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Outcomes in elderly patients with acute coronary syndromes randomized to enoxaparin vs. unfractionated heparin: results from the SYNERGY trial
Outcomes in elderly patients with acute coronary syndromes randomized to enoxaparin vs. unfractionated heparin: results from the SYNERGY trial EUROPEAN HEART JOURNAL Lopes, R. D., Alexander, K. P., Marcucci, G., White, H. D., Spinler, S., Col, J., Aylward, P. E., Califf, R. M., Mahaffey, K. W. 2008; 29 (15): 1827-1833Abstract
Elderly patients are at high risk from non-ST-segment elevation acute coronary syndromes (NSTE ACS) as well as from treatment-related complications. Age-associated changes in physiology may alter the risk and benefit expected from therapy. The SYNERGY database was used to study the influence of age on treatment outcomes with enoxaparin vs. unfractionated heparin (UFH) in patients with high-risk NSTE ACS.Age was analysed as a continuous and categorical variable (<65, 65-74, and >or=75 years, and <75 and >or=75 years) for descriptive purposes. Logistic regression was used to adjust the outcomes of 30-day death, death or myocardial infarction (MI), and major bleeding for baseline characteristics. Odds ratios compared outcomes by age and by treatment within age groups. Model interaction terms were used to test for statistically different outcomes by treatment and age. Overall, 9977 randomized patients had age information, of whom 25.5% (2540) were >or=75 years of age. Elderly patients (>or=75 years) had more cardiovascular risk factors, prior cardiac disease, and higher acuity at presentation. After adjustment, advanced age (per 10 years) was associated with 30-day death or MI [risk odds ratios (ROR): 1.14, P = 0.002], 30-day death (ROR: 1.54, P < 0.0001), and 1-year death (ROR: 1.47, P < 0.0001), as well with TIMI major bleeding (ROR: 1.21, P = 0.001), GUSTO severe bleeding (ROR: 1.20, P = 0.047), and transfusion (ROR: 1.04, P = 0.324). Although there was a higher rate of GUSTO severe bleeding noted with enoxaparin in elderly patients, the overall relationships between treatment (UFH or enoxaparin) and outcomes did not vary significantly as a function of the patient's age.Although higher rates of adverse events are seen in the oldest subgroup (age >or=75 years) treated with enoxaparin, statistical comparisons confirm similar efficacy and safety of enoxaparin and UFH across age subgroups as was demonstrated overall in SYNERGY.
View details for DOI 10.1093/eurheartj/ehn236
View details for Web of Science ID 000258137200010
View details for PubMedID 18519426