This piece is a very brief note in the Journal of Psychosomatic Research, June 2004.
In Poland, there are three times as many trans men (born female) as trans women (born male). This is different from the West,* where there are more trans women than trans men.
Because this is just a brief note, it is not clear how they are measuring gender dysphoria. The authors refer to transsexuals they examined, so it is likely that they are talking about people who transitioned.
There is no discussion here of the age or sexual orientation of the people in this study.
The exact numbers in the study were “1454 transsexuals of whom 1125 were F/M transsexuals and only 329 M/F.”
In other words, in Poland, about 77% of transgender people who seek treatment are trans men.
*By the West, I assume they mean Western Europe, the USA, and Canada.