Philip A Chan
Biographic Data
| ID | 5223510 |
|---|---|
| NAME | Philip A Chan |
| GIVEN NAMES | Philip A |
| FAMILY NAME | Chan |
| SIGNATURE | CHAN P A |
| AFFILIATIONS | Brown University |
| ORCID | 0000-0003-0964-5895 |
| VERIFIED | Yes |
| TOTAL WORKS | 58 |
| TOTAL CITATIONS | 3 |
| AUTHOR COUNT | 58 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 2007 |
| LATEST PUBLICATION YEAR | 2026 |
| H-INDEX | 1 |
Willingness-to-Pay for HIV Pre-Exposure Prophylaxis Among Men Who Have Sex with Men in the United States
Pre-exposure prophylaxis (PrEP) is highly effective for preventing HIV, but out-of-pocket costs represent a critical barrier to uptake. We conducted an online survey from May 2020 to October 2021. Gay and bisexual men who have sex with men (GBMSM) in New England recruited through social networking apps were randomly assigned to view different monthly PrEP costs ($0-$105) and asked about their willingness to pay. Among 612 participants, each $10 i…
Improving health care access in rural communities in the United States
In the United States, people living in rural communities experience significant health disparities compared to people living in urban settings. Between 14% and 19% of the population in the country lives in a rural area.1 People living in rural communities experience higher rates of morbidity and mortality due to multiple health care barriers. Challenges can include higher poverty rates, lower levels of education, lack of transportation, and gener…
Racial and ethnic differences in HIV pre-exposure prophylaxis reversal and abandonment in the United States
Daily oral pre-exposure prophylaxis (PrEP) effectively reduces HIV infection risks. However, adherence has been suboptimal across the United States (US), particularly among African Americans and Hispanic populations. We assessed racial and ethnic differences in PrEP primary non-adherence using two pharmacy-based measures: PrEP reversal (failure to pick up the first insurance-approved prescription) and PrEP abandonment (a reversed prescription not…
Characterizing Social Connectedness and Associated Mental Health Symptoms among Sexual Minority Men Enrolled in a Substance Use Recovery Support Program
Background Sexual minority men (SMM; gay, bisexual, and other men who have sex with men) report higher rates of substance use compared to other populations. Social connectedness is a critical component for promoting and maintaining recovery from substance use disorders. However, the degree of social connectedness among SMM who report substance use is largely unknown.Objectives We examined substance use, social connectedness (past 30-d participati…
“Make it more than a pill, make it an experience of health: ” Results from an open pilot intervention to retain young African American men who have sex with men in PrEP care
Uptake and retention in clinical care for pre-exposure prophylaxis (PrEP) is suboptimal, particularly among young African American men who have sex with men (MSM) in the Deep South. We conducted a two-phase study to develop and implement an intervention to increase PrEP persistence. In Phase I, we conducted focus groups with 27 young African American MSM taking PrEP at a community health center in Jackson, Mississippi to elicit recommendations fo…
Study protocol of a randomized controlled trial to assess the efficacy of the “PrEPare for Work” intervention to enhance PrEP uptake and optimize adherence for HIV prevention among male sex workers in…
ClinicalTrials.gov number NCT05736614, registered February 8, 2023
County-Level Factors Associated with Reversal of Insurer-Approved HIV Pre-Exposure Prophylaxis Prescriptions in the United States, 2018
Acceptability of HIV Prevention Approaches Among USA Faith-Based Leaders
Factors associated with suboptimal retention in HIV pre-exposure prophylaxis care among men who have sex with men
Despite the efficacy of HIV pre-exposure prophylaxis (PrEP), retention in care in the United States remains suboptimal. The goal of this study was to explore factors that lead to suboptimal retention in PrEP care for men who have sex with men (MSM) in real-world clinical settings in the United States. Trained interviewers conducted semi-structured interviews with MSM (N = 49) from three clinics who had been engaged in PrEP care in the Midwest (n …
Barriers and facilitators to HIV care engagement: Recommendations from people with HIV in rural Arkansas
PURPOSE: Little is known about factors affecting HIV care engagement and retention among rural people with HIV (PWH) in the South. About half of PWH in Arkansas reside in rural areas. The purpose of this study was to explore factors affecting engagement and retention in HIV care among PWH in rural areas of Arkansas. METHODS: We conducted an exploratory qualitative study in 2020 and completed individual interviews (N = 11) with PWH in rural counti…
