Table 5.
Sample Characteristics for Persons According to the Presence or Absence of Dementia
| Variable | No Dementia (n = 494) | Dementia (n = 81) | P Value |
|---|---|---|---|
| Age, mean (SD), y | 79.5 (5.9) | 81.8 (5.4) | <.001 |
| Education, mean (SD), y | 13.1 (3.6) | 11.8 (4.3) | .006 |
| WMHV, mean (SD) | −5.22 (1.08) | −4.50 (0.93) | <.001 |
| TBV, mean (SD) | 74.65 (4.4) | 71.97 (5.3) | <.001 |
| Male sex, No. (%) | 213 (43.1) | 34 (42.0) | .98 |
| African American, No. (%) | 280 (56.7) | 55 (67.9) | .02 |
| 1 Infarct, No. (%) | 93 (18.8) | 14 (17.3) | NA |
| >1 Infarct, No. (%) | 37 (7.5) | 11 (13.5) | .18a |
Abbreviations: NA, not applicable; TBV, total brain volume (TBV = total brain parenchymal volume/total cranial volume); WMHV, white matter hyperintensity volume (WMHV = natural log [white matter hyperintensity volume/total cranial volume]).
a
Based on group by number of infarcts (0, 1, or >1); χ2 association test.