Testosterone trial aims to reduce falls in frail seniors

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Men aged 70 or over. * Living at home in their own home or in sheltered housing. * Independent walking function, possibly with a walking aid. * Able to perform the chair-stand test a maximum of 8 times in 30 seconds or Timed Up and Go (TUG) of at least 30 seconds. * There must be at least 3 symptoms of frailty or objective findings. * Serum testosterone \< 10 nmol/L as an average of 2 independent measurements at the Center for Growth and Reproduction, Rigshospitalet. Exclusion Criteria: * Known or previous prostate cancer. * Abnormally elevated serum PSA (PSA = prostate-specific antigen) corresponding to PSA \> 5 ng/ml or PSA \> 0.15 ng/ml/cc (relative to prostate size in cubic centimeters (cc)). * Hemochromatosis. * Heart diseases in the form of: Peri-, myo-, or endocarditis, angina pectoris, severe heart failure (NYHA class III and IV), severe hypertension (systolic BP \> 180 or diastolic BP \> 105 mmHg after possible antihypertensive treatment). - Resting dyspnea. * Liver (ASAT \> 2 x upper normal limit) or renal insufficiency (serum creatinine \> 200 micromol/l). * Severe intractable epilepsy or migraine. * Insulin treatment. * Previous or current bisphosphonate, fluoride, HRT, SERM, strontium, teriparatide, or more than 3 weeks of prednisolone treatment. * Joint disease with acute inflammation. * Active cancer disease, in chemo- or radiotherapy. * Bone metabolic disease except for age-related osteoporosis. * Autoimmune diseases, chronic systemic diseases (cirrhosis, AIDS, chronic renal failure). * Primary testosterone deficiency in the form of testicular dysgenesis, Klinefelter syndrome (47,XXY), 46,XX males, LH resistance, Y chromosome deletions, other sex chromosome abnormalities. * Significant abuse, mental illness, dementia, physical handicaps with inability to complete the intervention or tests, or to give informed consent. * Contraindications for testosterone undecanoate are thus included in exclusion criteria, such as the presence of liver tumors, breast carcinoma, and prostate cancer, for which trial participants will be examined before the start of the trial.