Characteristics of the studied sample compared with the NOMAS MRI subsample
| NOMAS MRI Study Included Sample (n = 706) | NOMAS MRI Study Excluded Sample (n = 585) | P Valuea | |
|---|---|---|---|
| Age (yr) | 71.6 ± 8.0 | 69.4 ± 9.9 | <.01 |
| Female sex (%) | 60.4 | 60.5 | .95 |
| Ethnicity (%) | |||
| Non-Hispanic white | 15.9 | 13.5 | <.01 |
| Non-Hispanic black | 20.3 | 13.7 | |
| Hispanic | 61.1 | 71.1 | |
| Hypertension (%) | 68.5 | 64.6 | .15 |
| Diabetes (%) | 18.9 | 20.0 | .61 |
| Hypercholesterolemia (%) | 56.6 | 63.2 | .02 |
| Current smoking (%) | 15.9 | 16.2 | .86 |
| Previous cardiac disease (%) | 16.3 | 16.9 | .77 |
| Carotid plaque (%) | 55.0 | 55.5 | .85 |
| Perivascular spaces score | |||
| Mean | 5.0 | Not applicable | Not applicable |
| Median | 4.0 | ||
| 25th percentile | 2.0 | ||
| 50th percentile | 4.0 | ||
| 75th percentile | 7.0 |
Note:—NOMAS indicates the Northern Manhattan Study.
↵a Two-tailed t test was used to obtain P values for age differences, while the χ2 test was used for all other comparisons.