| 1 | 2006 | Kim et al. [39] | Gender identity (TGD) | Psychological burdens (BDI, SADS, SES, FACES-III) | Offline survey | TGD, N=43, 49 matched non-transsexual | High depression burden, social avoidance and distress, low self-esteem scale, family adaptability and cohesion. |
| 2 | 2018 | Lee et al. [50] | Experiences of and barriers to transition-related healthcare | Gender affirming care | RCP2* online survey | TGD, N=278 | Barrier: cost, negative experiences in healthcare settings, lack of specialized healthcare professionals and facilities, and social stigma against TGD. |
| 3 | 2019 | Lim et al. [41] | Demographics | Gender identity-related characteristics | Hospital medical record review | TGD, N=54 | 20% had mental disorder other than gender dysphoria. |
| 4 | 2020 | Lee et al. [44] | Internalized transphobia | Depressive symptoms, suicidal ideation, and suicide attempts. | RCP2 online survey | TGD, N=207 | Depressive symptom, suicidal ideation and attempts. |
| 5 | 2020 | Lee et al. [40] | Gender identity (TGD) | Physical health, mental health | RCP2 online survey | TGD, N=255 | Depressive symptom, suicidal ideation. |
| 6 | 2021 | Yun et al. [52] | Cross-sex hormone | Body composition, bone mineral density, muscle strength | Hospital medical record review | TGD women, N=11 | Increase fat mass, decrease in overall lean body mass and handgrip strength. |
| 7 | 2021 | Lee et al. [46] | Public Bathroom-Related Stressors | Depressive Symptoms | RCP3† online survey | TGD, N=557 | Depressive symptoms. |
| 8 | 2022 | Lee et al. [43] | Discrimination due to TGD identity | Healthcare avoidance and delay | RCP2 online survey | TGD, N=244 | Healthcare avoidance and delay. |
| 9 | 2022 | Eom et al. [49] | Discrimination due to TGD identity | Sleep problems | RCP3 online survey | TGD, N=583 | Sleep problems. |
| 10 | 2022 | Choo et al. [34] | Discrimination due to TGD identity | Dymptoms of depression and anxiety | RCP2 online survey | TGD, N=269 | Depressive and anxiety symptoms. |
| 11 | 2023 | Lee et al. [45] | Gender identity change effort | Depression, PTSD, suicide attempts | RCP3 online survey | TGD, N=566 | 11.5% Gender identity change effort experience, more depression, panic disorder, suicide attempt. |
| 12 | 2023 | Lee et al. [71] | Transgender-specific COVID-19-related stressors | Past-week depressive symptoms | RCP3 online survey | TGD, N=564 | 30% TGD-specific COVID-19 related stressor experience and more depressive symptoms. Barrier to gender affirming care: economic hardship, limited access to hospital. |
| 13 | 2023 | Kim et al. [42] | Discrimination due to TGD identity | Healthcare avoidance and delay | RCP2 online survey | TGD, N=190 | 53.7% experienced anti-transgender discrimination at initial and one year follow up survey, and they experienced more non-transition-related healthcare avoidance and delay. |
| 14 | 2023 | Kim et al. [53] | Demographics | Gender identity disorder, intersex | Administrative data (HIRA) | TGD, N=8,602 | For 15 years (2007-2021), 8,602 people who received the F64 codes (gender identity disorder), 45 people diagnosed intersex. |
| 15 | 2024 | Eom et al. [48] | Situational avoidance | Mental health (1week depression, 2week anxiety) | RCP2 online survey | TGD, N=268 | 50.4% experienced avoided daily activities (public bathroom use, job application, and hospital visit) and more anxiety symptom. |
| 16 | 2024 | Oh et al. [51] | Demographics | Onset of gender incongruence | Hospital medical record review | TGD, N=337 | Mean age of onset of GI was 10.6 years (29% before age 6, 61% before age 12, and 87% before age 15), TGD lived with GI for almost 14 years before gender affirming hormone therapy. |