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To the Editor: we read with interest Ball et al‘'s1 article exploring the prevalence of mild cognitive impairment (MCI) in patients with chronic atrial fibrillation (AF). This study suggests that MCI is highly prevalent (50% to 65%) among older hospitalised patients with AF. This is valuable research, highlighting the much-overlooked association between cognitive impairment (CI) and AF. We feel, however, that the prevalence rates reported may overstate the true prevalence of MCI in older adults with AF. In this case, MCI was classified using a cut-off score of less than …
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