area under the curve.