Table 1. Baseline Characteristics by MCI and Dementia Statusa.
| Characteristic | Patient group | ||
|---|---|---|---|
| No MCI or dementia (n = 63 255) | MCI (n = 21 085) | Dementia (n = 63 255) | |
| Age, mean (SD), y | 74.7 (10.3) | 74.7 (10.4) | 74.7 (10.3) |
| Age group, y | |||
| 50-64 | 12 692 (20.1) | 4228 (20.1) | 12 627 (20.0) |
| 65-79 | 26 483 (41.9) | 8825 (41.9) | 26 494 (41.9) |
| ≥80 | 24 080 (38.1) | 8032 (38.1) | 24 134 (38.2) |
| Female | 1961 (3.1) | 660 (3.1) | 1621 (2.6) |
| Race/ethnicity | |||
| Non-Hispanic White | 54 493 (86.1) | 18 152 (86.1) | 54 420 (86.0) |
| Non-Hispanic Black | 6646 (10.5) | 2222 (10.5) | 6984 (11.0) |
| Hispanic | 385 (0.6) | 134 (0.6) | 287 (0.5) |
| Other or unknown | 1731 (2.7) | 577 (2.7) | 1564 (2.5) |
| Live in area with >25% college educational level | 29 954 (47.4) | 9973 (47.3) | 30 386 (48.0) |
| Median annual income | |||
| <$41 721 | 18 230 (28.8) | 6089 (28.9) | 18 285 (28.9) |
| $41 721-$54 784 | 20 694 (32.7) | 6897 (32.7) | 20 731 (32.8) |
| >$54 784 | 24 331 (38.5) | 8099 (38.4) | 24 239 (38.3) |
| Charlson Comorbidity Index | |||
| Mean (SD) | 2.7 (2.5) | 2.7 (2.4) | 2.7 (2.4) |
| 0 | 13 056 (20.6) | 4355 (20.7) | 12 958 (20.5) |
| 1 | 11 514 (18.2) | 3834 (18.2) | 11 493 (18.2) |
| 2 | 11 403 (18.0) | 3795 (18.0) | 11 305 (17.9) |
| 3 | 8230 (13.0) | 2743 (13.0) | 8422 (13.3) |
| 4 | 6307 (10.0) | 2103 (10.0) | 6446 (10.2) |
| 5 | 4225 (6.7) | 1413 (6.7) | 4255 (6.7) |
| ≥6 | 8520 (13.5) | 2842 (13.5) | 8376 (13.2) |
Abbreviation: MCI, mild cognitive impairment.
a
Includes 147 595 patients. Patients with and without MCI and dementia were matched using propensity scores on demographic characteristics (age, sex, race/ethnicity, education, income) and Charlson Comorbidity Index. Differences between groups are not clinically meaningful. Unless otherwise indicated, data are expressed as number (percentage) of patients. Percentages have been rounded and may not total 100.