Comparison Between Calculated Bioavailable Testosterone Level With Radio-immunoassay Result.

Status

Completed

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT04807231

Acronym

TESTOBIO

Enrollment

270

Registered

2021-03-19

Start date

2021-02-19

Completion date

2023-02-18

Last updated

2026-06-12

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Androgens, Testosterone

Keywords

testosterone, androgens, men, women

Brief summary

Currently, the gold standard to obtain bioavailable testosterone results is radioimmunoassay (RIA). However, this assay requires specific equipment. Giton in 2006 proposed an optimized calculation of the Vermeulen equation, the results of which seem to be well correlated with those obtained by RIA. The aim of this study is to determine if the bioavailable testosterone levels determined by both methods are similar in order to replace the usual RIA assay of bioavailable testosterone by this calculation.

Interventions

BIOLOGICALBlood withdrawal

Blood withdrawal in order to perform a bioavailable testosterone RIA (Radio-Immuno Assay).

Study design

Observational model

CASE_ONLY

Time perspective

PROSPECTIVE

Eligibility

Sex/Gender

ALL

Age

18 Years to 90 Years

Healthy volunteers

Inclusion criteria

* Every men and women aged between 18 and 90 can be included

Exclusion criteria

* insufficient sample * sample not send for RIA

Design outcomes

Primary

Measure	Time frame	Description
Concordance between RIA and calculated testosterone level	2 years	Concordance between RIA and calculated testosterone level

Countries

France

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Jun 13, 2026