The Study
The efficacy and safety of lower-dose aspirin for primary and secondary prevention of cardiovascular disease in the elderly: an interim analysis of a multicenter, prospective, observational study
This study watched what happened when doctors gave different aspirin doses to older people and saw that those on 50mg bled less — but the doctors chose the dose, not a coin flip. So we can't say the lower dose caused less bleeding; maybe those people were just healthier or more careful. It shows a pattern, not proof.
Analysis score
Maximum 72 for a cohort study.
Where the score came from
Scientists studied older people taking either a small (50 mg) or regular (100 mg) aspirin daily to see which was better for heart health.
Where does this study sit?
Systematic Reviews & Meta-analyses
Max 100Randomized Trials
Max 90Cohort Studies
Max 72Case-Control
Max 58Cross-Sectional
Max 44Case Reports & Series
Max 30Expert Opinion
Max 565 / 100
Quality score
Groups of people are followed over time to see who develops an outcome. Strong for identifying risk factors and associations, but cannot prove causation as firmly as RCTs.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Yes — fewer bleeds mean fewer hospital visits and safer long-term use, especially for older adults at higher bleeding risk.
- 2Both doses prevented heart attacks and strokes equally.
- 3But the 50 mg group had nearly 3 times less bleeding in the primary prevention group and 1.5 times less in the secondary group.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Frontiers in Cardiovascular Medicine
Year
2026
Authors
Xiting Wang, Hong Qi, Yuan Wu, Hongliang Cong, Pida Hao, Xiqiang Liu, Yong Liu, Zhuhua Yao, Aiping Jin, Yan Hou, Nabuqi He, Yingxin Zhao, Yanmei Sun, X. Qian, Keshan Liang, Huaizhong Zhang, Lili Liu, Zheng Zhang, Yingwu Liu, P. Dou, Shudong Xia, Hongwei Li, Jiuyu Yang, Jie Hu, Zhangyong Xia, Bo Liu, Hailian Jin, Xiulian Yan, Wei Miao, Hua Guo, Longmei Zhao, Qingtan Zhang, Tao Tian, Xibo Sun, Jianwei He, Xiaoping Chen, Zhaohui Wang, Zheng Zhang, Qing Liu, Jianchun Wang, Sainan Zhu, Mei-Qi Liu
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.