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This corrects the article: “Ioannou A. Evolution of Disease-modifying Therapy for Transthyretin Cardiac Amyloidosis. Heart International. 2024;18(1):30-37”. Two typography errors were included incorrectly due to an editorial error. In Table 1, “eplontersen” was incorrectly written as “eplomtersen”. This has been corrected in the text. In the section “Eplontersen”, the administration schedule should be written as […]

Calculating the 30-day survival rate in acute myocardial infarction: should we use the treatment chain or the hospital catchment model?

Jan Norum, Tonya M. Hansen, Anders Hovland, Lise Balteskard, Bjørn Haug, Frank Olsen, Thor Trovik
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Published Online: Aug 23rd 2018 Heart International. 2017;12(1):e24-e30 DOI: https://doi.org/10.5301/heartint.5000238
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Abstract

Overview

Introduction.
Acute myocardial infarction (AMI) is a potentially deadly disease and significant efforts have been
concentrated on improving hospital performance. A 30-day survival rate has become a key quality of care indicator. In Northern Norway, some patients undergoing AMI are directly transferred to the Regional Cardiac Intervention Center at the University Hospital of North Norway in Tromsø. Here, coronary angiography and percutaneous
coronary intervention is performed. Consequently, local hospitals may be bypassed in the treatment chain, generating differences in case mix, and making the treatment chain model difficult to interpret. We aimed to compare
the treatment chain model with an alternative based on patients’ place of living.
Methods.
Between 2013 and 2015, a total of 3,155 patients were registered in the Norwegian Patient Registry
database. All patients were categorized according to their local hospital’s catchment area. The method of Guo-Romano, with an indifference interval of 0.02, was used to test whether a hospital was an outlier or not. We
adjusted for age, sex, comorbidity, and number of prior hospitalizations.
Conclusions.
We revealed the 30-day AMI survival figure ranging between 88.0% and 93.5% (absolute difference
5.5%) using the hospital catchment method. The treatment chain rate ranged between 86.0% and 94.0% (absolute difference 8.0%). The latter figure is the one published as the National Quality of Care Measure in Norway.
Local hospitals may get negative attention even though their catchment area is well served. We recommend the
hospital catchment method as the first choice when measuring equality of care.

Keywords

Myocardial infarction, Norway, Quality, Survival

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Article Information

Disclosure

Financial support: The publication charges for this article have been funded by a grant from the publication fund of UiT – The Arctic University of Norway.

Correspondence

Jan Norum Department of Clinical Medicine Faculty of Health Science UiT – The Arctic University of Norway HansineHansens veg 74 N-9019 Tromsø, Norway jan.norum@uit.no

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