alt Hacker NewsThere could be an interaction with the diet though. For example, what if the nutrient in eggs that prevents Alzheimer's is something that also occurs in meat?
Also, it seems likely that among this population many of those who don't or rarely consume eggs are vegan or almost vegan, so it might be more accurate to say that veganism is correlated with Alzheimer's.
1. They ran a sensitivity analysis that removed vegans yet still got the same result, so the egg gradient is still there among non-vegans.
2. They modeled swapping eggs for nuts/seeds/legumes and saw the same risk reduction. (Table 4)