Table 2.
Description of the Analyzed Population by Dependence Level.
| Independent, n = 8822 | Needs Assistance With Complex Tasks, n = 3469 | Needs Assistance With Basic Tasks, n = 1675 | Dependent, n = 556 | Unknown, n = 114 | P valuea,b | |
|---|---|---|---|---|---|---|
| Age, mean (SD) | 73.31 (9.95) | 74.93 (9.93) | 76.59 (10.68) | 76.82 (10.61) | 76.32 (10.17) | <.001 |
| Years education, mean (SD) | 15.12 (3.27) | 14.16 (3.66) | 13.75 (3.87) | 13.56 (4.00) | 15.89 (3.57) | <.001 |
| % Female | 59.79% | 51.77% | 54.87% | 53.78% | 49.12% | <.001 |
| % Institutionalizedc | 0.53% | 4.06% | 13.37% | 29.68% | 3.16% | <.001 |
| % Cognitively normal | 57.97% | 3.43% | 2.45% | 0.72% | 23.68% | <.001 |
| % Diagnosed ADd | 11.46% | 65.38% | 72.96% | 73.20% | 27.19% | <.001 |
| Mean CDR mean (SD) | 0.24 (0.31) | 0.85 (0.47) | 1.45 (0.75) | 2.33 (0.80) | 0.75 (0.73) | <.001 |
| Mean MMSE mean (SD) | 27.79 (2.95) | 22.46 (5.38) | 17.72 (7.08) | 9.79 (8.41) | 22.84 (7.17) | <.001 |
| Mean MMSEe with follow up mean (SD) | 27.78 (2.98) | 22.45 (5.41) | 17.71 (7.08) | 9.67 (8.42) | 22.82 (7.13) | <.001 |
| Mean FAQ mean (SD) | 0.21 (0.45) | 1.36 (0.79) | 2.20 (0.76) | 2.75 (0.47) | 1.20 (0.99) | <.001 |
| Mean NPI-Q mean (SD) | 1.51 (2.80) | 4.47 (4.43) | 6.25 (5.36) | 7.95 (5.80) | 5.43 (5.93) | <.001 |
Abbreviations: AD, Alzheimer’s disease; MMSE, Mini-Mental State Examination; CDR, clinical dementia rating scale; FAQ, functional activities questionnaire; NPI-Q, neuropsychiatric inventory questionnaire; SD, standard deviation.
a Proportions were tested using the Pearson chi-square test.
b Means were tested using analysis of variance.
c Institutionalized includes assisted living/boarding home/adult family home, and skilled nursing facility/nursing home.
d Diagnosed AD includes possible and probable AD.
e Normal MMSE scale, not reversed.