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Background: High quality data pertaining to the size of the transgender and gender diverse (TGD) population are scant, however, several recently published studies may provide more reliable contemporary estimates. Aims: To summarize the estimated number and proportion of TGD individuals overall and across age groups, based on most accurate data. Methods: This systematic review focused on recent studies (published from 2009 through 2019) that utilized sound methodology in assessing the proportion of TGD people in the general population. Publications were included if they used clear definitions of TGD status, and calculated proportions based on a well-defined sampling frame. Nineteen eligible publications represented two broad categories of studies: those that used data from large health care systems; and those that identified TGD individuals from population surveys. Results: Among health system-based studies, TGD persons were identified using relevant diagnostic codes or clinical notes. The proportions of individuals with a TGD-relevant diagnosis or other recorded evidence ranged between 17 and 33 per 100,000 enrollees. In population surveys TGD status was ascertained based on self-report with either narrow or broad definitions. The survey-based estimates were orders of magnitude higher and consistent across studies using similar definitions. When the surveys specifically inquired about transgender identity, the estimates ranged from 0.3% to 0.5% among adults, and from 1.2% to 2.7% among children and adolescents. When the definition was expanded to include broader manifestations of gender diversity, the corresponding proportions increased to 0.5-4.5% among adults and 2.5-8.4% among children and adolescents. Upward temporal trends in the proportion of TGD people were consistently observed. Conclusions: Current data indicate that people who self-identify as TGD represent a sizable and increasing proportion of the general population. This proportion may differ, depending on inclusion criteria, age, and geographic location, but well-conducted studies of similar type and design tend to produce comparable results.

Due to the COVID-19 pandemic, access to medical care is restricted for nearly all non-acute conditions. Due to their status as a vulnerable social group and the inherent need for transition-related treatments, transgender people are assumed to be affected particularly severely by the restrictions caused by the COVID-19 pandemic. As an ad hoc collaboration between researchers, clinicians and 23 community organizations, we developed a web-based survey in German that was translated into 26 languages. Participants were recruited via community sources, social media channels, and snowball sampling since May 2020. The present sample is based on the data collected until August 9, 2020. We assessed demographical data, health problems, risk factors, COVID-19 data (e.g., contact history), and the influence of the COVID-19 pandemic on access to transgender health care services. To identify factors associated with the experience of restrictions, we conducted multiple logistic regression analysis. 5267 transgender people from 63 upper-middle-income and high-income countries participated in the study. Over 50% of the participants had risk factors for a severe course of a COVID-19 infection and were at a high risk of avoiding COVID-19 treatment due to the fear of mistreatment or discrimination. Access to transgender health care services was restricted for 50% of the participants. Male sex assigned at birth and a lower monthly income were significant predictors for the experience of restrictions to health care. 35.0% reported at least one mental health condition and 3.2% have attempted suicide since the beginning of the COVID-19 pandemic. Transgender people suffer under the severity of the pandemic due to the intersections between their status as a vulnerable social group, their high number of medical risk factors, and their need for ongoing medical treatment. The COVID-19 pandemic can potentiate these vulnerabilities, add new challenges for transgender people, and, therefore, can lead to devastating consequences, like severe physical or mental health issues, self-harming behavior, and suicidality. [ABSTRACT FROM AUTHOR]