AI Article Synopsis
- Colorectal cancer is a leading cause of cancer-related deaths globally, and recent trials suggest that daily aspirin use may help prevent this type of cancer.
- A systematic review of randomized controlled trials found that aspirin effectively reduced the risk of developing colorectal adenomas after 3 years and advanced lesions after 5 years.
- However, aspirin did not show significant benefits in reducing risks for advanced lesions or adenomas beyond a 5-year period.
Article Abstract
Purpose: Colorectal cancer is the second most common cause of cancer death worldwide. Aspirin, due to its antineoplastic effects, has been suggested to have chemopreventive effects on colorectal cancer based on recent trials. We conducted this systematic review and meta-analysis to provide an updated evidence about the long-term efficacy of daily aspirin use in the prevention of colorectal cancer.
Methods: We searched Medline/PubMed, Ovid, Web of Science, and Cochrane Library. We included randomized controlled trials (RCTs) that compared the efficacy of daily aspirin use to placebo in healthy individuals at the time of study entry. The desired outcomes of this review were the incidence of advanced lesions (i.e., adenomas with villous component, adenomas ≥1 cm in diameter, adenomas with high-grade dysplasia, and/or invasive cancer) and colorectal adenomas.
Results: A total of 15 articles representing 11 RCTs were included. Overall, the results indicated that aspirin significantly reduced the risk of developing colorectal adenomas but not advanced lesions at 3 years (risk ratio (RR) = 0.84, P < 0.05 and risk ratio = 0.82, P = 0.10, respectively). At 5 years, the risk of advanced lesions but not adenomas was reduced by aspirin (RR = 0.68, P < 0.05 and RR = 0.87, P = 0.22, respectively). Aspirin was not found to have an effect on the risk of advanced lesions or adenomas beyond 5 years (hazard ratio (HR) = 0.82, P = 0.07 and HR = 0.99, P = 0.82, respectively).
Conclusion: Overall, aspirin (particularly high dose) only reduced the risk of advanced lesions up to 5 years.
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| http://dx.doi.org/10.1007/s00384-021-03880-3 | DOI Listing |
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