Perspectives on long-acting formulations of pre-exposure prophylaxis (PrEP) among men who have sex with men who are non-adherent to daily oral PrEP in the United States
Long-acting formulations of PrEP are acceptable to MSM with suboptimal PrEP persistence and have the potential to improve PrEP persistence. However, many felt they needed more information on safety, efficacy, and use to consider these options. As these long-acting formulations are implemented, public health campaigns and clinical interventions to encourage may maximize uptake particularly among those who are not currently adherent to daily oral P…
PrEPare for Work: A Pilot Randomized Controlled Trial of an Intervention to Optimize HIV PrEP Outcomes Among Male Sex Workers
Pilot Randomized Controlled Trial of Game Plan for PrEP: A Brief, Web and Text Message Intervention to Help Sexual Minority Men Adhere to PrEP and Reduce Their Alcohol Use
Identifying HIV PrEP Attributes to Increase PrEP Use Among Different Groups of Gay, Bisexual, and Other Men Who Have Sex with Men: A Latent Class Analysis of a Discrete Choice Experiment
Characterizing HIV Syndemics and the Role of Incarceration Among Men Who have Sex with Men Presenting for Care at a Sexually Transmitted Infections Clinic
Optimizing Uptake of Long-Acting Injectable Pre-exposure Prophylaxis for HIV Prevention for Men Who Have Sex with Men
Pre-exposure prophylaxis (PrEP) is a highly effective HIV prevention tool. Long-acting injectable PrEP (LAI-PrEP) offers another opportunity to reduce HIV. However, how at-risk individuals will consider LAI-PrEP over other modes of administration is unclear. We conducted a discrete choice experiment on preferences for PrEP among a sample of N = 688 gay, bisexual, and other men who have sex with men (GBMSM). We analyzed preferences for mode of adm…
Substance Use Treatment Engagement among Men Who Have Sex with Men Who Use Stimulants in the Northeastern United States
Background Stimulant use is increasing in the United States (U.S.), especially among men who have sex with men (MSM). Objectives: We sought to ascertain barriers and facilitators to substance use treatment utilization among MSM who use stimulants in the northeastern U.S. Methods: We conducted semi-structured interviews with MSM who reported recent stimulant use. Interviews explored perceptions of and experiences with substance use treatment. We u…
Substance Use and Healthcare Utilization Across the Pre-Exposure Prophylaxis (PrEP) Care Cascade among Black and Latino Men Who Have Sex with Men
Background: Despite the documented efficacy of pre-exposure prophylaxis (PrEP) for HIV prevention, large disparities in uptake and adherence exist among Black and Latino/Hispanic men who have sex with men (BLMSM). Limited data exists among BLMSM on the impact of substance use at different stages of the PrEP Care Cascade. We examined the ways substance (alcohol, cannabis, other drug) use is related to PrEP experiences across the PrEP Care Cascade …
How Comorbidities Affect Hospitalization from Influenza in the Pediatric Population
Influenza is a contagious respiratory illness and can lead to hospitalization and even death. Understanding how comorbidities affect the severity of influenza can help clinical management. The aim of this study is to offer more information about comorbidities that might be associated with the severity of influenza in children. We used a statewide network in Rhode Island, USA, to extract data for laboratory-confirmed influenza cases among children…
Where’s the “Everyday Black Woman”? An intersectional qualitative analysis of Black Women’s decision-making regarding HIV pre-exposure prophylaxis (PrEP) in Mississippi
An effective response to PrEP implementation among Black women in the South requires developing programs to center the needs of Black women and carry out active strategies that prioritize peer advocacy while reinforcing positive and mitigating negative influences from broader social and historical contexts
Barriers and Facilitators to HIV Pre-Exposure Prophylaxis Uptake Among Men Who have Sex with Men Who Use Stimulants: A Qualitative Study
Same-Sex Marriage Laws, Provider-Patient Communication, and PrEP Awareness and Use Among Gay, Bisexual, and Other Men Who have Sex with Men in the United States
Gay, Bisexual, and Other Men Who Have Sex With Men Who Are Not on Oral PrEP may be Less Interested in Available Injectable Products than in Oral PrEP: Examining Individual-Level Determinants of Intere…
Who is using PrEP on-demand? Factors associated with PrEP use modality among Black and Hispanic/Latino emerging adults
