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Plasma Aβ42 levels in AD, DS, and controls
| Group | No. | Age in years Mean ± SD | Aβ42 (pg/ml) Mean ± SD |
|---|---|---|---|
| AD | 13 | 75 ± 9 | 25.8 ± 55.9 |
| Nondemented old controls | 25 | 71 ± 9 | 5.9 ± 5.1 |
| DS | 25 | 46 ± 9 | 81.5 ± 81.6 |
| Nondemented young controls | 25 | 45 ± 7 | 13.8 ± 19.1 |
Compared with nondemented old controls; p < 0.0.5. Compared with nondemented young controls; p < 0.01.
