Table 2—

Association of low testosterone levels with symptoms and frequency of symptoms across various decades of age in the entire population

ParameterSymptoms
Reduced libidoEDFatigabilityDecreased muscle strengthMood changes
Hormones
    TT <8 nmol/l5872684942
    TT 8–12 nmol/l5071644960
    TT >12 nmol/l (control)4868544349
    BT <2.5 nmol/l6278645050
    BT 2.5–4 nmol/l4972634850
    BT >4 nmol/l (control)4765574352
    cFT <0.255 nmol/l6474634550
    cFT >0.255 nmol/l (control)4865574753
Age
    <40 years3030531538
    40–49 years4055482745
    50–59 years5667684860
    60–69 years4781615454
    >69 years6380525433
  • Data are %. BT, bioavailable testosterone; cFT, calculated free testosterone; TT, total testosterone.