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

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.

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Key information

Conditions

Testosterone Androgens Congenital, Hereditary, and Neonatal Diseases and Abnormalities Endocrine Gland Neoplasms Endocrine System Diseases Genetic Diseases, Inborn Multiple Endocrine Neoplasia Multiple Endocrine Neoplasia Type 1 Neoplasms Neoplasms by Site Neoplasms, Multiple Primary Neoplastic Syndromes, Hereditary

Age range

18 year–90 year

Sex eligibility

All sexes

Study type

Observational

Primary location

CHU Amiens

Amiens, 80480, France

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

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

Exclusion criteria

insufficient sample
sample not send for RIA

Treatment and study plan

blood withdrawal

Biological

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

Primary outcomes

Concordance between RIA and calculated testosterone level

Time frame: 2 years

Concordance between RIA and calculated testosterone level

Sponsors and collaborators

Lead sponsor

Centre Hospitalier Universitaire, Amiens

Other

Registry information

Acronym: TESTOBIO

Important dates

Study start: 2021
Primary completion: 2023
Study completion: 2023
First posted: Mar 19, 2021
Registry last updated: Jun 12, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

Published trials that share one or more normalized conditions with this study.

Completed