Adherence to evidence-based therapies after discharge for acute coronary syndromes: An ongoing prospective, observational study
ABSTRACT To determine the rates of patient adherence to key evidence-based therapies at 6 months after hospital discharge for an acute coronary syndrome.
In this nonrandomized, prospective, multinational, multicenter study, adherence to aspirin, beta-blockers, statins, or angiotensin-converting enzyme (ACE) inhibitors 6 months after discharge for myocardial infarction or unstable angina was assessed in 21,408 patients aged 18 years or older. Patients were enrolled at 104 tertiary and community hospitals representing a broad range of care facilities and practice settings (e.g., teaching vs. nonteaching).
Of 13,830 patients, discontinuation of therapy was observed at 6-month follow-up in 8% of those taking aspirin on discharge, 12% of those taking beta-blockers, 20% of those taking ACE inhibitors, and 13% of those taking statins. In a multivariate analysis, adherence to beta-blocker therapy was higher in patients with a myocardial infarction (odds ratio [OR] = 1.25; 95% confidence interval [CI]: 1.06 to 1.47), hypertension (OR = 1.33; 95% CI: 1.15 to 1.54), ST-segment elevation myocardial infarction (OR = 1.33; 95% CI: 1.11 to 1.61), or non-ST-segment elevation myocardial infarction (OR = 1.25; 95% CI: 1.08 to 1.45). Aspirin adherence was higher among patients cared for by cardiologists (OR = 1.45; 95% CI: 1.19 to 1.75; P <0.001) than among those cared for by nonspecialists. Male sex and prior heart failure were associated with improved adherence to ACE inhibitor therapy. Hypertension was associated with poorer adherence to statin therapy (OR = 0.85; 95% CI: 0.74 to 0.99; P = 0.04).
Among patients prescribed key evidence-based medications at discharge, 8% to 20% were no longer taking their medication after 6 months. The reasons for noncompliance are complex, and may be elucidated by future studies of medical and social determinants.
- SourceAvailable from: ncbi.nlm.nih.gov[Show abstract] [Hide abstract]
ABSTRACT: Most reviews of drug withdrawal effects focus on drugs of potential abuse such as opioids, benzodiazepines, etc. Abrupt discontinuation of many other drugs used in medicine cause withdrawal syndromes, some of which can be fatal. Discontinuation of a number of cardiovascular drugs can increase risk of cardiovascular events above that of people not taking these drugs. These include β-adrenergic receptor antagonists, aspirin, HMG-CoA reductase inhibitors (statins), and heparin. Rebound hypertension occurs after abrupt cessation of many antihypertensive drugs. The possibility of discontinuation syndromes has usually been neglected until adverse clinical events force them to be noticed. Attention to the possibility of drug discontinuation effects is an important part of drug safety evaluation.Journal of Pharmacology and Experimental Therapeutics 08/2011; 339(2):324-8. DOI:10.1124/jpet.111.183285 · 3.86 Impact Factor
- [Show abstract] [Hide abstract]
ABSTRACT: Interactive voice response (IVR) technology was used to increase medication compliance and reduce adverse events (hospitalization and emergency visits) in post-cardiac surgery patients. Patients randomized to intervention received 11 automated IVR calls in the six months after discharge. A total of 331 patients (164 IVR, 167 usual care) participated. Findings showed significant differences in the IVR group for the primary composite outcome of compliance and adverse events (relative risk (RR] and 95% confidence interval [CI]: 0.60 [0.37, 0.96), p = 0.041) and the secondary outcome of medication compliance (RR: 0.34 (0.20, 0.56), p < 0.0001). There was no significant impact on emergency room visits (RR: 1.04 (0.63, 1.73J) and hospitalization (RR: 0.77 [0.41, 1.45]). Most patients (93%) preferred IVR follow-up to no follow-up.Canadian journal of cardiovascular nursing = Journal canadien en soins infirmiers cardio-vasculaires 01/2009; 19(3):9-15.
- [Show abstract] [Hide abstract]
ABSTRACT: Despite the importance of secondary prevention, nonadherence rates for patients with myocardial infarction (MI) range from 13% to 60% for prescribed, evidence-based medicines. Although rates and consequences of discontinuance vary for different medications, the existing literature provides little insight into reasons for discontinuance. To address this gap, we explored clopidogrel and cholesterol-lowering therapy (CLT) discontinuance after an MI to understand patients' reasons for stopping these 2 medications. In this qualitative descriptive study, 2 groups of patients who stopped a heart medication-either clopidogrel or CLT-were recruited from a prospective MI registry. Patients who discontinued CLT (n = 29) or clopidogrel (n = 11) were interviewed within 18 months of hospitalization. Patients were recruited and interviewed until data saturation was achieved. The Health Belief Model was used as an organizing framework in analyzing and coding the narrative data. The codes were then summarized for each group and compared to identify similarities and differences in reasons for CLT and clopidogrel discontinuance. The most common reason for CLT discontinuance was adverse effects that were painful and interfered with daily life. Less common reasons for discontinuance were prescription confusion, cost, mistrust in medicines/healthcare system, and preference for alternative therapies. Reasons for clopidogrel discontinuance were duration confusion, adverse effects, and cost. Although doctors stopped patients' clopidogrel in preparation for surgery, doctors conceded to discontinuance of CLT for patients who experienced adverse effects after trying 2 to 3 different CLTs. Patients who discontinued CLT were more likely to believe that they did not need the treatment than do patients who discontinued clopidogrel. Clinicians should be aware that reasons may vary across patients and medication class for prematurely stopping therapy; thus, proactive interventions should be targeted to address these differences. Identifying at-risk patients for targeted interventions to prevent premature cardiac medication discontinuation is vital.The Journal of cardiovascular nursing 01/2009; 24(5):371-9. DOI:10.1097/JCN.0b013e3181ae7b2a · 1.81 Impact Factor