Publications of the Week, November 23

2020-11-23

Major GI bleeding in elderly individuals taking aspirin

Mahady SE, Margolis KL, Chan A, et al. Major GI bleeding in older persons using aspirin: incidence and risk factors in the ASPREE randomised controlled trial. Gut. 2020 Aug 3:gutjnl-2020-321585. doi: 10.1136/gutjnl-2020-321585. Epub ahead of print. PMID: 32747412.

Aspirin is widely used as a secondary prevention agent in patients who have suffered an acute coronary syndrome or ischemic stroke, as it confers a greater risk reduction for recurrent cardiovascular events than a risk increase in clinically important (major) bleeding.

The net clinical benefit of aspirin for primary prevention in patients without a history of prior cardiovascular events is less clear, especially in the elderly. To address this uncertainty, the ASPREE (ASPirin in Reducing Events in the Elderly) trial recruited 19,114 healthy, community-dwelling elderly (≥70 years) persons without a history of cardiovascular disease, dementia, or other chronic disease that could limit survival to <5 years. Patients were randomly allocated to receive aspirin, 100 mg daily, or placebo and were followed prospectively, with a median follow-up of 4.7 years. In the ASPREE study aspirin did not confer any statistically significant therapeutic advantage but was associated with a significantly higher risk for major bleeding (hazard ratio [HR], 1.38; 95% CI, 1.18-1.62).

This study focused on the risk for major gastrointestinal (GI) bleeding associated with aspirin use, defined as bleeding that resulted in transfusion, hospitalization, surgery, or death, and on risk factors associated with such bleeding. This knowledge is clinically relevant because the GI tract is the most common site for aspirin-associated bleeding and elderly patients may not manifest with typical symptoms of GI mucosal erosion (eg, postprandial abdominal pain), whereas their initial presentation may be as life-threatening bleeding or symptoms related to severe anemia.

In the entire study population, there were 137 upper GI bleeds (89 in the aspirin arm and 48 in the placebo arm; HR, 1.87; 95% CI, 1.32-2.66) and 127 lower GI bleeds (73 in the aspirin arm and 54 in the placebo arm; HR, 1.36; 95% CI, 0.96-1.94). Multivariable regression analysis identified increasing age, smoking, hypertension, chronic kidney disease, and obesity as risk factors for GI bleeding. The absolute 5-year risk of GI bleeding was 0.25% (95% CI, 0.16-0.37) in a 70-year-old without any of these risk factors who was not taking aspirin and up to 5.03% (95% CI, 2.56-8.73) in an 80-year-old with ≥1 of these risk factors who was taking aspirin.

These data quantify and highlight the risks associated with aspirin use in the elderly and may assist clinicians and patients to make informed decisions about aspirin when used as primary prevention against cardiovascular disease.

See also
  • Publications of the Week, November 9 A digest of noteworthy publications curated by editors from McMaster University. This week’s focus: criteria for the clinical diagnosis of brain death (part 2).
  • Publications of the Week, October 26 A digest of noteworthy publications curated by editors from McMaster University. This week’s focus: criteria for the clinical diagnosis of brain death (part 1).
  • Publications of the Week, September 14 A digest of noteworthy publications curated by editors from McMaster University. This week’s focus: corticosteroid therapy for hospitalized critically ill patients with COVID-19 who required respiratory support.
  • Publications of the Week, August 24 A digest of noteworthy publications curated by editors from McMaster University. This week’s focus: data on the association of estrogen plus progestin or estrogen alone with breast cancer incidence and mortality.
  • Publications of the Week, August 10 A digest of noteworthy publications curated by editors from McMaster University. This week’s focus: different types of P2Y12 inhibitors in acute coronary syndrome.
  • Publications of the Week, July 13 A digest of noteworthy publications curated by editors from McMaster University. This week’s focus: triple vs dual therapy with or without glucocorticoids in moderate to very severe COPD.

We would love to hear from you

Comments, mistakes, suggestions?

We use cookies to ensure you get the best browsing experience on our website. Refer to our Cookies Information and Privacy Policy for more details.