Abstract
Subnormal levels of testosterone are associated with significant negative health consequences, with higher risks of all-cause and cardiovascular mortality. The numbers of studies reporting on the benefits of normalisation of testosterone is increasing but longer-term data on (elderly) men receiving testosterone treatment are almost nonexistent. In this single-centre, cumulative, prospective, registry study, 115 hypogonadal men (mean age 59.05years) received injections with testosterone undecanoate in 12-week intervals for up to 10years. Waist circumference, body weight and mean BMI dropped progressively with statistical significance versus previous year for 7years and, respectively, 8years for weight and body mass index. Similarly, fasting glucose displayed a significant decrease after the first year continuing to decrease thereafter. A decline in HbA(1c), from 6.4% to 5.6% (mean <6%), was observed from year 2 on, together with a decrease in the ratio of triglycerides:high-density lipoprotein (HDL), a surrogate marker of insulin resistance, with an increase in HDL levels. The total cholesterol:HDL ratio and non-HDL cholesterol declined significantly. A decrease was also observed in systolic and diastolic blood pressure, with a decrease in levels of the inflammation marker C-reactive protein. No major adverse cardiovascular events were observed throughout the study.