Post- trial survey
This optional survey was answered by 71% of participants (n = 10) and their partners (n = 10). Of these, 70% of participants and 60% of their partners correctly determined when the participant was on the testosterone arm of the study. From the participant perspective, this was because of perceived changes in libido (n = 1), energy (n = 3) or both (n = 2), although one participant did not notice either of these. Partners also noted changes in libido (n = 1), energy (n = 1) or both (n = 1). The remainder did not report any changes (n = 3). Many of the participants (n = 6) and partners (n = 7) discussed these changes together which may have led to some unintentional unblinding.