The aspirin cardiovascular/gastrointestinal risk calculator--a tool to aid clinicians in practice

Area of Science:

• Cardiology
• Gastroenterology
• Clinical Decision Support

Background:

• Assessing the balance between gastrointestinal (GI) and cardiovascular (CV) risks versus the benefits of low-dose aspirin presents clinical challenges.
• Individual patient risk stratification for low-dose aspirin therapy requires careful consideration of potential adverse events.

Purpose of the Study:

• To develop a clinical decision support tool for estimating individual patient CV and GI risks associated with low-dose aspirin.
• Facilitate informed decision-making regarding the initiation and management of low-dose aspirin therapy.

Main Methods:

• Constructed risk-ratio estimations based on incidence data for CV events and upper GI complications.
• Incorporated risk factors, including low-dose aspirin use, proton pump inhibitor (PPI) co-therapy, and H. pylori eradication.
• Assumed baseline GI complication incidence, aspirin-induced risk increase, and risk reduction with PPIs and H. pylori eradication.

Main Results:

• A web-based calculator (http://www.asariskcalculator.com) was developed to estimate CV and GI risks.
• In low CV risk patients, GI complications from aspirin may outweigh prevented CV events.
• Even in high CV risk patients, GI complications can offset the benefits of aspirin; PPIs can mitigate but may not eliminate this risk in high GI risk individuals.

Conclusions:

• Clinical scenarios exist where aspirin-induced upper GI complications may exceed prevented CV events.
• A risk calculator is essential for guiding physicians in optimizing aspirin therapy and maximizing patient benefit while minimizing harm.