How strong is the evidence supporting the WHO guidelines on physical activity, sedentary behaviour and sleep in early childhood?

BACKGROUND: The WHO issued recommendations about the ideal amount of physical activity, sedentary behaviour and sleep in infants, toddlers and preschool children. To facilitate their interpretation and translation into public health policies, we analysed the quantity and quality of the evidence that supported the development of each WHO recommendation. METHODS: All data for each exposure-outcome pair analysed in the studies informing WHO guidelines were extracted, and predefined criteria, based upon GRADE methodology, were used to classify each outcome and study result. RESULTS: Among the 237 studies that could be included, 37 were experimental and 200 were observational, yielding 920 analyses of exposure-outcome associations. Sixty-two analyses used a relevant outcome, with or without significant results. Five of the 10 WHO recommendations were based upon zero analyses with significant results on relevant health outcomes. The remaining recommendations were mostly based upon analyses evaluating obesity-related outcomes. Eight of the 10 GLs thresholds were not supported by any significant analysis on clinically relevant outcomes. CONCLUSION: While these findings should not be interpreted as an attempt to disprove the benefits of healthy lifestyle habits in early childhood, neither to minimize the work of the experts in this complex research field, very limited evidence currently supports the adoption of recommended thresholds as behavioural surveillance and public health interventions targets. Therefore, until further data are available, public health interventions should be developed balancing whether to focus on the achievement of specific targets that are still not supported by high-quality evidence or on the general promotion of healthy behaviours.

The fifth edition of the WHO-Classification - what is new for cutaneous lymphomas?

The recently published 5th edition of the "World Health Organization classification of hematolymphoid tumors: lymphoid neoplasms" provides a hierarchical reorganization. In general, new (definitive) entities as well as tumor-like lesions were included. Primary cutaneous B-cell lymphomas (CBCL) received a thorough review. A new class/family of cutaneous follicle center lymphomas was defined. Primary cutaneous marginal zone lymphoma is now presented as a separate entity independent from extranodal marginal zone lymphoma of mucosa-associated lymphoid tissue. In primary cutaneous T-cell lymphoma, former provisional entities were upgraded to definite entities. Sézary Syndrome was sorted into the class/family of mature T-cell and NK-cell leukemias. Additionally, a newly formed entity of primary cutaneous peripheral T-cell lymphoma, NOS was created for CTCL entities that do not fit into the already described CTCL entities. The increasing importance of genomic and molecular data has already been recognized in classifying leukemias and systemic lymphomas. However, in PCL the genomic landscape has not yet been fully described and validated. Therefore, future research is necessary to describe the genomic and molecular mechanisms underlying the disease entities more clearly. This would both meet a diagnostic need and valuably contribute to future classification schemes.

Adherence to antiretroviral therapy among people living with HIV attending medication-assisted treatment clinics in Dar es Salaam, Tanzania: a cross-sectional study.

Introduction: the prevalence of human immunodeficiency virus (HIV) among people who inject drugs (PWIDs) in Tanzania is estimated at 35%, significantly surpassing the 4.6% HIV prevalence of the general population. People who inject drugs living with HIV have been reported to exhibit lower adherence to antiretroviral therapy (ART), leading to increased rates of mortality, morbidity, and HIV transmission. This study assessed adherence to ART and associated factors among PWIDs in Dar es Salaam. Methods: this cross-sectional study involved 277 PWIDs living with HIV who attended MAT clinics in Dar es Salaam from May to July 2022. Antiretroviral therapy adherence was assessed using a validated one-month self-recall medication adherence scale, and associated factors were obtained through a structured questionnaire. Statistical analyses included chi-square tests, Fisher exact tests, and log-binomial regression. Data were analyzed using STATA version 15, with a p-value of <0.05 considered statistically significant. Results: this study found that 83% of the study participants had a high level of adherence to ART. Additionally, the results revealed that PWIDS who consume alcohol were less likely to have high adherence to ART (aPR 0.820). On the other hand, higher odds of ART adherence were observed among participants who had family support (aPR 1.028) and those who had adequate knowledge of ART benefits (aPR 1.285). Conclusion: the government and development partners should implement novel interventions such as alcohol reduction programs, ART education, and expanded HIV community outreach services. These interventions have the potential to improve ART adherence and reduce HIV transmission among PWIDs.

"It's Almost Like Playing 'The Price is Right'": Factors Considered by Online Male Sex Workers When Setting the Price for Their Services.

