highly significantp < 0.0001
For pTau181, we observed highly significant effect modification by amyloid status (interaction β = 0.65, p < 0.0001).
For pTau181, we observed highly significant effect modification by amyloid status (interaction β = 0.65, p < 0.0001).
While the A + group showed a numerically stronger Aβ1–42 effect, the interaction term did not reach statistical significance ( p = 0.10), and both groups showed the same negative direction.