FAI is a useful screening tool for hyperandrogenism in women, especially in PCOS. It correlates well with free testosterone calculated by equilibrium dialysis. Note: Units for both T and SHBG must be nmol/L.
Verified
Last Review: 2026
| Range (%) | Interpretation |
|---|---|
| < 5.0 | Normal (Typical for pre-menopausal women) |
| 5.0 – 10.0 | Mildly Elevated (Suggestive of PCOS) |
| > 10.0 | Significant Hyperandrogenism |
Vermeulen A et al. • J Clin Endocrinol Metab. 1999;The study validating FAI as a surrogate for calculated free testosterone in women.
Last Comprehensive Review: 2026
Clinical Context
We think this has broad domain relevance to Free Androgen Index (FAI).
Clinical Context
We think this might be relevant to the clinical guidance for Free Androgen Index (FAI).
Clinical Context
We think this has broad domain relevance to Free Androgen Index (FAI).