Pre-exposure prophylaxis (PrEP) use, anticipated PrEP stigma, and bisexual identity among a Black and Hispanic/Latino sexual and gender diverse sample
Black and Hispanic/Latino sexual minority men and gender diverse (SMMGD) individuals are disproportionately impacted by the HIV epidemic. Uptake and adherence to pre-exposure prophylaxis (PrEP) is suboptimal among SMMGD Black and Hispanic/Latino individuals, but most research has approached this population as homogenous (e.g., a group operationalized as men who have sex with men). Bisexual men are less likely to disclose their sexual identity and…
Seroprevalence of Sars-CoV-2 Antibodies in Rhode Island From a Statewide Random Sample
Objectives. To characterize statewide seroprevalence and point prevalence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in Rhode Island. Methods. We conducted a cross-sectional survey of randomly selected households across Rhode Island in May 2020. Antibody-based and polymerase chain reaction (PCR)–based tests for SARS-CoV-2 were offered. Hispanics/Latinos and African Americans/Blacks were oversampled to ensure adequate represen…
Sex Workers and Syndemics: A Population Vulnerable to HIV and Covid-19
A new global database on agriculture investment and capital stock
Risk factors for HIV infection in Males who have Sex with Males (MSM) in Bangladesh
The epidemiology of HIV infection in other countries suggests that increasing rates of HIV in higher-risk populations can precede an epidemic in the general population. We review the data concerning MSM, IDU and HIV in Bangladesh from a variety of sources and propose ways to prevent HIV transmission
Prevalence and Predictors of Concurrent Sexual Partnerships in a Predominantly African American Population in Jackson, Mississippi
Preferences for HIV Pre-Exposure Prophylaxis (PrEP) Information Among Men Who Have Sex with Men (MSM) at Community Outreach Settings
Community outreach efforts to increase HIV pre-exposure prophylaxis (PrEP) utilization by at risk men-who-have-sex-with-men (MSM) first need to elucidate preferences for learning about PrEP and linking to PrEP resources. In this pilot study, we observed that among MSM recruited through community outreach, HIV sexual risk-taking was significant, yet self-perceived PrEP knowledge was low and interest in learning more about PrEP was moderate. Most p…
Individual and Partner-Level Factors Associated with Condom Non-Use Among African American STI Clinic Attendees in the Deep South: An Event-Level Analysis
Condom use and incarceration among STI clinic attendees in the Deep South
This study found a strong, independent relationship between condom use and multiple, long-term incarceration events among patients in an urban STI clinic in the Deep South. The results suggest that duration of incarceration and multiple incarcerations have significant effects on sexual risk behaviors, underscoring the deleterious impact of long prison or jail sentences on population health. Our findings also suggest that correctional health care …
Social, structural, behavioral and clinical factors influencing retention in Pre-Exposure Prophylaxis (PrEP) care in Mississippi
Pre-exposure prophylaxis (PrEP) is a biomedical intervention that can reduce rates of HIV transmission when taken once daily by HIV-negative individuals. Little is understood about PrEP uptake and retention in care among the populations most heavily impacted by the HIV epidemic, particularly among young men who have sex with men (YMSM) in the Deep South. Therefore, this study explored the structural, social, behavioral, and clinical factors that …
Defining the HIV pre-exposure prophylaxis care continuum
Pre-exposure prophylaxis (PrEP) is an effective HIV prevention strategy. There is little scientific consensus about how to measure PrEP program implementation progress. We draw on several years of experience in implementing PrEP programs and propose a PrEP continuum of care that includes: (1) identifying individuals at highest risk for contracting HIV, (2) increasing HIV risk awareness among those individuals, (3) enhancing PrEP awareness, (4) fa…
Pilot Randomized Controlled Trial of Acceptance-Based Behavior Therapy to Promote HIV Acceptance, HIV Disclosure, and Retention in Medical Care
HIV Testing Among Men Who Have Sex with Men in the Northeastern United States
The Cost and Cost-utility of Three Public Health HIV Case-finding Strategies: Evidence from Rhode Island, 2012–2014
Behavioral Changes Following Uptake of HIV Pre-exposure Prophylaxis Among Men Who Have Sex with Men in a Clinical Setting
Disclosure of HIV Serostatus and Pre-exposure Prophylaxis Use on Internet Hookup Sites Among Men Who have Sex with Men
Prevalence and Correlates of Unhealthy Alcohol and Drug Use Among Men Who Have Sex with Men Prescribed HIV Pre-exposure Prophylaxis in Real-World Clinical Settings
