Table 2.
Frequencies and Estimated Population Characteristics for Cognitive Impairment without Dementia Subtypes*
| Cognitive Impairment without Dementia Subtype after Initial Assessment | Frequency, n (%) | Mean Age (SD), y | Mean Education (SD), y | Mean Mini-Mental State Examination Score (SD) | Men, % | Mean Dementia Severity Rating Scale Score (SD) |
|---|---|---|---|---|---|---|
| Prodromal Alzheimer disease | 94 (34.2) | 81.88 (5.94) | 10.97 (3.58) | 24.13 (3.44) | 53.8 | 4.86 (3.94) |
| Medical conditions | 55 (23.9) | 80.28 (5.96) | 10.51 (2.81) | 24.63 (2.77) | 26.5† | 7.08 (4.97) |
| Stroke | 34 (15.5) | 81.04 (5.41) | 11.78 (3.07) | 25.70 (3.45) | 55.5 | 6.25 (5.82) |
| Vascular cognitive impairment without dementia | 20 (10.1) | 78.63 (6.25) | 11.10 (3.39) | 25.80 (2.98) | 36.2 | 5.20 (4.61) |
| Depression and other psychiatric disorders | 10 (5.1) | 80.21 (3.59) | 11.21 (3.60) | 23.67 (1.25) | 14.6 | 7.98 (5.92) |
| Neurologic conditions | 10 (5.2) | 82.71 (6.71) | 8.59 (5.29) | 27.00 (2.89) | 72.2 | 8.08 (5.19) |
| Amnestic mild cognitive impairment | 4 (2.8) | 82.45 (12.52) | 12.59 (3.56) | 25.72 (0.93) | 45.8 | 12.08 (5.93) |
| Past or current alcohol abuse | 6 (1.7) | 76.89 (1.34) | 10.58 (2.78) | 25.37 (1.92) | 91.8 | 8.20 (2.89) |
| Low baseline intellect or presence of learning disorders | 8 (1.4) | 81.12 (4.66) | 3.06 (1.91) | 16.51 (2.64) | 37.2 | 2.52 (1.64) |
| Total | 241 (100) | 80.92 (5.90) | 10.81 (3.46) | 24.75 (3.27) | 44.9 | 6.17 (4.78) |
*
Values for n are unweighted. Means and percentages are weighted and are calculated within columns. Some subtypes are grouped together because of small sample sizes. Means or percentages are compared among the 4 most frequent cognitive impairment without dementia subtypes.
†
Persons in the medical conditions subgroup were more likely to be female (P = 0.004).