Army testosterone screening may flag up to 26 percent with low results

A JAMA study found that mandatory testosterone screening could give up to 26 percent of active-duty US Army members a low result using the Pentagon's 300 ng/dL threshold, though true clinical hypogonadism affects at most 1 percent of men. Experts warn of unnecessary testing and overtreatment risks.

• Mean morning testosterone among soldiers was 405 ng/dL; Pentagon cutoff is 300 ng/dL
• Using the CDC cutoff of 264 ng/dL, about 15 percent would test low
• 19.5 percent of men under 30 and 33 percent of those 30+ had low levels
• Clinical hypogonadism affects at most 1 percent of men