A randomized clinical trial of secondary prevention among women hospitalized with coronary heart disease

Abstract

Background: Secondary prevention improves survival, yet implementation is suboptimal. We tested the impact of a systematic hospital-based educational intervention vs. usual care to improve rates of adherence to secondary prevention guidelines among women hospitalized with coronary heart disease (CHD), according to their ethnic status.

Methods: Women (n = 304, 52% minorities) hospitalized with CHD were randomly assigned to a systematic secondary prevention educational intervention vs. usual care. Adherence to goals for smoking cessation, weight management, physical activity, blood pressure <140/90 mm Hg, low-density lipoprotein cholesterol (LDL-C) <100 mg/dL (2.59 mmol/L), and use of aspirin/anticoagulants, beta-blockers, and angiotensin-converting enzyme (ACE) inhibitors were assessed at 6 months.

Results: On admission, minority women were less likely than white women to meet the goals for blood pressure (OR = 0.46, 95% CI 0.26-0.80), LDL-C (OR = 0.57, CI 0.33-0.94), and weight management (OR = 0.40, 95% CI 0.20-0.82). There was no difference between the intervention and usual care groups in a summary score of goals met at study completion; however, minority women in the intervention group were 2.4 times more likely (95% CI 1.13-5.03) to reach the blood pressure goal at 6 months compared with minority women in usual care. White women in the intervention group were 2.86 times more likely (95% CI 1.06-7.68) to report use of beta-blockers at 6 months compared with white women in usual care. In a logistic regression model, the interaction term for ethnic status and group assignment was significant for achieving the blood pressure goal (p = 0.009).

Conclusions: A healthcare systems approach to educate women about secondary prevention and blood pressure control may differentially benefit ethnic minority women compared with white women.

FIG. 1.

Study flow diagram.

FIG. 2.

Proportion of white and minority women achieving secondary prevention goals at 6 months, by group assignment. BP, blood pressure; LDL, low-density lipoprotein; ASA, antiplatelet/anticoagulant therapy; ACE, angiotensin-converting enzyme inhibitor therapy; BB, beta-blocker therapy.