Table 4.

Comparison of interpersonal trait and vector length T-scores between different clinical stages in the AD group. A random coefficient model (univariate model) using SAS Proc Mixed was used to generate estimates of interpersonal trait and vector length T-scores at different clinical stages, adjusting for age and gender. Values are listed as estimates (standard error).

	Alzheimer’s Disease (AD)
	premorbid	CDR 0.5	CDR 1.0	CDR ≥2.0
	obs. = 63	obs. = 35	obs. = 56	obs. = 25
Dominance	47.9 (1.3)	35.6 (1.8)*	33.0 (1.5)*	26.9 (2.2)*†‡
Extraversion	51.5 (1.6)	42.6 (2.1)*	41.4 (1.7)*	37.3 (2.6)*
Warmth	52.3 (1.4)	49.9 (1.8)	49.3 (1.5)	48.5 (2.2)
Ingenuousness	51.1 (1.1)	51.0 (1.4)	51.3 (1.2)	51.3 (1.7)
Vector length	52.6 (1.5)	54.1 (2.0)	54.9 (1.6)	57.1 (2.4)

CDR 0.5 (very mild), 1.0 (mild), and ≥2 (moderate-to-severe disease stage); for other abbreviations see table 1.

^*p<.05 vs. premorbid;

^†p<.05 vs. CDR 0.5;

^‡p<.05 vs. CDR 1.0

Bold type signifies a score which fell more than 1.5 SD from the mean, i.e., scores below 35 or above 65.