Table 1. The mean and SE of the PC scores that were significantly different between age-groups Younger (Y), Middle-age (MA) and Older (O).

PC Number	Eigenvalue (%)	Score Younger	Score Middle-age	Score Older	P-values
PC 1	65.9	16.5 (8.1)	-9.4 (8.1)	-7.4 (8.3)	Y-MA p = 0.03 Y-O p = 0.04
PC 2	16.3	-0.2 (4.1)	-6.2 (4.1)	6.6 (4.2)	MA-O p = 0.03
PC 3	4.4	-6.0 (2.0)	3.5 (2.0)	2.6 (2.1)	Y-MA p<0.01 Y-O p<0.01
PC 4	3.5	2.4 (1.9)	-0.21 (1.9)	-2.2 (1.9)	Y-O p = 0.1
PC 5	2.5	2.3 1.5)	1.7 (1.5)	-0.52 (1.2)	Y-O p<0.01 MA-O p<0.01
PC 6	1.5	-1.6 (1.2)	2.1 1.2)	-0.52 (1.2)	Y-MA p = 0.04
PC 7	1.2	-1.3 (0.9)	1.3(1.2)	-0.06(1.3)