Problem
Chen S, Underwood BR, Jones PB, Lewis JR, Cardinal RN. 2022. Association between lithium use and the incidence of dementia and its subtypes: a retrospective cohort study. PLOS Medicine. 19(3): e1003941.
Make sure it is that article with that title.
• Was the hypothesis supported?
• Why is a randomized controlled trial (RCT) needed to test whether lithium can prevent dementia?
• What is the hypothesis to be tested with an RCT?