SLC6A3 and supranuclear palsy, progressive, 1: In the PSP-RS group, higher MDS UPDRSIII scores (β = 0.401, P < 0.001), higher GDS scores (β = 0.274, P < 0.01), lower MMSE scores (β = −0.227, P < 0.05), and lower DAT binding in the caudate (β = −0.222, P < 0.05) were associated with higher PSPrs total scores.