The free androgen index is inaccurate in women when the SHBG concentration is low.
Brian G KeevilJo AdawayTom FiersPaolo MoghettiJean-Marc KaufmanPublished in: Clinical endocrinology (2018)
The FAI is not a reliable indicator of free T when the SHBG concentration is low and would give misleading information in a large number of women being investigated for hyperandrogenism.