Importance of diagnostic setting in determining mortality in patients with new-onset heart failure: temporal trends in Denmark 1997-2017.

Between 1997 and 2017, HF changed from being primarily diagnosed during hospitalization to being mostly diagnosed in the outpatient setting. Out-patients had much lower mortality rates than in-patients throughout the study period. Despite a significant decrease in mortality risk for all HF patients, neither in-patients nor out-patients experienced a reduction in the risk of a HF hospitalization.