https://www.bmj.com/content/bmj/366/bmj.l4897/F1.large.jpg?download=true https://www.bmj.com/content/bmj/366/bmj.l4897/F1.large.jpg?d... Looking at those figur

https://www.bmj.com/content/bmj/366/bmj.l4897/F1.large.jpg?download=true https://www.bmj.com/content/bmj/366/bmj.l4897/F1.large.jpg?d... Looking at those figures, vegetarian diets have lower ratio of stroke case / population, I know I am not taking other risk variables into account but it is still a big difference. Could some help me understand it? Thanks