Publications by authors named "Philip T Korthuis"

Background: Voter initiatives in Oregon and Colorado authorize legal frameworks for supervised psilocybin services, but no measures monitor safety or outcomes.

Aims: To develop core measures of best practices.

Methods: A three-phase e-Delphi process recruited 36 experts with 5 or more years' experience facilitating psilocybin experiences in various contexts (e.

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Article Synopsis
  • Accurate estimates of drug use and related health issues among marginalized populations, especially persons who use drugs (PWUD) in rural areas, are essential for effective intervention and understanding health disparities.* -
  • The study used respondent-driven sampling (RDS) to recruit PWUD and evaluated the assumptions behind RDS to ensure the reliability of its prevalence estimates, analyzing various drug usage variables and health indicators among participants.* -
  • Findings indicated a median participant age of 34, with opioids being the most commonly used drug; however, recruitment chains often lacked sufficient length for reliable sample representation, and different weighting methods showed minimal differences in prevalence estimates.*
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Aim: The aim of this study was to estimate how ongoing stimulant use affects return to illicit opioid use after initiation onto medication for opioid use disorder (MOUD).

Design: This was a secondary analysis of pooled data from two clinical trials comparing buprenorphine (BUP-NX) and extended-release naltrexone (XR-NTX).

Setting: Thirteen opioid treatment programs and HIV clinics across 10 states in the United States from 2014 to 2019 took part in this study.

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Background And Aims: Socio-cultural (gender) and biological (sex)-based differences contribute to psychostimulant susceptibility, potentially affecting treatment responsiveness among women with methamphetamine use disorder (MUD). The aims were to measure (i) how women with MUD independently and compared with men respond to treatment versus placebo and (ii) among women, how the hormonal method of contraception (HMC) affects treatment responsiveness.

Design: This was a secondary analysis of ADAPT-2, a randomized, double-blind, placebo-controlled, multicenter, two-stage sequential parallel comparison design trial.

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Despite advances in antiretroviral therapy, chronic immune activation continues to be observed among individuals with well-controlled HIV viral loads, and is associated with non-AIDS defining morbidities among people living with HIV. Alcohol use disorder impacts a significant proportion of individuals living with HIV, and alcohol exposure is known to damage the intestinal epithelium which may increase translocation of pathogens and their molecular products, driving systemic immune activation and dysregulation. The aim of this study was to determine if adults living with HIV with well-controlled viral loads, who also suffer from alcohol use disorder with and without hepatitis C virus co-infection (n=23), exhibit evidence of advanced systemic immune activation, intestinal damage, and microbial translocation, as compared to adults living with HIV who are not exposed to chronic alcohol or other substances of abuse (n=29).

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Objectives: The objective of this study was to investigate the impact of COVID-19 on the mental health, substance use, and overdose concerns among people who use drugs (PWUDs) in rural communities to explore reasons for changes and ways to mitigate COVID-19 impact in the future.

Methods: We conducted semi-structured in-depth interviews with PWUDs in 5 rural Oregon counties with high overdose rates. Participants were identified through participant-driven sampling along with flyer and text advertising (n = 36).

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Objectives: Although medications for opioid use disorder (MOUD) save lives, treatment retention remains challenging. Identification of interventions to improve MOUD retention is of interest to policymakers and researchers. On behalf of the Agency for Healthcare Research and Quality, we conducted a rapid evidence review on interventions to improve MOUD retention.

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Background: Opioid-use disorders (OUD) and hepatitis C or B co-infection (HEP) are common among people living with HIV (PLHIV). The impact of OUD on innate and adaptive immunity among PLHIV with and without HEP is unknown.

Objectives: To investigate the impact of OUD on monocyte and T-cell phenotypes, cytokine responses to lipopolysaccharide (LPS) and phytohemagglutinin (PHA), and plasma inflammatory markers, among PLHIV with and without HEP.

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Objectives: Annual screening for gonorrhea [Neisseria gonorrhoeae (NG)] and chlamydia [Chlamydia trachomatis (CT)] is recommended for all sexually active persons living with HIV but is poorly implemented. Studies demonstrating no increases in NG and/or CT (NG/CT) case detection in clinics that successfully expanded NG/CT screening raise questions about this broad screening approach. We evaluated NG/CT case detection in the HIV Research Network during 2004-2014, a period of expanding testing.