African American Clergy Perspectives About the HIV Care Continuum: Results From a Qualitative Study in Jackson, Mississippi
Mississippi has some of the most pronounced racial disparities in HIV infection in the country; African Americans comprised 37% of the Mississippi population but represented 80% of new HIV cases in 2015. Improving outcomes along the HIV care continuum, including linking and retaining more individuals and enhancing adherence to medication, may reduce the disparities faced by African Americans in Mississippi. Little is understood about clergy's vie…
Knowledge and willingness to use pre-exposure prophylaxis among men who have sex with men in Northeastern Brazil
Few studies evaluate knowledge and willingness to use pre-exposure prophylaxis (PrEP) among men who have sex with men (MSM) in middle-income countries. Brazil added PrEP to public drug formularies in December 2017, but little is known about local knowledge and attitudes about PrEP among MSM outside metropolitan areas in Southern Brazil. The cross-sectional HIV Surveillance Survey Project in Brazil estimates HIV and STD prevalence among MSM in 12 …
Social Capital and Risk of Concurrent Sexual Partners Among African Americans in Jackson, Mississippi
Concurrent sexual partnerships (i.e., relationships that overlap in time) contribute to higher HIV acquisition risk. Social capital, defined as resources and connections available to individuals is hypothesized to reduce sexual HIV risk behavior, including sexual concurrency. Additionally, we do not know whether any association between social capital and sexual concurrency is moderated by gender. Multivariable logistic regression tested the assoc…
Racial and Ethnic Disparities in HIV Pre-exposure Prophylaxis Awareness Among Men Who have Sex with Men
Telephone-Delivered Mindfulness Training to Promote Medication Adherence and Reduce Sexual Risk Behavior Among Persons Living with HIV: An Exploratory Clinical Trial
Open pilot trial of a brief motivational interviewing-based HIV pre-exposure prophylaxis intervention for men who have sex with men: Preliminary effects, and evidence of feasibility and acceptability
Gay, bisexual and other men who have sex with men (MSM) are at high-risk of HIV infection in the United States. Daily oral pre-exposure prophylaxis (PrEP) has demonstrated efficacy in reducing HIV acquisition among MSM. However, PrEP uptake in real-world clinical settings has been slow and uneven. Guided by Self-Regulation Theory, we developed and evaluated a brief (15-25 min) motivational interviewing (MI)-based intervention to promote PrEP upta…
Longitudinal effects of home-based HIV self-testing on well-being and health empowerment among men who have sex with men (MSM) in the United States
HIV self-test (HST) kits have been available for purchase directly by consumers since 2012. However, public health and prevention programs have been slow to adopt self-testing as a strategy for improving testing rates and regularity, in part due to concerns about its effects on the well-being of users and lack of follow-up. This study explored whether there were differences in several constructs related to well-being, including health-related qua…
Development of Telemedicine Infrastructure at an LGBTQ+ Clinic to Support HIV Prevention and Care in Response to Covid-19, Providence, RI
Gay and Bisexual Men’s Recommendations for Effective Digital Social Marketing Campaigns to Enhance HIV Prevention and Care Continuity
A new global database on agriculture investment and capital stock
Leveraging Medicaid to Enhance Preexposure Prophylaxis Implementation Efforts and Ending the HIV Epidemic
"Leveraging Medicaid to Enhance Preexposure Prophylaxis Implementation Efforts and Ending the HIV Epidemic." , 110(1), pp. 65–66
Real-Time Spatiotemporal Analysis of Microepidemics of Influenza and Covid-19 Based on Hospital Network Data: Colocalization of Neighborhood-Level Hotspots
Objectives. To identify spatiotemporal patterns of epidemic spread at the community level. Methods. We extracted influenza cases reported between 2016 and 2019 and COVID-19 cases reported in March and April 2020 from a hospital network in Rhode Island. We performed a spatiotemporal hotspot analysis to simulate a real-time surveillance scenario. Results. We analyzed 6527 laboratory-confirmed influenza cases and identified microepidemics in more th…
Medicine (53 works) · HIV/AIDS Research and Interventions (48 works) · Family medicine (44 works) · HIV, Drug Use, Sexual Risk (44 works) · Men who have sex with men (34 works) · Human immunodeficiency virus (HIV (31 works) · Public health (31 works) · Pre-exposure prophylaxis (25 works) · Health psychology (23 works) · Psychology (23 works)