Diurnal Testosterone Concentration

Completed

Conditions studied: Testosterone Deficiency

In brief

In this case-controlled, observational study, 24 subjects will participate in a 12-hour blood collection with a single blood draw at +24 hours. 12 men will have low testosterone levels (hypogonadism) and 12 men will have normal testosterone levels. Blood samples will be drawn every 2 hours and later analyzed for total testosterone and calculated free testosterone. The primary objective of this study is to assess the degree of diurnal variation in men with testosterone deficiency.

Key facts

Study ID

NCT03091296

Run by

Men's Health Boston

People needed

24

Starts

2017-09-13

Expected to finish

2018-01-02

Last updated by the study team

2018-03-27

Who can join

Age: 18 and older, up to 46. Sex: male. Healthy volunteers: accepted.

You may qualify if…

• Men with testosterone deficiency:
• Ability to read, write, and understand English
• Male sex at birth
• Age greater than or equal to 18
• Age less than 46
• Diagnosed with testosterone deficiency prior to visit 1
• Screening testosterone concentration of less than 350 ng/dL
• Willing and able to comply with the study protocol
• Willing to provide informed consent for this study
• No previous exposure to exogenous T unless off therapy for at least 4 weeks
• Men without testosterone deficiency:
• Ability to read, write, and understand English
• Male sex at birth
• Age greater than or equal to 18
• Age less than 46
• Never diagnosed with testosterone deficiency
• Screening testosterone concentration of greater than 350 ng/dL
• Willing and able to comply with the study protocol
• Willing to provide informed consent for this study
• No previous exposure to exogenous T

You may not qualify if…

• Previous exposure to exogenous T, clomiphene citrate, or other Selective Estrogen Receptor Modulators, unless off therapy for at least 4 weeks
• Serious psychiatric disease or uncontrolled medical illness, as suspected from the history or clinical examination
• Used any sex hormones or steroidal anabolic drug supplements within 28 days before screening testosterone collection
• Incapable of giving informed consent or complying with the protocol

Where it is running

• Men's Health Boston — Chestnut Hill, Massachusetts, United States

Full record on ClinicalTrials.gov

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