Some men who have sex with men (MSM) engage in the exchange of sexual services for money, drugs, shelter or something else of value. There has been limited research examining the factors that influence how male sex workers (MSWs) determine their fees for their services. To learn more about this, qualitative interview data were analyzed from 180 MSM from 8 US cities who had recently engaged in exchange sex with clients they had primarily met through dating/hookup websites and apps. The primary factor that affected participants' fees was the type of services provided, with a higher price generally charged for anal sex than for oral sex, mutual masturbation or massage. Condomless anal sex, in particular, commanded a higher fee. Additionally, participants required more money for special kinks or fetishes or any services that they considered to be risky, demanding or physically or emotionally uncomfortable. Other factors that affected how much participants charged for a given encounter included the duration of the meeting, the level of client appeal, the perceived wealth of the client, and the participant's current financial situation. Participants varied in their approaches to fee setting, in terms of both their degree of flexibility when negotiating a price and whether they preferred to suggest a fee or have the client first state an amount they were willing to pay. Information about MSWs' approaches to fee setting provides greater understanding of their lived experiences and the risks they may accept for higher fees.

Ultrasound-Based Radiomics for Predicting the WHO/ISUP Grading of Clear-Cell Renal Cell Carcinoma.

OBJECTIVE: To explore the performance of ultrasound image-based radiomics in predicting World Health Organization (WHO)/International Society of Urological Pathology (ISUP) grading of clear-cell renal cell carcinoma (ccRCC). METHODS: A retrospective study was conducted via histopathological examination on participants with ccRCC from January 2021 to August 2023. Participants were randomly allocated to a training set and a validation set in a 3:1 ratio. The maximum cross-sectional image of the lesion on the preoperative ultrasound image was obtained, with the region of interest (ROI) delineated manually. Radiomic features were computed from the ROIs and subsequently normalized using Z-scores. Wilcoxon test and least absolute shrinkage and selection operator (LASSO) regression were applied for feature reduction and model development. The performance of the model was estimated by indicators including area under the curve (AUC), sensitivity and specificity. RESULTS: A total of 336 participants (median age, 57 y; 106 women) with ccRCC were finally included, of whom 243 had low-grade tumors (grade 1-2) and 93 had high-grade tumors (grade 3-4). A total of 1163 radiomic features were extracted from the ROIs for model construction and 117 informative radiomics features selected by Wilcoxon test were submitted to LASSO. Our ultrasound-based radiomics model included 51 features and achieved AUCs of 0.90 and 0.79 for the training and validation sets, respectively. Within the training set, the sensitivity and specificity measured 0.75 and 0.92, respectively, whereas in the validation set, the sensitivity and specificity measured 0.65 and 0.84, respectively. In the subgroup analysis, for the training and validation sets Philips AUCs were 0.91 and 0.75, Toshiba AUCs were 0.82 and 0.90, and General Electric AUCs were 0.95 and 0.82, respectively. CONCLUSION: Ultrasound-based radiomics can effectively predict the WHO/ISUP grading of ccRCC.

Intersecting Stigma and the HIV Care Cascade: Qualitative Insights from Sex Workers, Men who have Sex with Men, and Transgender Women Living with HIV in Jamaica.

In Jamaica, stigma experiences of sex workers (SW), gay men and other men who have sex with men (MSM), and transgender women living with HIV remain understudied. To address this gap, we explored experiences of stigma and linkages with the HIV care cascade among key populations living with HIV in Jamaica, including cisgender women SW, MSM, and transgender women. This qualitative study involved n = 9 focus groups (FG), n = 1 FG per population living with HIV (SW, MSM, transgender women) in each of three sites (Kingston, St. Ann, Montego Bay). We also conducted key informant (KI) interviews. We applied thematic analysis informed by the Health Stigma and Discrimination (HSD) Framework. FG participants (n = 67) included SW (n = 18), MSM (n = 28), and trans women (n = 21); we interviewed n = 10 KI (n = 5 cisgender women, n = 5 cisgender men). Participant discussions revealed that stigma drivers included low HIV treatment literacy, notably misinformation about antiretroviral therapy (ART) benefits and HIV acquisition risks, and a lack of legal protection from discrimination. Stigma targets health (HIV) and intersecting social identities (sex work, LGBTQ identities, gender non-conformity, low socio-economic status). Stigma manifestations included enacted stigma in communities and families, and internalized stigma-including lateral violence. HIV care cascade impacts included reduced and/or delayed HIV care engagement and ART adherence challenges/disruptions. Participants discussed strategies to live positively with HIV, including ART adherence as stigma resistance; social support and solidarity; and accessing affirming institutional support. In addition to addressing intersecting stigma, future research and programing should bolster multi-level stigma-resistance strategies to live positively with HIV.

