Table 2.
LBLS participant characteristics.
| Year of testing | ||||
|---|---|---|---|---|
| Measure | Baseline | Year 3 | Year 6 | Year 9 |
| (n = 561) | (n = 292) | (n = 144) | (n = 101) | |
| Retention from previous testing (%) | 52.0 | 49.3 | 70.1 | |
| Age [M (SD)] | 73.7 (9.2) | 75.4 (8.7) | 75.1 (8.0) | 76.1 (7.1) |
| Education [M (SD)] | 13.7 (3.0) | 13.9 (2.8) | 14.2 (2.7) | 14.2 (2.7) |
| Sex, female [n (%)] | 285 (51) | 146 (50) | 70 (49) | 51 (51) |
| Reasoning [M (SD)] | 22.3 (11.7) | 23.9 (11.5) | 25.4 (11.6) | 25.2 (11.1) |
| Fluency [M (SD)] | 32.4 (11.6) | 33.7 (11.1) | 33.3 (13.3) | 34.4 (11.7) |
| Memory [M (SD)] | 11.4 (4.0) | 11.6 (4.3) | 11.6 (4.5) | 11.2 (4.6) |
| Semantic knowledge [M (SD)] | 38.5 (10.3) | 39.5 (9.6) | 40.7 (9.0) | 39.7 (9.8) |
| Cognitive activity [M (SD)] | 2.5 (1.3) | 2.8 (1.4) | 2.7 (1.3) | 2.6 (1.3) |
| Activity change [M (SD)] | — | 0.2 (1.3) | 0.2 (1.4) | −0.2 (1.3) |
M: mean; SD: standard deviation. The theoretical ranges for each measure with a defined upper limit are as follows: education = 0–20, reasoning = 0–30, memory = 0–20, semantic knowledge = 0–36, and cognitive activity = 0–6.