CBS and Alzheimer disease: Individuals with CBS with positive Aβ or FTP PET results had CL values comparable to those with AD (mean [SD] CBS-Aβ+, 75 [49] CL; CBS-Aβ−, 1 [11] CL; P < .001; CBS-FTP+, 81 [50] CL; CBS-FTP−, 4 [15] CL; P < .001) (Figure 1D), whereas individuals with PSP-RS with visually positive Aβ PET results showed only marginal CL increases relative to individuals with PSP-RS with negative PET results (mean [SD] PSP-Aβ+, 37 [16] CL; PSP-Aβ−, 8 [14] CL; P < .001), and no difference was seen for individuals with nfvPPA (mean [SD] nfvPPA-Aβ+, 13 [8] CL; nfvPPA-Aβ−, 6 [14] CL; P = .24).