Table 1.

Descriptive statistics

Variable	Mean [or N (%)]	SD	Minimum	Maximum
Age, yr.	66.53	14.89	22.4	94.7
Education, yr.	17.07	2.37	8	21
Sex (Women)	362 (46.1%)	-	0	1
Black	193 (24.5%)	-	0	1
White	532 (67.7%)	-	0	1
Other race	61 (7.8%)	-	0	1
GFAP	165.39	101.57	31.59	1621.35
GFAP-Winsorized	163.69	86.67	31.59	521.89
NfL	21.26	12.25	2.98	112.43
NfL-Winsorized	21.11	11.57	2.98	59.76
Neuroticism	45.13	9.19	17	78
Extraversion	51.34	10.04	19	82
Openness	53.55	10.59	20	85
Agreeableness	52.57	9.89	9	79
Conscientiousness	52.99	10.00	11	81

N = 786. Age and education are in years. Personality traits are in T-scores, which are simple linear transformation based on combined gender norms that have a mean of 50 and SD of 10, see NEO-PI-R manual (Costa and McCrae, 1992).