The Study
Adverse events associated with testosterone replacement in middle-aged and older men: a meta-analysis of randomized, placebo-controlled trials.
This study looked at many experiments where some men got testosterone and others got fake pills, and found that men who got testosterone were more likely to have high blood thickness and more prostate checks. But we can't be 100% sure because we didn't see the full details of those experiments.
Analysis score
Maximum 100 for a systematic review with meta-analysis.
Where the score came from
This study looked at older men who took testosterone to see if it caused problems. It compared them to men who took a sugar pill.
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 548 / 100
Quality score
The highest quality evidence. These studies systematically search, appraise, and synthesize results from multiple individual studies, providing the most reliable summary of current knowledge.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Yes — hematocrit increase is common and risky; prostate checks are needed, but no extra heart risks were found.
- 2Men on testosterone had 78% higher chance of prostate issues being found and nearly 4 times higher chance of having too much red blood (hematocrit >50%).
- 3No more heart problems, sleep apnea, or deaths than the placebo group.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
The journals of gerontology. Series A, Biological sciences and medical sciences
Year
2005
Authors
O. Calof, Atam B. Singh, Martin L. Lee, A. Kenny, R. Urban, J. Tenover, S. Bhasin
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.