Relationship Between Gonadal Function and Cardiometabolic Risk in Young Men With Chronic Spinal Cord Injury.
Shannon D Sullivan, Mark S Nash, Eshetu Tefara and 2 others
PMID 28827206WHAT IT FOUND
Young men with chronic spinal cord injury and low testosterone had higher body fat, worse cholesterol, and more insulin resistance than those with normal levels.
This links hormone deficiency to cardiometabolic risk, but does not prove low testosterone causes it.
Key findings
01Men with low free testosterone had higher 10-year cardiovascular risk scores than men with normal free testosterone, though all participants remained in the low-risk category.
02Low total and free testosterone were associated with higher body fat percentages, despite no significant differences in BMI between the groups.
03Men with low testosterone showed significantly higher insulin resistance and fasting glucose levels compared to men with normal testosterone levels.
STILL TO COME
How it was doneWhat they foundWhat it means for PTsWhat it means for OTsWhat it means for SLPs
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What it does not show
The study design is cross-sectional, meaning it measured everything at one point in time. This proves an association but cannot show that low testosterone caused the poor health markers, or vice versa. The sample size was small (58 men), which limits the statistical power to detect smaller differences. Testosterone was measured only once. Since levels fluctuate, a single morning draw may not accurately reflect a man's typical hormone status. The study excluded men with diabetes, cardiovascular disease, or those taking medications for these conditions. This means the results may not apply to the broader SCI population, who often have these comorbidities. All participants had a low Framingham Risk Score (<10%), so the absolute cardiovascular risk in this group was low despite the relative differences found.
Declared interests
The authors declared no financial conflicts of interest. The study was supported by the U.S. Government, Non-P.H.S. sources.
The easy way to misread this
Do not assume that treating low testosterone with hormone replacement therapy will automatically reduce cardiometabolic risk or improve health outcomes in men with spinal cord injury. This study only showed an association between low testosterone and poor health markers; it did not test whether treatment improves these markers, and other research suggests hormone therapy carries its own cardiovascular risks.