Asa Radix

• MD, PhD MPH
• HIV specialist at Callen-Lorde Community Health Center

There are over one million transgender and gender diverse adults in the United States, some of whom may decide to undergo medical or surgical interventions. Hormone therapy and gender-affirming surgeries help align an individual’s physical characteristics with their gender identity. Head and neck surgeries are especially important as facial feature...

Objective Despite increasing incidence of genital gender-affirming surgery (GGAS), there is no systematic method of evaluating patient perspectives. The objective of this study is to elucidate transgender and non-binary patient perspectives on gender-affirming phalloplasty/metoidioplasty via structured focus groups and determine convergent themes a...

Importance In the US, transgender, nonbinary, and gender diverse (TGD) adults have high rates of depression. Gender-affirming hormone therapy (GAHT) is associated with improved mental health outcomes, yet existing US studies have short follow ups and lack sample diversity. Objective To evaluate the use of GAHT delivered in primary care as an inter...

Background Clinical characteristics and outcomes in patients with mpox treated with tecovirimat are not well described. Methods We requested retrospective deidentified data from healthcare systems in New York City (NYC) with >50 tecovirimat prescriptions. Patients with probable or confirmed mpox initiating tecovirimat from May–December 2022 were i...

This exploratory study investigated the impact of the COVID-19 pandemic on stress biomarkers and allostatic load for Black and Latina transgender women living with HIV (BLTWLH), as well as COVID-19 infection, hospitalization, and vaccination status. LITE Plus is a longitudinal cohort study of BLTWLH designed to identify pathways linking biopsychoso...

Introduction Pre-exposure prophylaxis (PrEP) use among transgender women in the U.S. has not reached levels optimal to change the trajectory of the HIV epidemic owing to multilevel barriers. Long-acting injectable PrEP received Food and Drug Administration approval in 2021 and may potentially address some of the barriers experienced in initiating a...

HIV incidence among transgender women remains high and disproportionately impacts young, Black, and Latina transgender women. Data on preferred PrEP modalities among this population are limited. Participants in The LITE Cohort completed a survey module on PrEP modality preferences during 24-month study visits. We summarized ranked preferences based...

After a decade of implementation in the US, PrEP uptake remains underutilized by communities that would greatly benefit from it. Event-Driven (ED) PrEP is a potential avenue to increase uptake, however very little is known about its use in the US. We analyzed data derived from Together 5000, an internet-based U.S. national cohort of Sexual and Gend...

Advances in antiretroviral therapy (ART) have made it possible for persons with human immunodeficiency virus (HIV) to live a lifespan approaching that of people without HIV, without progressing to AIDS or transmitting HIV to sexual partners or infants. There is, therefore, increasing emphasis on maintaining health throughout the lifespan. To receiv...

Background: Transgender women (TW) are highly burdened by HIV. There is increasing interest in digital (i.e., through internet-based interfaces) HIV research; yet few studies have assessed potential biases of digital compared to site-based data collection. This study examined differences in characteristics between TW participating via site-based v...

Ever since the Cass Review was released in April—an evaluation by the United Kingdom’s National Health Service that has led to a ban on pubertysuppressing medication for transgender and gender diverse (TGD) youth—there has been criticism of the assessment and its recommendations, and concern about how it could be leveraged to more broadly affect pu...

Our study assessed the association between methamphetamine (i.e., crystal meth, CM) use and awareness and interest in event-driven (ED) PrEP among HIV-negative and those with unknown serostatus cisgender males and transgender people. We performed log-binomial regression analysis to predict awareness (i.e., having heard of ED PrEP) and being interes...

Background Hepatitis C virus (HCV) reinfection rates are substantially higher than primary infection rates among men who have sex with men (MSM) with human immunodeficiency virus (HIV) in European cohorts. The behaviors mediating this high rate of transmission among MSM are poorly characterized. Methods We performed a prospective cohort study in N...

INTRODUCTION Efforts to improve PrEP uptake among gay men, transgender women, and Black cisgender women are evident across the US, responding to epidemiologic data showing a disproportionate HIV burden in these communities. However, transgender men and other trans masculine people (TMSM)—those assigned female at birth who identify otherwise and hav...

Loss to follow-up (LTFU) in high-resolution anoscopy (HRA) programs jeopardizes the procedure’s potential to help prevent anal cancer. We explored quality improvement factors to understand how to address this LTFU. Using the transtheoretical COM-B Model (Capability, Opportunity, Motivation, and Behavior) and a sequential explanatory mixed-methods d...

Transgender women of color (TWOC) experience high rates of police violence and victimization compared to other sexual and gender minority groups, as well as compared to other White transgender and cisgender women. While past studies have demonstrated how frequent police harassment is associated with higher psychological distress, the effect of neig...

