yeah, that confuses me too. i was also surprised by the size of the effect. being an abstainer was associated with relatively large increased risks, as you hig

yeah, that confuses me too. i was also surprised by the size of the effect. being an abstainer was associated with relatively large increased risks, as you highlight. and later it says "with every 7 unit/week increase, there was a significant 17% increase in dementia risk," which is quite a lot smaller than the effect from abstinence.