Table 2.

Impact of Age on Total Testosterone Levels Measured by LC-MS or GC-MS) from Bhasin et al (29)

Age (years)20-2930-3940-4950-5960-6970-7980+
Mean (ng/dl)713656617611569567570
95thpercentile110410841001105996510971079
5th percentile375343304286276254238
N22066087278849328926

To convert total testosterone levels to nmol/L multiply by 0.0347

From: Laboratory Assessment of Testicular Function

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