The congruency of neuropsychological and F18-FDG brain PET/CT diagnostics of Alzheimer’s Disease (AD) in routine clinical practice: insights from a mixed neurological patient cohort

Table 4 Congruency of the neuropsychological diagnostics solely based on CERAD test results and the FDG-PET/CT diagnostics

	FDG-PET/CT Diagnosis
	AD	Non-AD
Neuro-psychological Diagnosis
AD	18	6	24
AD	Sensitivity: 56.3%
Non-AD	14	83	97
		Specificity: 93.3%
	32	89	121
			BA: 74.8%

Note. Cross-tabulation with respective number of cases (total n = 121), displays results of the test-based decision approach in which the neuropsychological diagnosis was based on the logistic regression analysis of performance on the CERAD test battery alone. Note that the total number of included cases is slightly lower than in the clinical decision approach shown in Table 3, as some patients could not sufficiently draw figures due to motor impairment and consequently these cases were not available for the logistic regression analysis. AD Alzheimer Disease, BA balanced accuracy

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