“The trials’ results indicate that, for older men with low sexual function, testosterone treatment can contribute to improved function,” said Evan Hadley, ., director of NIA’s Division of Geriatrics and Clinical Gerontology. “In contrast, though, the results don’t indicate that testosterone treatment for older men with low walking ability or vitality will improve these conditions to a great extent. Additional trial arms tested effects on other aging-related outcomes, and we are looking forward to their results to help provide further insights into testosterone use in older men.” Older men should consult their physicians if considering a testosterone treatment, Hadley emphasized.
Meta-analyses of placebo-controlled trials suggest that testosterone therapy in physiological doses is significantly associated with increased haematocrit, reduced high-density lipoprotein cholesterol and prostatic symptoms. 29 , 30 If prostate cancer has been excluded, there appears to be no increased risk of induction by testosterone therapy. There is inconsistent evidence regarding the risk of cardiovascular events. 29-31 A recent meta-analysis suggested increased cardiovascular risk and reported publication biases. 32 Long-term safety data are lacking, but recent reports more strongly suggest an increased risk of cardiovascular events in older men. 3 , 4 This has prompted the Endocrine Society to issue a warning statement. 5 The results and safety of long-term prospective controlled trials of testosterone therapy are awaited.