Background Transgender men and transmasculine youth are at high risk for acquiring HIV. Growing research on transgender men demonstrates increased HIV risk and burden compared with the general US population. Despite biomedical advancements in HIV prevention, there remains a dearth of evidence-based, sexual health HIV prevention interventions for yo...

Background Among communities with elevated HIV burden, increased uptake of PrEP, including long-acting injectable (LAI) PrEP, could lower HIV incidence. Lack of data on LAI PrEP interest among transgender women in the US has limited scientific understanding of the potential impact of LAI PrEP on new infections within transgender communities. Our ob...

BACKGROUND In the United States (US), transgender women are disproportionately impacted by HIV and prioritized in the national strategy to end the epidemic. Individual, interpersonal, and structural vulnerabilities underly the HIV acquisition among transgender women, and fuel syndemic conditions, yet no nationwide cohort monitors their HIV and othe...

Background In the United States, transgender women are disproportionately impacted by HIV and prioritized in the national strategy to end the epidemic. Individual, interpersonal, and structural vulnerabilities underlie HIV acquisition among transgender women and fuel syndemic conditions, yet no nationwide cohort monitors their HIV and other health...

To estimate the effect of neighborhood-level modification on the efficacy of the MyPEEPS Mobile intervention on the reduction of condomless anal sex acts among same-sex attracted adolescent men. A series of generalized linear mixed model was used to examine if the effect of the MyPEEPS Mobile intervention on condomless anal sex acts was moderated b...

Background: Policy protections for transgender adults in the United States are consistently associated with positive health outcomes. However, studies over-represent non-Latinx White transgender people and obscure variation in policies' intended goals. This study examined racial differences in the relationship between transgender-related policies...

The prevalence and correlates of food insecurity—the unavailability of food and limited access to it—have not been adequately considered among transgender women (TW), particularly alongside other health-related conditions burdening this population, such as HIV infection. This study examined the prevalence and correlates of food insecurity among TW....

Cisgender men are diagnosed with HIV at a rate four times greater than cisgender women, with 71% of infections attributed to male-male sexual contact. Despite expanding accessibility, pre-exposure prophylaxis (PrEP) for HIV prevention is initiated by only 30% of people with PrEP indications. Five focus groups with 42 young men who have sex with men...

Background Transgender women (TW) experience significant inequities in healthcare access and health disparities compared to cisgender populations. Access to non-transition related healthcare is understudied among TW. We aimed to assess the association between access to care and gender minority stress and resilience factors among TW living with and...

BACKGROUND Transgender men and transmasculine youth are at high risk for acquiring HIV. Growing research on transgender men demonstrates increased HIV risk and burden compared with the general US population. Despite biomedical advancements in HIV prevention, there remains a dearth of evidence-based, sexual health HIV prevention interventions for yo...

In this literature overview, we share with the reader challenges faced by LGBTQ + individuals pursuing medical education, from undergraduate to postgraduate training. The LGBTQ + acronym has evolved to encompass the diverse spectrum of sexual orientation and gender identities. Recently, the term "Sexual and Gender Minority" (SGM) has emerged as an...

Background Data on the epidemiology of sexually transmitted infections (STIs) among transgender women (TGW) with and without human immunodeficiency virus (HIV) are limited. Methods We analyzed baseline data collected from a cohort of adult TGW across 6 eastern and southern US cities between March 2018 and August 2020 (n = 1018). Participants compl...

Purpose Transgender and gender diverse (TGD) adults are disproportionately affected by suicide. Social support and connection to the broader TGD community may help lower TGD adults’ odds of having a suicide attempt (SA). The current study examined whether baseline levels of social support and community connectedness were associated with TGD adult’s...

Introduction Transgender women in the United States experience high HIV incidence and suboptimal Pre‐exposure prophylaxis (PrEP) engagement. We sought to estimate PrEP initiation and discontinuation rates and characterize PrEP discontinuation experiences among a prospective cohort of transgender women. Methods Using a sequential, explanatory, mixe...

Background: Transgender persons are disproportionately affected by HIV, but preexposure prophylaxis (PrEP) use has been low in this population. Clinical encounters for gender-affirming hormone therapy (GAHT) provide opportunities for HIV prevention. Objective: To estimate the number of commercially insured transgender women (TGW) and transgender...

In the United States, it is estimated that 0.3% of Americans aged 65 and older, or almost 172,000 individuals, identify as transgender. Aging comes with a unique set of challenges and experiences for this population, including health care disparities, mental health concerns, and social isolation. It is crucial for clinicians to use a patient-center...

