Table 2.

Baseline Neuropsychological Characteristics and Dementia Risk Factors by Dementia Status at Last Follow-up.

Variable	Dementia free (N = 311)	Dementia (N = 113)	P-value*
Demographics
Age, years (Mean ± SD	78.9±3.1	79.7±3.0	0.02
Female, N (%)	193 (62%)	76 (67%)	0.36
Caucasian, N (%)	286 (92%)	101 (89%)	0.45
Education ≥ High School, N(%)	165 (53%)	49 (43%)	0.10
Parental Dementia, N( %)	56 (18%)	19 (17%)	0.83
Neuropsychological Tests, (Normal Range), Mean ± SD
BIMC (0–4)	2.1 ± 1.8	3.3 ± 2.4	<.0001
WAIS-PIQ (85–115)	105.7 ± 12.1	98.0 ±12.6	<.0001
WAIS-VIQ (85–115)	111.6 ± 15.3	104.1 ± 15.2	<.0001
Zung Depression scale (0–49)	45.7 ± 10.1	48.2 ± 11.0	0.13

^*For categorical variables, Chi Squared or Fischer’s exact test were used. For others, the Wilcoxon rank-sum test was used.

BIMC – Blessed Information Memory Concentration Test

WAIS-PIQ – Wechsler Adult Intelligence Scale – Estimated Performance IQ

WAIS-VIQ – Wechsler Adult Intelligence Scale – Estimated Verbal IQ