Omega-3 fatty acid compositions comprising eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) are provided, where the compositions are useful for treating, reducing the occurrence of, or preventing major adverse cardiovascular events or major coronary events in patients who have established cardiovascular disease without prior myocardial infarction, preventing their further progression, and treating underlying risk factors for CVD such as hypertension, dyslipidemia, obesity and/or diabetes.