Blood Pressure and Risk of Secondary Cardiovascular Events in Women The Women’s Antioxidant Cardiovascular Study (WACS)

Background— In apparently healthy people, the relation between blood pressure and risk of subsequent cardiovascular disease (CVD) is linear. In persons with CVD, the relation is uncertain. Methods and Results— We conducted a prospective study of 5218 older women with CVD who reported their blood pressure at baseline in the Women’s Antioxidant Cardiovascular Study (WACS), an ongoing double-blind, placebo-controlled secondary prevention trial of the benefits and risks of antioxidant vitamins, folic acid, vitamin B6, and vitamin B12 among women with CVD or ≥3 coronary risk factors. A total of 661 confirmed CVD events (nonfatal myocardial infarction, nonfatal stroke, coronary artery bypass graft procedure, percutaneous coronary angioplasty, or CVD death) occurred during a median follow-up of 6.5 years. After controlling for age, randomized treatment assignment, antihypertensive medication use, and coronary risk factors, we found that systolic blood pressure (SBP) was a strong predictor of CVD events and that ...