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- Title
Ascertainment, classification, and impact of neoplasm detection during prolonged treatment with dual antiplatelet therapy with prasugrel vs. clopidogrel following acute coronary syndrome.
- Authors
Roe, Matthew T.; Cyr, Derek D.; Eckart, Debra; Schulte, Phillip J.; Morse, Michael A.; Blackwell, Kimberly L.; Ready, Neal E.; Zafar, S. Yousuf; Beaven, Anne W.; Strickler, John H.; Onken, Jane E.; Winters, Kenneth J.; Houterloot, Lisa; Zamoryakhin, Dmitry; Wiviott, Stephen D.; White, Harvey D.; Prabhakaran, Dorairaj; Fox, Keith A. A.; Armstrong, Paul W.; Ohman, E. Magnus
- Abstract
Aims Studies have suggested increased cancer incidence associated with long-termdual antiplatelet therapy (DAPT) for acute coronary syndrome (ACS).We evaluated cancer incidence and treatment-related differences in an analysis of DAPT for ACS. Methods and results The Targeted Platelet Inhibition to Clarify the Optimal Strategy to Medically Manage Acute Coronary Syndromes trial enrolled 9326 participants with ACS, who received aspirin plus clopidogrel or prasugrel. Median treatment exposure was 15 months. Cancer history and screening procedureswere collected. Suspected non-benign neoplasm events were reported and adjudicated. The primary outcome was detection of new, non-benign neoplasm. Factors associated with neoplasm events, the relationship of these events to cardiovascular and bleeding endpoints, and treatment-related differences in neoplasm detection were studied. Among 9240 participants who received =1 dose of study drug, 1.8% had a confirmed neoplasm event. The efficacy composite of cardiovascular death, myocardial infarction, or stroke occurred more frequently among those with a neoplasm event vs. those without (18.2 vs. 13.5%) as did Global Use of Strategies to Open Occluded Coronary Arteries severe/moderate bleeding (11.2 vs. 1.5%). Screening rates were substantially higher in North America andWestern Europe/Scandinavia vs. other regions. Factors most strongly associated with detection of neoplasm events were older age, region, male sex, and current/recent smoking. Among the pre-specified population without a history of neoplasm or previous curative treatment for neoplasm (n = 9105), the incidence of neoplasm events was similar with prasugrel vs. clopidogrel (1.8 vs. 1.7%; HR = 1.04; 95% CI 0.77-1.42; P = 0.79). Conclusions Neoplasm events were infrequent during long-term DAPT after ACS, were associated with differential cancer-screening practices across regions, and the frequency of neoplasm detection was similar with prasugrel vs. clopidogrel.
- Publication
European Heart Journal, 2016, Vol 37, Issue 4, p412
- ISSN
0195-668X
- Publication type
Article
- DOI
10.1093/eurheartj/ehv611