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Abstract
Objectives: To compare the risk of acute coronary syndrome (ACS) between patients with and without ankylosing spondylitis (AS).
Method: This retrospective cohort study identified all patients with AS aged ≥ 18 years newly diagnosed from 2000 to 2009, registered in the National Health Insurance Research Database (NHIRD) in Taiwan. The non-AS cohort consisted of fourfold randomly selected control patients free of AS, frequency matched by age, sex, and diagnosis year. The incidence of ACS was determined for both AS and non-AS cohorts.
Results: We selected 6262 patients with AS and 25 048 patients without AS. The patients with AS were more prevalent than those without, with co-morbidities of hypertension, diabetes mellitus (DM), hyperlipidaemia, stroke, and peripheral vascular diseases. The overall incidence rate of ACS was higher in the AS cohort than in the non-AS cohort (4.4 vs. 2.9 per 1000 person-years), with an adjusted hazard ratio (aHR) of 1.36 [95% confidence interval (CI) 1.16–1.59]. AS patients with co-morbidities of hypertension, DM, and cancer had an aHR of 7.74 for ACS, compared to those without these co-morbidities.
Conclusions: AS patients are at higher risk of ACS compared with non-AS subjects. Management of CV risk factors should be taken into account for the treatment of patients with AS, especially for patients with co-morbidities of hypertension, DM, and cancer.
Acknowledgements
This work was supported by study grants (DMR-101-060 and DMR-102-023) from our hospital, and from the Clinical Trial and Research Centre of the Taiwanese Department of Health (DOH102-TD-B-111-004), as well as from Taiwan’s Department of Health Cancer Research Centre for Excellence (DOH102-TD-C-111-005).