Table 5.

Relationship between Aβ40, Aβ42, and t-Tau within each age group.

Age group	Aβ40 vs. t-Tau	Aβ42 vs. t-Tau	Aβ40 vs. Aβ42
20–29	ρ = −0.087	ρ = −0.308	ρ = −0.126
	p = 0.7074	p = 0.07074	p = 0.5875
	n = 21	n = 21	n = 21
30–39	ρ = 0.076	ρ = 0.282	ρ = −0.562
	p = 0.7783	p = 0.2893	p = 0.0235
	n = 16	n = 16	n = 16
40–49	ρ = −0.582	ρ = 0.444	ρ = −0.321
	p = 0.0228	p =0.0745	p = 0.2427
	n = 15	n = 17	n = 15
50–59	ρ = −0.445	ρ = 0.474	ρ = −0.261
	p < 0.0001	p < 0.0001	p = 0.0142
	n = 88	n = 93	n = 88
60–69	ρ = −0.458	ρ = 0.341	ρ = −0.303
	p < 0.0001	p < 0.0001	p = 0.0004
	n = 132	n = 135	n = 132
70–79	ρ = −0.293	ρ = 0.249	ρ = −0.116
	p = 0.0113	p = 0.0292	p = 0.3235
	n = 74	n = 77	n = 74
80–91	ρ = −0.252	ρ = 0.459	ρ = −0.120
	p = 0.1634	p = 0.0083	p = 0.5147
	n = 32	n = 32	n = 32