You should read the study, their methodology for regret was only to account for people that requested a reversal: "The regret rate is defined as the number of

You should read the study, their methodology for regret was only to account for people that requested a reversal: "The regret rate is defined as the number of sex reassigned individuals at the time period when they did their first application that will later apply for reversal to the original sex" The study also did not account for suicides or being sanctioned in their regret rate.