Figure 1. Prevalence of Learning Disabilities (LDs) in Patients With Amnestic Alzheimer Disease (AD), Logopenic Variant Primary Progressive Aphasia (lvPPA), and Posterior Cortical Atrophy (PCA).

Data shown are for 100 patients with amnestic AD, 84 with lvPPA, and 95 with PCA. A, Comparisons across all cohorts revealed statistically significant differences in the prevalence of all LDs (amnestic AD vs lvPPA vs PCA, P < .001). The dashed line indicates the 10.0% estimated rate of all LDs in the general population. B, Comparisons across all cohorts revealed statistically significant differences in the prevalence of mathematical and/or visuospatial LDs (amnestic AD vs lvPPA vs PCA, P < .001). The dashed line indicates the 6.0% estimated rate of mathematical and/or visuospatial LDs in the general population.

^aP < .001, post hoc pairwise comparisons of all LDs between amnestic AD and lvPPA.

^bP < .001, post hoc pairwise comparisons of all LDs between amnestic AD and PCA.

^cP = .02, observed vs expected rates of all LDs.

^dP < .001, observed vs expected rates of all LDs.

^eP = .007, observed vs expected rates of mathematical and/or visuospatial LDs.

^fP < .001, post hoc pairwise comparisons of mathematical and/or visuospatial LDs between amnestic AD and PCA.

^gP = .006, post hoc pairwise comparisons of mathematical and/or visuospatial LDs between lvPPA and PCA.

^hP = .003, observed vs expected rates of mathematical and/or visuospatial LDs.