Specificity of transcranial sonography in parkinson spectrum disorders in comparison to degenerative cognitive syndromes

Table 1 Diagnostic accuracy of TCS for PD

Accuracy	Cut-off value (cm²)	Parkinson spectrum disorders					Cognitive disorders		Control n = 71
		PD n = 71	ET n = 58	APS n = 3	HDP n = 3	SP n = 23	MCI n = 33	D n = 13
Se (%)	0.20	94.3	N/A	N/A	N/A	N/A	N/A	N/A	N/A
	0.26	90	N/A	N/A	N/A	N/A	N/A	N/A	N/A
Sp (%)	0.20	N/A	55.2	0	33.3	34.8	89.7	75	83.3
	0.26	N/A	82.8	33.3	66.7	69.6	93.1	91.7	95.8

Abbreviations: N/A not applicable, TCS transcranial sonography, Se sensitivity, Sp specificity, PD Parkinson's disease, ET essential tremor, APS atypical parkinsonian syndromes, HDP hereditary degenerative parkinsonism, SP secondary parkinsonism, MCI mild cognitive impairment, D dementia

ISSN: 1471-2377