Delirium and its association with short-term outcomes in younger and older patients with acute heart failure.

============================== ACADEMIC EDITOR: Among points raised by reviewers the following should be especially addressed: Please describe better patient selection (“convenience sample” is not sufficient) and give an estimate of exclusion rate Describe better among-group differences of HF mortality risk (the highly significant difference are not apparent from data in table 1) Include a supplementary analysis regarding the difference between older and younger patients and briefly discuss the reason of the lack of prognostic meaning of age and the similar prevalence of delirium between groups, both unexpected Among limitations, you should include the lack of information regarding functional status (frailty and/or disability).

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