Qi Zhang1, Michael Goodman1, Noah Adams2, Trevor Corneil3, Leila Hashemi4, Baudewijntje Kreukels5, Joz Motmans6, Rachel Snyder1, Eli Coleman7. 1. Department of Epidemiology, Emory University Rollins School of Public Health, Atlanta, Georgia, USA. 2. Ontario Institute for Studies in Education, University of Toronto, Toronto, Canada. 3. Department of Epidemiology, Biostatistics and Public Health Practice University of British Columbia School of Population and Public Health, Vancouver, Canada. 4. VA Greater Los Angeles Health Care System, Los Angeles, California, USA. 5. Department of Medical Psychology Amsterdam University Medical Centers, location VU, Amsterdam, Netherlands. 6. Department of Languages and Cultures, Ghent University, Ghent, Belgium. 7. Department of Family Medicine and Community Health University of Minnesota Medical School, Minneapolis, MN, USA.
Abstract
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.
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.
Authors: Erin R Ewald; Paul Guerino; Christina Dragon; Alison M Laffan; Zil Goldstein; Carl Streed Journal: LGBT Health Date: 2019-05-14 Impact factor: 4.151
Authors: Michael R Kauth; Jillian C Shipherd; Jan Lindsay; John R Blosnich; George R Brown; Kenneth T Jones Journal: Am J Public Health Date: 2014-09 Impact factor: 9.308
Authors: Sari L Reisner; Kerith J Conron; Laura Anatale Tardiff; Stephanie Jarvi; Allegra R Gordon; S Bryn Austin Journal: BMC Public Health Date: 2014-11-26 Impact factor: 3.295
Authors: Laura N MacMullin; Lisa M Bokeloh; A Natisha Nabbijohn; Alanna Santarossa; Anna I R van der Miesen; Diana E Peragine; Doug P VanderLaan Journal: Arch Sex Behav Date: 2020-11-13
Authors: E Coleman; A E Radix; W P Bouman; G R Brown; A L C de Vries; M B Deutsch; R Ettner; L Fraser; M Goodman; J Green; A B Hancock; T W Johnson; D H Karasic; G A Knudson; S F Leibowitz; H F L Meyer-Bahlburg; S J Monstrey; J Motmans; L Nahata; T O Nieder; S L Reisner; C Richards; L S Schechter; V Tangpricha; A C Tishelman; M A A Van Trotsenburg; S Winter; K Ducheny; N J Adams; T M Adrián; L R Allen; D Azul; H Bagga; K Başar; D S Bathory; J J Belinky; D R Berg; J U Berli; R O Bluebond-Langner; M-B Bouman; M L Bowers; P J Brassard; J Byrne; L Capitán; C J Cargill; J M Carswell; S C Chang; G Chelvakumar; T Corneil; K B Dalke; G De Cuypere; E de Vries; M Den Heijer; A H Devor; C Dhejne; A D'Marco; E K Edmiston; L Edwards-Leeper; R Ehrbar; D Ehrensaft; J Eisfeld; E Elaut; L Erickson-Schroth; J L Feldman; A D Fisher; M M Garcia; L Gijs; S E Green; B P Hall; T L D Hardy; M S Irwig; L A Jacobs; A C Janssen; K Johnson; D T Klink; B P C Kreukels; L E Kuper; E J Kvach; M A Malouf; R Massey; T Mazur; C McLachlan; S D Morrison; S W Mosser; P M Neira; U Nygren; J M Oates; J Obedin-Maliver; G Pagkalos; J Patton; N Phanuphak; K Rachlin; T Reed; G N Rider; J Ristori; S Robbins-Cherry; S A Roberts; K A Rodriguez-Wallberg; S M Rosenthal; K Sabir; J D Safer; A I Scheim; L J Seal; T J Sehoole; K Spencer; C St Amand; T D Steensma; J F Strang; G B Taylor; K Tilleman; G G T'Sjoen; L N Vala; N M Van Mello; J F Veale; J A Vencill; B Vincent; L M Wesp; M A West; J Arcelus Journal: Int J Transgend Health Date: 2022-09-06
Authors: Huyen Nguyen; Benjamin Hampel; David Garcia Nuñez; Manuel Battegay; Anna Hachfeld; Enos Bernasconi; Alexandra Calmy; Matthias Cavassini; Pietro Vernazza; Jacques Fellay; Hannes Rudolph; Michael Huber; Karoline Leuzinger; Matthieu Perreau; Alexandra Scherrer; Alban Nicolas Ramette; Sabine Yerly; Huldrych F Günthard; Roger D Kouyos; Katharina Kusejko Journal: Clin Infect Dis Date: 2022-04-28 Impact factor: 20.999