While in the PSP-non-RS group, higher FBI scores (β = 0.369, P < 0.01), higher MDS UPDRSIII scores (β = 0.333, P < 0.01) and lower DAT binding in the caudate (β = −0.267, P < 0.05) were related to higher PSPrs total scores (Supplementary Table 5). Here, SLC6A3 is linked to supranuclear palsy, progressive, 1.