Three-dimensional stereotactic surface projection in the statistical analysis of single photon emission computed tomography data for distinguishing between Alzheimer’s disease and depression

Figure 5 Scores for each factor for each type. Type A cases (true AD) had high factor scores for Factor 1 (tendency for AD); Type B cases (pseudo-dementia) had high factor scores for Factor 2 (tendency for pseudo-dementia); and Type D cases had high factor scores for Factor 3 (depressive tendency), thus validating the type determination method. Type C cases (occult AD) had high factor scores for Factors 1 and 3, suggesting that this type shows a strong tendency for AD while also presenting with a depressive tendency. AD: Alzheimer’s disease.