Table 1.
Characteristics of the study sample at baseline (n = 453)
| Variablesa | Total (n = 453) | Stable SCD (n = 84) | Unstable SCD (n = 195) | CON (n = 174) | P Value (group difference)b |
|---|---|---|---|---|---|
| Age, mean (SD) | 80.49 (4.21) | 81.65 (4.49) | 80.20 (4.07) | 80.01 (4.06) | <.05 |
| Gender, n (%) | |||||
| Male | 125 (27.6) | 24 (28.6) | 58 (29.7) | 43 (24.7) | |
| Female | 328 (72.7) | 60 (71.4) | 137 (70.3) | 131 (75.3) | .55 |
| Education, n (%) | |||||
| Low | 306 (67.7) | 59 (71.1) | 140 (71.8) | 107 (61.5) | |
| Middle | 92 (20.4) | 13 (15.7) | 35 (17.9) | 44 (25.3) | |
| High | 54 (11.9) | 11 (13.3) | 20 (10.3) | 23 (13.2) | .20 |
| Cognitive functioning/MMSE, mean (SD) | 28.14 (1.27) | 27.76 (1.19) | 28.19 (1.31) | 28.27 (1.23) | <.01 |
| Depressive symptoms/CES-D, mean (SD) | 13.55 (7.25) | 16.47 (7.17) | 13.64 (6.99) | 12.07 (7.20) | <.001 |
| Follow-up time, years, mean (SD) | 4.83 (2.22) | 4.01 (2.11) | 5.61 (1.90) | 4.37 (2.32) | <.001 |
Abbreviations: CES-D 20-item Center of Epidemiologic Studies Depression Scale, CON controls/individuals without SCD, MMSE Mini-Mental State Examination, SCD subjective cognitive decline
aMissing values, n(%): education = 1 (0.2 %); depressive symptoms: 28 (6.2 %); group statistic based on Kruskal-Wallis-tests for continuous variables and χ2 tests categorical variables
bStable SCD vs. unstable SCD vs. CON