Table 4. Baseline Characteristics of Participants Who Developed MCI vs Those Who Did Not.
| Characteristica | Did Not Develop MCI | Developed MCI | P Value |
|---|---|---|---|
| Age, mean (SD), y | 78.1 (7.3) | 81.6 (6.5) | <.001 |
| Female sex, % | 76.8 | 75.4 | .69 |
| Race, white, non-Hispanic, % | 89.4 | 92.6 | .14 |
| Education, mean (SD), y | 14.5 (3.0) | 14.7 (3.2) | .38 |
| Purpose in life score, mean (SD) | 3.7 (0.5) | 3.6 (0.4) | .002 |
| Depressive symptoms score, mean (SD) | 1.1 (1.7) | 1.4 (1.9) | .04 |
| Neuroticism score, mean (SD) | 14.3 (7.2) | 15.1 (6.4) | .12 |
| Social network size, mean (SD) | 7.0 (6.3) | 6.6 (6.1) | .25 |
| No. of medical conditions, mean (SD) | 1.4 (1.1) | 1.2 (1.0) | .10 |
| MMSE score, mean (SD) | 28.7 (1.4) | 28.2 (1.8) | <.001 |
Abbreviations: MCI, mild cognitive impairment; MMSE, Mini-Mental State Examination.
a
Statistical significance is based on t tests, Wilcoxon rank sum tests or χ2 tests, as appropriate.