Table 3.
Baseline descriptive characteristics of the sample by dementia status.
| All^ | No dementia during follow-up | Incident dementia | p | |
|---|---|---|---|---|
| Sample Size: #, % | 1,097 | 973, 88.7% | 124, 11.3% | |
| Age at baseline: M (SD) | 78.6 (5.4) | 78.2 (5.3) | 81.0 (5.2) | <0.0001 |
| Sex: #, % Female | 684, 62.4% | 604, 62.1% | 80, 64.5% | 0.597 |
| Education: M (SD) | 13.7 (3.5) | 13.8 (3.5) | 13.1 (3.6) | 0.046 |
| Race/Ethnicity: | ||||
| #, % non-Hispanic White | 775, 70.6% | 692, 71.1% | 83, 66.9% | 0.335 |
| #, % non-Hispanic Black | 322, 29.4% | 281, 28.9% | 41, 33.1% | |
| GDS score+: M (SD) | 2.2 (2.3) | 2.2 (2.3) | 2.5 (2.4) | 0.089 |
| Any self-reported SCC: % | 91.3% | 91.4% | 91.1% | 0.929 |
| MCI status: #, % | ||||
| Jak/Bondi with no SCC | 422, 38.5% | 334, 34.3% | 88, 71.0% | <0.0001 |
| Jak/Bondi + any self-reported SCC | 375, 34.2% | 296, 30.4% | 79, 63.7% | <0.0001 |
| Jak/Bondi + high avg. self-reported SCC | 162, 14.8% | 114, 11.7% | 48, 38.7% | <0.0001 |
| Petersen with no SCC | 555, 50.6% | 452, 46.5% | 103, 83.1% | <0.0001 |
| Petersen + any self-reported SCC | 494, 45.0% | 402, 41.3% | 92, 74.2% | <0.0001 |
| Petersen + high avg. self-reported SCC | 209, 19.1% | 154, 15.8% | 55, 44.4% | <0.0001 |
| Follow-up time, years: Median (IQR) | 3.2 (2.0–6.2) | 3.3 (2.0–6.3) | 3.1 (1.7–6.1) | 0.456 |
^
Participants free of prevalent dementia at baseline who had at least one follow-up evaluation and completed neuropsychological tests and self-reported SCC at enrollment.
+
excluding the memory item from the short form of the GDS.