Table 1 Characteristic of the study sample
Epidemiological sample (n = 41)Clinical sample (n = 66)
Women (n (%))26 (63.4)32 (48.5)
Age at death (years) (mean (SD))86.6 (8.4)79.7 (9.2)
Ethnic group* (n (%))
    White/non-Hispanic8 (19.5)52 (78.8)
    Black/non-Hispanic14 (34.1)6 (9.1)
    Hispanic18 (43.9)7 (10.6)
    Other1 (2.4)
Education (years) (mean (SD))8.41 (5.55)14.9 (4.4)
APOEϵ4 genotype (n (%))
    −/−20 (48.8)43 (65.0)
    4/− or 4/410 (24.4)6 (9.1)
    Missing genotype information11 (26.8)17 (26.0)
Memory factor score at baseline (mean (SD))71.9 (48.6)54.6 (41.1)
Abstract/visuospatial factor score at baseline (mean (SD))45.2 (24.9)74.4 (29.1)
Language factor score at baseline (mean (SD))21.4 (6.7)25.0 (5.6)
Dementia diagnosis (n (%))27 (69.2)59 (89.4)
Braak stage (n (%))
    03 (7.7)3 (4.5)
    I17 (43.6)1 (1.5)
    II7 (17.9)2 (3.0)
    III2 (5.1)5 (7.6)
    IV5 (7.6)
    V3 (7.7)19 (28.8)
    VI7 (17.9)31 (47.0)
    Missing information2 (4.8)
  • Values are expressed as number (%) or mean (SD).

  • *Classified by self-report using the format of the 1990 US census.

  • APOE, apolipoprotein E.