(b)  

Year 1
	PD DAT n = 29  IBZM n = 29		MSA DAT n = 8  IBZM n = 8		PSP DAT n = 12  IBZM n = 10		Mann-Whitney U test
	Mean	95% CI	Mean	95% CI	Mean	95% CI	PD versus MSA	PD versus PSP	MSA versus PSP
							P	P	P
Caudate DAT	2.96	2.70–3.22	3.58	3.13–4.02	2.78	2.43–3.13	0.024	ns	0.007
Putamen DAT	2.28	2.13–2.43	2.56	2.25–2.87	2.17	1.89–2.46	(0.060)	ns	0.025
Striate DAT	2.59	2.40–2.79	3.02	2.67–3.38	2.45	2.15–2.76	0.029	ns	0.014
Striate IBZM	1.73	1.67–1.78	1.88	1.71–2.05	1.64	1.49–1.78	(0.051)	ns	0.026