^^ this is far from being a conclusive study,this is not a scientific study, it is a statistical study /...there are no conclusive statistical study on cancer and trt,..
in medicine you will always always see for example studies saying that product x will cause this and that , and other studies contradicting it ...I myself conducted a study on the effects of low frequency electromagnetic fields and cancer and read hundreds of studies on that, while most statistics confirmed the relationship, some studies suggested that emf are good for you! but logically speaking and engineering speaking we are bound to think that emf are harmful.
what i want to say is that there are things that are logical and do not need statistical studies. in fact in many cases the theory and logical cause and effects are formulated before going into a study, the study is just a statistics that will absolutely confirm the theory,... and in many cases a study to absolutely confirm the theory cannot be done on humans and/or require years and years of observation and thus is impossible.
TRT domain is still under debate and still unclear. some would take the risk and some would not. some doctors believe in it but still most don't.