Characteristic N %
Age (N=479)
16 – 25 192 40.3
26 – 35 190 39.7
36 – 45 62 12.9
46 – 55 25 5.2
56 – 65 9 1.9
66 – 75 1 0.2
Limited Gender Category (N=486)
Man/Trans man 373 76.8
Non-binary 113 23.3
Testosterone Formulation (N=486)*
Testosterone undecanoate (Reandron) 358 73.7
Testosterone enanthate (Primoteston depot) 38 7.8
Testosterone esters (Sustanon 250) 10 2.1
Testosterone 1% gel (Testogel) 62 12.8
Testosterone 2% gel (Testavan) 10 2.1
Testosterone 5% cream (Androforte 5) 11 2.3
Testosterone 2% cream (Androforte 2) 1 0.2
Other 3 0.6
Self-Reported Testosterone Dosage (N=486)
Full dose 430 87.7
Half dose 33 6.8
Quarter dose 9 1.9
Other (e.g., change in dosage) 14 3.7
Self-reported Testosterone Blood Concentrations nmol/L (N=144)
0.0 – 4.9 5 3.5
5.0 – 9.9 18 12.5
10.0 – 14.9 38 26.4
15.0 – 19.9 35 24.3
20.0 – 24.9 23 16.0
25.0 – 29.9 14 9.7
30.00+ 11 7.6
Consistency of testosterone use (N=485)
Consistent use since starting 426 87.8
Regularly stop and start use 10 2.1
Other (e.g., change in dosage or formulation) 46 9.5
Unsure/Prefer not to say 3 0.6