Omega-3 index and smoking in patients with acute ST-elevation myocardial infarction taking statins: a case-control study in Korea Full Text
Lipids in Health and Disease,  Clinical Article

Kim YJ et al. – This study shows that relative to controls, acute ST–elevation myocardial infarction (STEMI) cases are more likely to be smokers and to have a lower omega–3 index, even though the cases were taking statins. An omega–3 index of at least 11% and abstinence from smoking are associated with cardioprotection for Koreans.

Methods
  • Authors conducted a case–control study in which omega–3 fatty acids and lifestyle factors were determined in 24 consecutive Korean patients taking statins with angiographically confirmed acute STEMI and 68 healthy controls without acute STEMI.
  • The omega–3 index was calculated by the sum of eicosapentaenoic acid and docosahexaenoic acid in erythrocyte membranes.
  • Multivariable adjusted regression analysis was used to assess independent associations between acute STEMI, omega–3 index, and lifestyle factors after adjusting for age, sex, and body mass index.

Results
  • The mean age of total subjects was 59.9 years, and 57.6% of the subjects were male.
  • The omega–3 index was significantly lower in cases (8.83%) than controls (11.13%; P < 0.001); however, total trans–fatty acids were not different between the two groups.
  • The omega–3 index was inversely associated with odds for being a case (OR 0.16 (95% CI 0.03–1.14); P = 0.047), while smoking was positively associated with odds for being a case (OR 6.67 (95 % CI 1.77–25.23); P = 0.005) after adjusting for all confounding variables.

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