Figure 1

Probability of a normal control to be categorized as abnormal according to the criteria of asymptomatic neurocognitive impairment (ANI) and minor neurocognitive disorder (MND) if five cognitive domains are tested. Defined as impairment in functioning, involving at least two ability domains, documented by performance of at least 1.0 SD below the mean for norms in one test per domain (blue solid line), in two tests per domain (blue dotted line) or of at least 1.5 SD below mean for norms in one test per domain (red line). The probability is plotted as a function of the degree of correlation between test results of different cognitive domains with using 0.8 as correlation between tests in the same domain.