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Background And Aims: HIV-infected people with substance use disorders are least likely to benefit from advances in HIV treatment. Integration of extended-release naltrexone (XR-NTX) into HIV clinics may increase engagement in the HIV care continuum by decreasing substance use. We aimed to compare (1) XR-NTX treatment initiation, (2) retention and (3) safety of XR-NTX versus treatment as usual (TAU) for treating opioid use disorder (OUD) and/or alcohol use disorder (AUD) in HIV clinics.

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Background: Cancer is increasingly common among persons with HIV.

Objective: To examine calendar trends in cumulative cancer incidence and hazard rate by HIV status.

Design: Cohort study.

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Background: The Patient Protection and Affordable Care Act encourages healthcare systems to track quality-of-care measures; little is known about their impact on mortality rates. The objective of this study was to assess associations between HIV quality of care and mortality rates.

Methods: A longitudinal survival analysis of the Veterans Aging Cohort Study included 3038 human immunodeficiency virus (HIV)-infected patients enrolled between June 2002 and July 2008.

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Screening persons living with HIV for gonorrhea and chlamydia has been recommended since 2003. We compared annual gonorrhea/chlamydia testing to syphilis and lipid testing among 19,368 adults (41% men who have sex with men, 30% heterosexual men, and 29% women) engaged in HIV care. In 2004, 22%, 62%, and 70% of all patients were tested for gonorrhea/chlamydia, syphilis, and lipid levels, respectively.

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Objective: To describe patient-provider communication about opioid pain medicine and explore how these discussions affect provider attitudes toward patients.

Methods: We audio-recorded 45 HIV providers and 423 patients in routine outpatient encounters at four sites across the country. Providers completed post-visit questionnaires assessing their attitudes toward patients.

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: Hepatitis B virus (HBV) and hepatitis C virus (HCV) coinfection are increasingly important sources of morbidity among HIV-infected persons. We determined associations between hepatitis coinfection and healthcare utilization among HIV-infected adults at 4 US sites during 2006-2011. Outpatient HIV visits did not differ by hepatitis serostatus and decreased over time.

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Objective: Motivational interviewing (MI) can promote behavior change, but HIV care providers rarely have training in MI. Little is known about the use of MI-consistent behavior among untrained providers. This study examines the prevalence of such behaviors and their association with patient intentions to reduce high-risk sexual behavior.

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Persons with HIV who develop depression have worse medical adherence and outcomes. Poor patient-provider communication may play a role in these outcomes. This cross-sectional study evaluated the influence of patient depression on the quality of patient-provider communication.

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Objective: We sought to evaluate whether cultural distance between patients and providers was associated with quality of care for people living with HIV/AIDS, and whether cultural distance helped explain racial/ethnic disparities in HIV care.

Methods: We surveyed 437 patients and 45 providers at 4 HIV clinics in the U.S.

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Background: Control of viral replication through combination antiretroviral therapy (cART) improves patient health outcomes. Yet many HIV-infected patients have comorbidities that pose social and clinical barriers to achieving viral suppression. Integration of subspecialty services into HIV primary care may overcome such barriers.

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Substance abuse treatment is associated with decreases in human immunodeficiency virus (HIV) risk behavior and can improve HIV outcomes. The purpose of this study was to examine factors associated with substance abuse treatment utilization, including patient-provider discussions of substance use issues. We surveyed 951 HIV-infected adults receiving care at 14 HIV Research Network primary care sites regarding drug and alcohol use, substance abuse treatment, and provider discussions of substance use issues.

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While principles of evidence-based medicine (EBM) are increasingly prevalent in medical education curricula in Europe and North America, medical educators elsewhere face formidable barriers to its implementation. We sought to determine the feasibility of implementing a learner-centered, case-based EBM curriculum among academic physicians in Kazan, Russia, facilitated by residents participating in an international health elective. This article reports that implementation of an EBM curriculum is feasible during a resident international health elective and that mutually beneficial educational exchanges represent an opportunity for teaching the tenets of EBM abroad.

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