Table 1. Relevant parameters of all groups investigated.

Disease	N	m/f	Age	Tau (pg/ml)	MMST	Hoehn&Yahr
PD	24	9/15	66±9	264±140	26±4	2.1±1.1
PDD	21	10/11	76±8	326±250	20±6	2.9±1.1
AD	9	5/4	70±13	786±427	23±4	–
FTLD	6	4/2	64±7	450±387	27±2	–
CON	24	9/15	70±06	–	–	–

Data are indicated as mean±SD.

Abbreviations: PD  =  Parkinson’s disease, PDD  =  Parkinson’s dementia, AD  =  Alzheimer’s disease, FTLD  =  frontotemporal lobar degeneration, CON  =  control persons, m/f  =  male/female, MMST  =  minimal mental status test.