Table 3.

Results of cross-sectional and longitudinal analyses

		Temporal				Cingulate
		Aβ40		Aβ42		Aβ42
		r	p	r	P	r	p
Blessed DRS prior to death	Tris	−0.040	0.854	0.252	0 234	0.042	0.845
	Triton			0.485	0.016	−0.185	0.388
	SDS			0.439	0.032	0.168	0.432
	FA	−0.075	.728	−0.065	0.763	−0.189	0.376
Illness Duration	Tris	0.567	0.002	0.130	0.518	0.117	0.568
	Triton			0.286	0.149	−0.039	0.848
	SDS			−0.087	0.667	0.199	0.330
	FA	0.510	0.007	−0.097	0.629	0.004	0.986
		F	p	F	P	F	p
ApoE	Tris	5.154	0.014	0.226	0.799	0.508	0.608
	Triton			0.874	0.430	0.603	0.556
	SDS			1.272	0.299	0.087	0.917
	FA	9.343	0.001	1.695	0.205	0.278	0.760
		β	p	β	P	β	p
Rate of cognitive decline	Tris	−1.237	0.268	0.005	0.997	2.070	0.145
	Triton			1.750	0.200	−0.112	0.940
	SDS			3.506	<0.001	−2.747	0.011
	FA	−2.106	0.070	1.019	0.375	−2.477	0.020

All analyses reflect unadjusted models using raw data, except Blessed correlations which include time from last evaluation until death as a covariate. The reported β in the GEE analysis is that of the time × Aβ interaction term; positive values indicate a more rapid cognitive decline for subjects with measured Aβ in the upper median.