All participants
	HC	MCI	AD	ANOVA	HC vs MCI	HC vs AD	MCI vs AD
PP	4.9	4.3	2.8	F(2,49) = 16.0	p = 0.1	p <0.001	p = 0.001
-0.9	-1.2	-0.8	p <0.001
PM	11.1	7.6	4.6	F(2,49) = 32.0	p <0.001	p <0.001	p = 0.004
-2.1	-2.7	-1.3	p <0.001
MCI participants
	HC	MCI-ve	MCI+ve	AD	ANOVA
PP	4.9	4.9	3.9	2.8	F(3,46) = 13.8
-0.9	-1.2	-0.9	-0.8	p <0.001
PM	11.1	9.6	5.8	4.6	F(3,46) = 34.3
-2.1	-1.6	-2.3	-1.3	p <0.001
Pairwise comparisons
	HC vs MCI-ve	HC vs MCI+ve	HC vs AD	MCIve- vs MCI+ve	MCI-ve vs AD	MCI+ve vs AD
PP	p = 1.0	p = 0.06	p <0.001	p = 0.2	p <0.001	p = 0.09
PM	p = 0.3	p <0.001	p <0.001	p = 0.002	p <0.001	p = 0.6