Objective: To analyse short- and long-term outcomes and prognostic factors in a large population-based cohort of unselected patients with a first emergency admission for suspected acute coronary syndrome between 1990 and 2000 in Scotland.
Methods: All first emergency admissions for acute myocardial infarction (AMI) and all first emergency admissions for angina (the proxy for unstable angina) between 1990 and 2000 in Scotland (population 5.1 million) were identified. Survival to five years was examined by Cox multivariate modelling to examine the independent prognostic effects of diagnosis, age, sex, year of admission, socioeconomic deprivation and co-morbidity.
Results: In Scotland between 1990 and 2000, 133 429 individual patients had a first emergency admission for suspected acute coronary syndrome: 96 026 with AMI and 37 403 with angina. After exclusion of deaths within 30 days, crude five-year case fatality was similarly poor for patients with angina and those with AMI (23.9% v 21.6% in men and 23.5% v 26.0% in women). The longer-term risk of a subsequent fatal or non-fatal event in the five years after first hospital admission was high: 54% in men after AMI (53% in women) and 56% after angina (49% in women). Event rates increased threefold with increasing age and 20–60% with different co-morbidities, but were 11–34% lower in women.
Conclusions: Longer-term case fatality was similarly high in patients with angina and in survivors of AMI, about 5% a year. Furthermore, half the patients experienced a fatal or non-fatal event within five years. These data may strengthen the case for aggressive secondary prevention in all patients presenting with acute coronary syndrome.
- AMI, acute myocardial infarction
- CABG, coronary artery bypass graft
- ICD, International classification of diseases
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Published Online First 14 June 2006
Competing interests: None declared.
NM and KM were funded by the British Heart Foundation. SS was supported by the Australian National Heart Foundation.
Author contributions: SC developed and co-ordinated this study, contributed to the analyses and interpretation, and drafted and finalised the report. KM and NM analysed the data, and contributed to the interpretation and report drafting. SS, JC and JM each contributed to the study design, analyses, interpretation and report drafting. SF and AF extracted the data and contributed to the design, analyses and writing. JB and AR contributed to the data analysis, design and drafting. All investigators contributed to the final paper.
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