Antimicrobial therapy approaches in the mastitis control driven by one health insights.

The use of antimicrobials in the dairy production environment for mastitis control must take etiology, clinical signs, economic impacts, and regulatory frameworks into consideration. The objective of the present review is to highlight important aspects of the dynamics of antimicrobial use in dairy production and the potential impacts on the main pathogens circulating in this environment, considering the parameters set by the World Health Organization (WHO) regarding the priority of monitoring as well as control strategies for these agents, such as the methicillin-resistant Staphylococcus and the beta-lactamase-producing Escherichia coli. Understanding the animal-environment-pathogen triad is crucial for establishing control measures and preventing the spread of bacterial resistance. Implementing mastitis prevention and control measures in dairy farms, considering process flow and personnel qualification, enables a reduction in antimicrobial usage and contributes to prevent the spread of resistant bacterial agents in the dairy production environment, minimizing the relapses and the chronicity of the infectious process.

A utilização de antimicrobianos no controle de mastite em ambiente de produção leiteira deve considerer alguns aspectos como a etiologia, os sinais clínicos, os impactos económicos e a legislação. O objetivo da presente revisão é destacar aspectos importantes na dinâmica do uso de antimicrobianos na produção leiteira e os potenciais impactos sobre os principais patógenos circulantes neste ambiente, considerando os parâmetros estabelecidos pela Organização Mundial da Saúde (OMS) quanto à prioridade de monitoramento, bem como estratégias de controle para esses agentes, como o Staphylococcus resistente à meticilina e a Escherichia coli produtora de beta-lactamase. Compreender a tríade animal-ambiente-patógeno é crucial para estabelecer medidas de controle e prevenir a propagação da resistência bacteriana. A implementação de medidas de prevenção e controle de mastites nas propriedades leiteiras, considerando o fluxo do processo e a qualificação do pessoal, permite a redução do uso de antimicrobianos e contribui para prevenir a propagação de agentes bacterianos resistentes no ambiente de produção leiteira, minimizando as recidivas e a cronicidade do processo infeccioso.

Patterns of Chemsex Substance Use and Its Association with HIV Transmission Risk Among Men Who Have Sex with Men in Thailand: A Latent Class Analysis.

Sexualized substance use or "chemsex" may contribute to the HIV epidemic among men who have sex with men (MSM) in Thailand. Specific patterns of chemsex use may be associated with different HIV/STI transmission risks. We examined typologies and correlates of sexualized substance use among a sample of high-risk MSM (n = 532) who had attended a private sex party or circuit party in the past three years using latent class analysis. Multinomial regression was used to adjust for variables associated with the 3-class latent class model. We identified a 3-class model as the best fitting model, which included: (1) "negligible sexualized substance users" (36.7%), who had never engaged in chemsex in the past six months; (2) "sexualized substance users" (13.9%), who had a high level of sexualized alcohol use and a wide range of other substances before or during sex in the past six months; and (3) "exclusive chemsex users" (49.4%), who predominantly used crystal methamphetamine, amyl nitrite, and erectile dysfunctional drugs before or during sex in the past six months. Compared to negligible sexualized substance users, exclusive chemsex users were more likely to be HIV-positive, more likely to have six or more sexual partners in the past six months, less likely to have condom use at last anal intercourse, and more likely to have provided sex work. Relative to negligible sexualized substance users, sexualized substance users reported more frequent online sex-seeking behaviors. These subgroups of Thai MSM have unique substance use patterns and HIV-related risk profiles, underscoring the importance of targeted HIV prevention strategies.

Incorrect and Sex-Inconsistent Mapping of Disorders: Identification of Sex Biases in the ICD-10, ICD-11 and SNOMED CT and How to Work Around Them.

