Statin use after acute myocardial infarction: a nationwide study in Denmark

Aims To study outpatient statin use after first acute myocardial infarction (AMI) in Denmark between 1995 and 2002 and to determine the predictors of statin use. Methods This is a nationwide population-based study using administrative registries. Patients with first AMI between 1995 and 2002 older than 30 years of age and alive 6 months after discharge (n = 45 219) were identified through the National Patient Registry. The statins purchased by these patients within 6 months after discharge were determined using the Registry of Medicinal Product Statistics, a nationwide prescription database. Results Statin use following AMI increased from 13% in 1995 to 61% in 2002. In 2002, 81% of patients aged 30-64 years used statins. Older patients used fewer statins, but use increased more among patients aged 75-84 years: from 1.3% to 43%. Use in elderly patients did not differ according to gender in 2000-02, but young men used more than younger women. In 2000-02, patients with diabetes (odds ratio (OR): 0.84; 95% confidence interval (CI): 0.74-0.95) and with heart failure (OR: 0.70; 95% CI: 0.64-0.76) were undertreated; this trend was present throughout the period. Conclusions In this nationwide study, younger patients after AMI had high statin use in 2002, but high-risk patients such as those with diabetes and heart failure were still being undertreated.