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Effect estimates of meta-analyses reporting an association between atrial fibrillation and dementia, with the vertical line representing no effect. To note, Xu et al. treated ORs as approximates to RRs, as such, violations of this assumption may have implications for the comparability of ORs and RRs, meaning that interpretation of these pooled estimates should be done cautiously. AD, Alzheimer's disease; HR, hazard ratio; OR, odds ratio; RR, risk ratio.
