Quote from: Lady_Oracle on November 21, 2013, 11:38:55 PM
I found the study, fully accessible too!
http://jcem.endojournals.org/content/early/2012/10/08/jc.2012-2030.full.pdf
Thank you Lady!
It does help to know that the sample size who actually took spiro was tiny (4.8%, or 18 out of 370) and may have been comprised largely or completely of self-medicators, who were also the most likely as a group to request mammoplasty.
If I am doing my maths correctly (a big if, so feel free to correct!) the study clearly points out that self-medicators were twice as likely to request mammoplasty vs. physician directed HRT (11.5% vs 6%); and that self-medicators were three times more likely to take spiro vs. physician directed HRT (4.8% vs 1.8%); if you combine those two factors, and the fact that we are talking about a tiny sample (11% of 4.8% of ~370), the conclusion about spiro is completely unsupported. We are talking about 2 out of 370 individuals, which is not enough to draw any conclusions whatsoever. Two self medicators who took spiro requested mammoplasty, out of a total sample of all combinetrics of 370.
Any follow up study aiming to measure effects of anti-androgens should be done in the US or Canada or another country, where anti-androgens are common enough to actually be statistically relevant. As the study says, "Antiandrogens are not routinely used in the clinical protocol".
So any conclusions about anti-androgens from this study are likely to be fallacious.
It would be worth following up in a study that had equal numbers (50/50, instead of 5/95 and 2/98) of spiro vs other androgen control mechanisms.
Even though I would like to encourage ALL serious studies being done on transsexual treatments - can't be too picky about water when you reside in a desert! - this sentence made me cringe and call into question the entire study:
QuoteSpironolactone is more likely than the other, more specific antiandrogens or GnRH analogs to result in the need for breast augmentation.
If it had mentioned a 'possible correlation, I would agree. But a 'result in'? Nothing in this study would indicate causality, or have nearly the numbers needed to make any kind of conclusion that strong.
Interestingly enough, the breast bud fusion conjecture appears to have been misread initially by the doctor quoted in the OP.
The study does not posit that Spiro causes increased breast bud fusion; rather, it posits that self-medication, and any other treatments that result in estrogen levels that are too high, can result in sub-optimal breast growth, projecting from the experience of natal females who are exposed to too rapid introduction of estrogen during puberty. This is stated as a conjecture, not as a result of the study.