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Waist size beats complex metabolic scores for detecting low testosterone in Klinefelter syndrome. A study of 328 men found that waist circumference outperformed measures like the triglyceride-glucose index in identifying biochemical hypogonadism. Adding waist circumference to age significantly boosted diagnostic accuracy, making it a simple, low-cost tool for routine clinical use.
A new study suggests that something as simple as a waist measurement could be more useful than complex metabolic scores for identifying testosterone deficiency in men with Klinefelter syndrome (KS) — the most common sex chromosome condition in men and a leading genetic cause of male infertility.
Researchers reviewed records of 328 men with genetically confirmed KS who had not yet received testosterone replacement therapy. Nearly two-thirds (64.9%) had low testosterone levels. Among the metabolic and anthropometric measures tested, waist circumference (WC) came out on top, outperforming the lipid accumulation product and the triglyceride-glucose index. Combining WC with age further improved diagnostic accuracy.
By the Numbers:
Why it matters: WC is cheap, fast, and universally available — no lab work required. For clinicians managing men with KS, it offers a practical first-line tool to flag those most likely to need further hormonal evaluation.
