Table 6.
Demographic characteristics and mean performance on memory measures among CU stable and converter participants.
| CU Stable M (SD) (n = 450) | CU Converter M (SD) (n = 150) | p-value | |
|---|---|---|---|
| Age Mean (SD) | 75.437 (10.345) | 75.502 (10.493) | 0.947 |
| Education Mean (SD) | 14.171 (2.528) | 13.940 (2.499) | 0.331 |
| Sex (% Male) | 240 (53.3%) | 80 (53.3%) | 1.00 |
| Time to conversion (years) | - | 2.723 (1.517) | |
| Total follow up (years) | 3.664 (1.691) | 3.848 (1.801) | 0.257 |
| Short Test of Mental Status1 | 35.563 (1.980) | 33.624 (2.431) | < 0.001 |
| AVLT 30 MOANS SS1 | 10.282 (2.771) | 8.245 (2.918) | < 0.001 |
| Prior AVLT exposure (%) | 56.5% | 58.5% | 0.676 |
| Learning/Working Memory Composite (z-score) | 0.014 (0.974) | −0.552 (0.873) | < 0.001 |
| Learning/Working Memory Composite | < 0.001 | ||
| Normal z > −1 | 396 (88.4%) | 113 (75.3%) | |
| sOBJ z ≤ −1 | 52 (11.6%) | 37 (24.7%) | |
| AVLT 30 minute delay1 | < 0.001 | ||
| Normal SS > 7 | 382 (86.0%) | 91 (61.9%) | |
| sOBJ SS ≤ 7 | 62 (14.0%) | 56 (38.1%) | |
Note.P-values represent linear model ANOVAs for mean comparisons or Pearson’s Chi-squared test for frequency comparisons. MOANS = Mayo’s Older Americans Normative Studies; SS = scaled score; sOBJ = objective subtle cognitive impairment.
1
Performance is considered as part of consensus diagnosis.