Table 1. Demography of study cohorts.
| BLSA (n = 722) | SardiNIA (n = 587) | |
|---|---|---|
| n/%/mean (SD) | n/%/mean (SD) | |
| Female | 48.1% | 62.2% |
| Age (years) | 74.88 (10.86) | 57.28 (13.24) |
| Education (years) | 17.68 (2.50) | 7.33 (3.96) |
| Big five personality traits | ||
| Neuroticism | 45.35 (8.25) | 55.46 (8.36) |
| Extraversion | 50.60 (10.10) | 46.80 (8.04) |
| Openness | 52.59 (10.55) | 44.35 (9.08) |
| Agreeableness | 51.88 (9.51) | 47.55 (8.55) |
| Conscientiousness | 51.91 (9.31) | 49.20 (8.79) |
| Measures of depressive symptoms | ||
| CES-D continuous | 5.47 (5.66) | 11.66 (7.79) |
| CES-D binary cutoff 16 | 6.6% | 23.8% |
| CES-D binary cutoff 20 | 2.6% | 13.9% |
BLSA, Baltimore Longitudinal Study of Aging; CES-D, Center for Epidemiologic Studies Depression Scale.