Introduction: Despite their dynamic, socially constructed, and imprecise nature, both race and gender are included in common risk calculators used for clinical decision-making about statin therapy for atherosclerotic cardiovascular disease (ASCVD) prevention. Methods and Materials: We assessed the effect of manipulating six different race-gender ca...

Transgender and gender diverse (TGD) adults in the U.S. experience health disparities, including in anogenital sexually transmitted infections (STI). Gender-affirming hormone therapy (GAHT) is known to be medically necessary and improve health. Few studies have assessed the effect of GAHT on STI diagnoses. To evaluate the effect of GAHT delivered i...

Obesity is a complex and largely preventable disease that is an enormous burden to patient health and to the healthcare system. Lesbian, gay, bisexual, transgender, and queer (LGBTQ) patients and their healthcare providers should be aware of their personal risks and causes of weight gain and obesity. Sensitive, comprehensive, and competent LGBTQ pr...

Purpose Transgender and gender diverse (TGD) adults are disproportionately affected by suicide. Social support and connection to the broader TGD community may help lower TGD adults’ odds of having a suicide attempt (SA). The current study examined whether baseline levels of social support and community connectedness were associated with TGD adult’s...

Introduction Existing literature suggests that transgender women (TW) may be at high risk for adverse mental health due to stress attributed to combined experiences of stigma and complex social and structural vulnerabilities. Little research has examined how these co‐occurring experiences relate to mental health. We aimed to test a theoretically dr...

Research regarding the impact of racism on stress among young men who have sex with men (YMSM) is sparse. Secondary data were assessed from a 2018-2020 national mHealth prevention trial for YMSM aged 13-18 years (N = 542). Linear regression models examined associations between perceived stress and interpersonal and vicarious racism, adjusting for c...

Background Sexual and gender minority (SGM) persons are at a higher risk for some cancers and may have poorer health outcomes as a result of ongoing minority stress, social stigma, and cisnormative, heteronormative healthcare environments. This study compared patient and provider experiences of affirming environmental and behavioral cues and also e...

This study aimed to develop a pair of scales to assess impact of health education on patient- and provider-reported experiences that could signal a welcoming cancer care environment for sexual and gender minority (SGM) patients. Both scales assessed clinical environment and clinician behaviors. The provider-facing scale also assessed objective know...

Introduction Approximately 2% of the U.S. population identifies as transgender, and transgender people experience disproportionate rates of cardiovascular disease mortality. However, widely used cardiovascular disease risk estimators have not been validated in this population. This study sought to determine the impact on statin therapy recommendati...

Background Epidemiological monitoring of HIV among transgender women is minimal despite prioritisation of this group in the US National HIV/AIDS Strategy (2022–2025). We aimed to estimate HIV incidence in a multisite cohort of transgender women in the eastern and southern USA. Participant deaths were identified during follow-up; thus, we felt it wa...

Gender incongruence describes a condition in which an individual's gender identity does not align with their sex assigned at birth, based on anatomic characteristics. Individuals with gender incongruence may request surgical interventions, and gender-affirmation surgery plays an important role for these individuals. The basis of care derives from p...

Transgender and gender-diverse (TGD) patients experience a greater burden of health disparities compared with their heterosexual/cisgender counterparts. Some of the poorer health outcomes observed in these populations are known to be associated with the prevalence of implicit bias, bullying, emotional distress, alcoholism, drug abuse, intimate part...

Transgender women living with HIV face significant barriers to healthcare that may be best addressed through community-centered interventions holistically focused on their HIV-related, gender-related, and other important needs. Community health ambassador (CHA) interventions (education and training programs designed to engage communities and commun...

Studies on HIV self-testing (HIV-ST) have been limited to adults (age 18+). The study assessed use of HIV-ST among a diverse group of young men who have sex with men (YMSM) in the United States (US) and assessed differences in uptake by demographic characteristics and requirements for parental consent. This study demonstrated feasibility of HIV-ST...

Background: Health disparities in lesbian, gay, bisexual, transgender, queer and other sexual and gender minority (LGBTQ+) individuals are well documented, and there is a dearth of primary care providers (PCPs) with the knowledge, skills, and attitudes to sensitively care for this diverse population. Purpose: The purpose of this research study w...

Gender-affirming care for transgender and gender diverse people should be inclusive, community led and evidence informed to support mental health and wellbeing.

Transgender and non-binary (TGNB) individuals often experience gender dysphoria. TGNB individuals with gender dysphoria may undergo genital gender-affirming surgery including vaginoplasty, phalloplasty, or metoidioplasty so that their genitourinary anatomy is congruent with their experienced gender. Given decreasing social stigma and increasing cov...

