Outcomes and transfer patterns for first Non-ST-elevation myocardial infarction (NSTEMI): comparisons between community and tertiary care hospitals.

BACKGROUND

Transfer patterns, procedure rates, and outcomes of patients with non-ST-segment elevation myocardial infarction (NSTEMI) presenting to Canadian community hospitals are not well understood.

METHODS

We documented all patients admitted to British Columbia (BC) hospitals with a primary diagnosis of NSTEMI between 2007 and 2008. Patients were divided by admitting hospital type into tertiary care hospitals, nonremote community hospitals, and remote community hospitals. The aims were to compare transfer rates and time to transfer to a tertiary hospital as well as procedure rates and outcomes at index admission, at 30 days, and at 1 year.

RESULTS

The mean transfer rates to a tertiary hospital were 72.6% for nonremote and 57.1% for remote community hospitals (P < 0.001). Times to and rates of cardiac procedures differed significantly among these 3 hospital types. Admission to a nonremote or remote community hospital was associated with similar 1-year mortality compared with admission to a tertiary care hospital (nonremote hospitals, adjusted odds ratio [OR], 0.87; P = 0.26; remote hospitals, adjusted OR, 1.19; P = 0.33). At 1 year, admission to a nonremote community hospital was associated with a lower composite outcome of death or readmission for acute myocardial infarction (AMI) (adjusted OR, 0.80; P = 0.04).

CONCLUSIONS

One-year mortality rates were not different between patients with NSTEMI admitted to BC community and tertiary care hospitals; however, the rate of readmission for AMI/death was significantly less in patients admitted to nonremote community hospitals. This should prompt the evaluation of key outcomes in NSTEMI in other community hospital settings.