In the international classifications ICD-10-WHO and ICD-11-WHO, many sex-specific diseases have incomplete coding. It is possible to further enhance semantic interoperability using SNOMED CT additionally to ICD. Part of the analysis of semantic interoperability of diagnoses in the ICD are Sexual Dysfunctions, Postpartum Depression, Sexual Assault, Premenstrual Tension Syndrome and Premenstrual Dysphoric Disorder, Female Genital Mutilation and Cutting, Gender Incongruence and Disorders of Breast. Labeling biases have been identified in all diagnoses, either in SNOMED CT or ICD. For mental disorders associated with pregnancy, gender incongruence and sexual violence the use of the GPS of SNOMED CT can help enhance semantic interoperability additionally to ICD.

Linking Health Terminologies: A Unified Approach to the WHO Family of International Classifications.

This paper presents an effort by the World Health Organization (WHO) to integrate the reference classifications of the Family of International Classifications (ICD, ICF, and ICHI) into a unified digital framework. The integration was accomplished via an expanded Content Model and a single Foundation that hosts all entities from these classifications, allowing the traditional use cases of individual classifications to be retained while enhancing their combined use. The harmonized WHO-FIC Content Model and the unified Foundation has streamlined the content management, enhanced the web-based tool functionalities, and provided opportunities for linkage with external terminologies and ontologies. This integration promises reduced maintenance cost, seamless joint application, complete representation of health-related concepts while enabling better interoperability with other informatics infrastructures.

A Brief Alcohol Intervention (BAI) to reduce alcohol use and improve PrEP outcomes among men who have sex with men in Vietnam: study protocol for a randomized controlled trial.

BACKGROUND: In Vietnam and other global settings, men who have sex with men (MSM) have become the population at greatest risk of HIV infection. Although HIV pre-exposure prophylaxis (PrEP) has been implemented as a prevention strategy, PrEP outcomes may be affected by low persistence and adherence among MSM with unhealthy alcohol use. MSM have a high prevalence of unhealthy alcohol use in Vietnam, which may affect PrEP outcomes. METHODS: Design: We will conduct a two-arm hybrid type 1 effectiveness-implementation randomized controlled trial of a brief alcohol intervention (BAI) compared to the standard of care (SOC) at the Sexual Health Promotion (SHP) clinic Hanoi, Vietnam. PARTICIPANTS: Sexually active MSM (n=564) who are newly initiating PrEP or re-initiating PrEP and have unhealthy alcohol use will be recruited and randomized 1:1 to the SOC or BAI arm. A subgroup of participants (n=20) in each arm will be selected for longitudinal qualitative interviews; an additional subset (n=48) in the BAI arm will complete brief quantitative and qualitative interviews after completion of the BAI to assess the acceptability of the intervention. Additional implementation outcomes will be assessed through interviews with clinic staff and stakeholders (n=35). INTERVENTION: Study participants in both arms will receive standard care for PrEP clients. In the BAI arm, each participant will receive two face-to-face intervention sessions and two brief booster phone sessions, based on cognitive behavioral therapy and delivered in motivational interviewing informed style, to address their unhealthy alcohol use. OUTCOMES: Effectiveness (PrEP and alcohol use) and cost-effectiveness outcomes will be compared between the two arms. Intervention implementation outcomes (acceptability, feasibility, adoption) will be assessed among MSM participants, clinic staff, and stakeholders. DISCUSSION: This proposed trial will assess an alcohol intervention for MSM with unhealthy alcohol use who initiate or re-initiate PrEP, while simultaneously preparing for subsequent implementation. The study will measure the effectiveness of the BAI for increasing PrEP persistence through reducing unhealthy alcohol use in a setting where excessive alcohol consumption is a normative behavior. If effective, implementation-focused results will inform future scale-up of the BAI in similar settings. TRIAL REGISTRATION: NCT06094634 on clinicaltrials.gov. Registered 16 October 2023.

Harm reduction-focused behavioral activation for people who inject drugs: Mixed methods outcomes from a pilot open trial.