Objective: Accumulating evidence demonstrates that gender affirming hormone therapy (GAHT) improves mental health outcomes in transgender persons. Data specific to the risks associated with GAHT for transgender persons continue to emerge, allowing for improvements in understanding, predicting, and mitigating adverse outcomes while informing discus...

Transgender and gender-diverse (TGD) people are disproportionately impacted by incarceration, interpersonal violence, HIV and other sexually transmitted infections, substance use disorders, and suicidality. Little is known about successful approaches to improve health outcomes for TGD individuals impacted by incarceration. We review the barriers to...

Background Between May and November, 2022, global outbreaks of human monkeypox virus infection have been reported in more than 78 000 people worldwide, predominantly in men who have sex with men. We describe the epidemiological and clinical characteristics of monkeypox virus infection in cisgender (cis) and transgender (trans) women and non-binary...

Introduction: Multiple studies have demonstrated elevated incidence and prevalence of HIV among transgender women; however, few studies have been conducted among transmasculine individuals. HIV prevalence among transgender men in the United States is estimated to be 0-4%; however, there have not been any US studies examining HIV prevalence that st...

HIV-related stigma and medical mistrust are significant challenges to addressing HIV inequities among gay, bisexual, and other men who have sex with men (MSM). HIV-related stigma is associated with high levels of medical mistrust, but there is limited knowledge regarding the mechanisms that link these variables. We examined the potential mediating...

The COVID-19 pandemic has disrupted sexual health services among those most vulnerable to HIV acquisition, such as adolescent men who have sex with men (AMSM). We sought to characterize the changes in sexual-risk behaviors, HIV and other STI testing, and pre-exposure prophylaxis (PrEP) use among a longitudinal cohort of AMSM aged 13 to 18 years bef...

Purpose: Research suggests social support may protect sexual minorities from the harmful effects of victimization that undermine mental and sexual health wellness; however, this relationship has been underexplored among a diverse youth population. We examined the association between lifetime homonegative victimization, perceived stress in the last...

Purpose of review The goal of this review is to assess the use of digital technologies to promote the health and well-being of transgender and gender diverse (TGD) people. Recent findings TGD individuals experience numerous health disparities, including low uptake of HIV prevention strategies, such as pre-exposure prophylaxis, increased HIV incide...

Importance HIV transmission rates in the United States have increased among men who have sex with men. However, there are no published randomized trials examining interventions to reduce sexual risk for HIV acquisition in males younger than 18 years. Objective To determine the efficacy of MyPEEPS Mobile, a mobile-delivered HIV prevention intervent...

Background Transgender and gender diverse (TGD) individuals disproportionately experience disparate health outcomes compared to their cisgender peers. This study aimed to collect qualitative data from a sample of TGD community health center patients on health research priorities to inform future TGD-centered research in the field of TGD health. Me...

Gender-affirming hormones have been shown to improve psychological functioning and quality of life among transgender and nonbinary (trans) people, yet, scant research exists regarding whether and why individuals take more or less hormones than prescribed. Drawing on survey data from 379 trans people who were prescribed hormones, we utilized multiva...

Background: Transgender healthcare is a rapidly evolving interdisciplinary field. In the last decade, there has been an unprecedented increase in the number and visibility of transgender and gender diverse (TGD) people seeking support and gender-affirming medical treatment in parallel with a significant rise in the scientific literature in this are...

This study characterized arrest, incarceration, and risk factors for incident incarceration among transgender women (TW) in the northeastern and southern United States. During semiannual study visits over 24 months in a multicenter cohort study, TW completed HIV testing and self-administered surveys. In total, 1571 TW completed baseline survey; 1,3...

Transgender and gender diverse (TGD), Black, and Latinx communities have long borne a disproportionate share of the U.S. HIV epidemic, yet these same key demographics are continually underrepresented in national PrEP prescriptions. Black, Latinx, and TGD individuals are also more likely to be uninsured, meaning that a proposed federal program to co...

Purpose: This study examined factors associated with past-year health care utilization among young gay, bisexual, and other men who have sex with men (YMSM) using Andersen's behavioral model of health service use. Methods: From 2018 to 2020, 751 YMSM (aged 13-18) recruited online and offline for the MyPEEPS mHealth HIV prevention study completed an...

Gender-affirming surgeries are increasingly common in the United States. For many transgender and gender nonbinary (TGNB) patients, gender-affirming surgery is a critical aspect of their overall health and wellness, with a significant impact on mental health and social functioning. Primary care clinicians are in a unique position to guide TGNB pati...

Purpose Adherence to pre-exposure prophylaxis (PrEP) during periods of PrEP-indication (i.e., prevention-effective adherence) is critical for preventing HIV. We sought to describe factors associated with prevention-effective adherence trajectories among transgender women (TW) to inform PrEP implementation strategies. Methods Using data from The LI...