The original version of this article inadvertently contained the wrong version of Fig. 4 and the descriptives derived from it. Please, see the correct version of Fig. 4 and the descriptives below. The mean percentage per year of diagnosed adolescents that started with affirmative medical treatment (puberty suppression and/or gender-affirming hormones) is 90.6%, the range is 70%–100%. This inaccuracy has no further impact on the article because the correct percentages were used in all analyses. The answer to one of the research questions: ’Has the number of GD diagnosed adolescents who continue with medical treatment changed over time?’ is therefore still correct. (Figure presented).