Table 1. Means and standard deviations for study variables by diagnosis.
| Normal (11.8%) |
MCI (44.6%) |
Alzheimer's (34.9%) |
Other dementia (8.7%) |
Total (100%) |
N (2512) |
|
|---|---|---|---|---|---|---|
| Age | 75.8 (9.55) | 76.4 (9.38) | 76.0 (9.12) | 70.3 (10.25) | 75.6 (9.53) | 2512 |
| Education | 15.4 (3.35) | 14.7 (3.65) | 14.3 (3.54) | 14.9 (3.26) | 14.7 (3.56) | 2497 |
| CDR Sum of Boxes | 0.88 (0.66) | 1.3 (0.92) | 2.8 (1.25) | 2.5 (1.19) | 1.9 (1.30) | 2512 |
| MMSE | 28.7 (1.41) | 27.0 (2.68) | 24.0 (4.13) | 24.1 (5.36) | 25.9 (3.85) | 2462 |
| GDS | 1.5 (1.90) | 1.8 (1.92) | 2.4 (2.44) | 3.7 (3.42) | 2.1 (2.34) | 2408 |
| Apathy (%) | 18 | 19 | 41 | 74 | 31 | 2361 |
| Acetylcholinesterase Inhibitors Use (%) | 9 | 24 | 55 | 42 | 35 | 2512 |
| Memantine Use (%) | 2 | 6 | 23 | 20 | 13 | 2512 |
| Depression in last 2 years (%) | 19 | 20 | 36 | 47 | 28 | 2512 |
| Hispanic or Latino (%) | 9 | 7 | 7 | 4 | 7 | 2512 |
| White, non-Hispanic (%) | 79 | 78 | 80 | 86 | 79 | 2512 |
| Black, non-Hispanic (%) | 10 | 13 | 10 | 7 | 11 | 2512 |
| Male sex (%) | 50 | 50 | 47 | 60 | 50 | 2512 |
| Married (%) | 65 | 63 | 67 | 78 | 66 | 2500 |
| Evaluated in year(s) prior to UDS (%) | 64 | 53 | 47 | 42 | 51 | 2512 |
| Referred by clinic or clinician (%) | 25 | 36 | 49 | 58 | 41 | 2512 |
Mean (S.D.); *The means of these variables equal the proportion of cases coded as present. MCI = Mild Cognitive Impairment; CDR = Clinical Dementia Rating; MMSE = Mini-Mental State Examination; GDS = Geriatric Depression Scale; UDS = Uniform Data Set.