Effects of treatment versus psychotherapy on mental health of transgender people Has any reliable study been done to compare mental health (e.g. depression or suicide rate) of transgender people before and after procedures (hormone or surgery) intended to change their bodies to have characteristics that match their gender identity compared with psychological therapy intended to try and make them more comfortable with their biological sex?

I have heard some people claim that John's Hopkins used to perform sex-change procedures but stopped after failing to find it benefiting the mental health of those who they were performed on. But I have also heard people claim that these treatments really do cause a practical improvement in the mental health of transgender people. I'm not sure who, if either side or both, to trust.

Please avoid political discussion or debate on whether a transgender person can actually switch sexes or if it's a delusional disorder, even if your opinion on that might inform what you think the proper way of treating transgender people is. I'm just curious about reliable data on the psychological effects of the alternatives.
Johns Hopkins did stop doing gender reassignment surgery and one of their psychiatrists apparently says that


  The suicide rate among transgendered people who had the surgery is 20 times higher


He also apparently says that


  transgenderism is a “mental disorder” that merits treatment, that sex change is “biologically impossible,” and that people who promote sexual reassignment surgery are collaborating with and promoting a mental disorder.


According to this website, the Johns Hopkins psychiatrist involved has a history of speaking out against transgendered people.

On the flip side, the DSM-5 (5th Edition of the Diagnostics and Statistics Manual) in 2013 added Gender Dysphoria as the new term for Gender Identity Disorder in order to try and prevent stigma; and current case reports offer no evidence that psychotherapy offers total and long-standing change of gender dysphoria.