Summary
This content was automatically synthesized by Credo's AI models directly from the original source text.
AI summaries can make mistakes — double-check important details against the original source.
1 Sample Definition And Size
Not applicable; the paper is a review article (no primary sample or sample size reported).
2 Study Type
Review.
3 Conflicts Of Interest
Not reported in the abstract or PubMed entry.
4 Results Summary
The review emphasizes that circulating total and free testosterone levels vary substantially due to biological and measurement factors. It recommends measuring total testosterone in a fasting morning sample using a reliable assay such as liquid chromatography–tandem mass spectrometry in a laboratory certified by an accuracy-based benchmark. Free testosterone should be measured in men with suspected alterations in binding protein concentrations or when total testosterone is near the lower or upper limit of the normal male range. No specific statistics (e.g., p-values, effect sizes, confidence intervals) are provided in the abstract.