SLC6A3 and Lewy body dementia: A significantly lower SBR in the MDQVR+ group (1.1 ± 0.5) than that in the MDQVR– group (1.7 ± 0.4) and a high correlation coefficient of MDQVR with SBR (−0.65) indicated a good correlation of the questionnaire with reducing DAT uptake in striatal areas, which is currently the hallmark of brain imaging study for the diagnosis of DLB.