Using the data recorded at the first visit, we retrospectively tested the validity of the criteria recently proposed by the Consortium on Dementia with Lewy Bodies for the diagnosis of DLB.1 For this set of criteria, probable diagnosis of DLB requires progressive cognitive decline and the presence of 2 of the following features: fluctuating cognition, recurrent visual hallucinations, or parkinsonism, while suspicion of DLB requires the presence of only 1 of these features.1 Both the possible DLB criteria (median sensitivity, 35.7%, range, 14.3%-42.9%; PPV, median, 13.7%, range, 8.7%-14.3%); and the probable DLB criteria (sensitivity, 17.9%, range, 0%-28.6%; PPV, median, 50%, range, 0%-50%) were suboptimal (very low sensitivity and PPV). To test this set of criteria, we used frontal lobe–type cognitive impairment as the essential feature representing cognitive impairment. The validity of the criteria hardly improved when early cortical and frontal lobe–type cognitive impairment were included (possible DLB: median, 39.3%; range, 21.4%-42.9%, and PPV, median, 13.1%; range, 10.7%-15.0%; probable DLB: sensitivity, 21.4%; range, 0%-28.6%, and PPV, median, 50%; range, 0%-60%). The accuracy of this set of criteria might have improved if our cases were specifically presented or analyzed using this information. However, a previous validity study of 2 similar criteria for DLB38 achieved low sensitivity (15%-17%), which supports our results. While our study supports the inclusion of hallucinations and the absence of gait or balance disturbances for the diagnosis of DLB, further work is needed to determine which combination of features will improve the diagnostic accuracy in clinical practice.