The Study
Testosterone replacement therapy is not associated with increased prostate cancer incidence, prostate cancer-specific, or cardiovascular disease-specific mortality in Finnish men
This study looked at men who took testosterone medicine and those who didn’t, and saw that the ones who took it didn’t get more prostate cancer or die more from heart problems. But because it wasn’t a fair test where people were randomly assigned, we can’t say the medicine caused the difference — it might just be that healthier men were more likely to get the medicine.
Analysis score
Maximum 72 for a cohort study.
Where the score came from
This study looked at older men who took testosterone medicine and compared them to men who didn't. It tracked them for 18 years to see if they got more cancer or died more from heart issues.
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 553 / 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.
- 1The lower death rates are meaningful — especially the nearly half reduction in prostate cancer deaths — but the heart disease and overall death benefits are small and not strongly certain.
- 22,919 men took testosterone; 285 got prostate cancer.
- 3Those on testosterone were 48% less likely to die from prostate cancer, 13% less likely to die from heart disease, and 7% less likely to die from any cause.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Acta Oncologica
Year
2023
Authors
A. Siltari, T. Murtola, Josefina Kausz, K. Talala, K. Taari, T. Tammela, Anssi Auvinen
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.