Table 2 Distribution of subjects who converted and those who remained cognitively normal in different quartiles of Aβ1–42 and Aβ1–42/Aβ1–40 ratios.a
Aβ quartiles | Cognitively normal (n = 179) | MCI/AD (N = 24) |
|---|---|---|
Aβ1–42 quartiles (Q) | ||
Q1, ≤6 pg/mL | 41 (22.9) | 12 (50.0) |
Q2, 6.1–12 pg/mL | 44 (24.6) | 5 (20.8) |
Q3, 12.1–23 pg/mL | 48 (26.8) | 2 (8.3) |
Q4, >23 pg/mL | 46 (25.7) | 5 (20.8) |
Aβ,1–42/Aβ,1–40 ratios | ||
Q1, ≤0.04 | 48 (26.5) | 12 (50.0) |
Q2, 0.05–0.08 | 43 (23.8) | 6 (25.0) |
Q3, 0.09–0.15 | 47 (26.0) | 1 (4.2) |
Q4, >0.15 | 43 (23.8) | 5 (20.8) |