INTRODUCTION: People who inject drugs (PWID) experience high rates of mental health problems and drug-related harms. Harm reduction-focused interventions aim to reduce harms associated with drug use and are an important approach for engaging people who are not seeking traditional abstinence-focused treatment. Yet, few studies to date have examined the effectiveness of harm reduction psychosocial treatment for drug use. We evaluated the outcomes of a harm reduction-focused behavioral activation (BA) intervention from pretreatment to a 1-month follow-up. METHODS: A total of N = 23 PWID (65.2 % White; 52.2 % women; mean age 35.4 ±â€¯7.8 years) were recruited from syringe services programs and n = 19 received the intervention via teletherapy. Assessment of study outcome measures occurred at pre- and posttreatment and a one-month follow-up. RESULTS: Results reflected post-intervention increases in behavioral activation and readiness to change drug use, as well as decreases in substance use, depression, and HIV risk behaviors. There were mixed outcomes on substance-related problems with increases at follow-up, possibly reflecting increased problem recognition. CONCLUSIONS: These results suggest initial promise for the harm reduction-focused treatment. Additional research with randomized designs and larger sample sizes is needed, and more intensive treatment may be required to support sustained treatment gains in this population.

Latine perspectives on the impact of family, perceptions of medication, health systems, incarceration, and housing on accessing opioid agonist therapy: A thematic analysis.

INTRODUCTION: Opioid-related overdose deaths rates among Latine individuals are increasing rapidly and, in Massachusetts, have exceeded rates among non-Hispanic White individuals. Yet Latine individuals are less likely to receive opioid agonist therapies (OAT) methadone and buprenorphine, which have been demonstrated to prevent opioid deaths. Amid climbing Latine overdose rates, we lack qualitative data from Spanish-speaking people who use opioids about their views on and access to OAT. In this paper, we sought to assess variables affecting Latine individuals' initiation of OAT. METHODS: We conducted 21 semi-structured interviews - half in Spanish - with Latine-identifying individuals recruited from four locations-three residential treatment sites and one city shelter-in Boston offering services to people who use drugs. We utilized thematic analysis to identify barriers and facilitators to starting and continuing OAT. RESULTS: The following themes - which cut across individual-, interpersonal-, and systems-level variables - emerged as core considerations shaping Latine participants' OAT engagement: (1) family, (2) medication desirability and accessibility, (3) health care resources, (4) housing stability, and (5) incarceration. First, family members were prominent interpersonal influences on participants' treatment decisions. For some participants, family introduced participants to opioids at young ages and later supported them in recovery. Second, engagement with OAT was shaped by individual-level opinions on the medications as well as by systems-level experiences with trying to access the medications. Participants identified benefits and drawbacks of methadone versus buprenorphine, with greater access difficulties for methadone. Third, the health care setting in Boston provided notable systems-level facilitators to OAT access, including outreach workers, Medicaid, and Spanish-speaking providers. Fourth, housing instability impeded some from accessing OAT while motivating others to initiate the medications. Finally, incarceration created systems-level barriers to OAT engagement. Most participants had been incarcerated in jail or prison but did not have access to OAT during incarceration or during their transition back to community. CONCLUSIONS: Approaches to increase OAT engagement among Latine individuals should consider integrating family into recovery pathways, tailoring information in Spanish, developing bilingual/bicultural staffing, ensuring supportive insurance coverage systems, addressing housing needs, and making OAT available for individuals involved in the legal system.

Study of Sonographic Indicators of Ovarian Reserves in Women With WHO-Defined Anovulatory Disorders.

Depending on the age of the wife or female partner, infertility is defined as the inability of a couple to achieve conception after 12 months if the age is ≤35 years and six months if the age is ≥35 years. About half of female infertility is attributed to ovulatory dysfunction, and the rest is either due to tubal and pelvic pathology or problems such as thyroid disease or anatomic abnormalities. Ovulatory disorders are one of the major factors for infertility problems in couples. Ultrasound monitoring of ovarian follicle growth plays a pivotal role in infertility treatment. The total number of small antral follicles in both ovaries is an important predictive parameter of the ovarian induction cycle, whereas ovarian volume is the parameter most easily assessed by ultrasound. The purpose of this study is to analyze the sonographic indicators of infertility (antral follicle count and ovarian volume) in four World Health Organization (WHO)-defined anovulatory groups and compare the same with that of healthy fertile women.

[The definition of pandemic: causes and consequences of its adjustment in 2009 and 2011].

The article considers results of the study evaluating historical and epidemiological events that preceded and accompanied adjustment of the pandemic description on the WHO website in 2009 and 2011. The analysis covered publications related to epidemics and pandemics issues, the WHO documents, the WHO website. The descriptions of pandemic mostly focused on "enormous numbers of cases and deaths". Since May 2009, new description of pandemic was published, focusing on disease prevalence. In 2011 it reverted to initial one with no comments. From perspective of the WHO document of 2009, declaration of swine flu pandemic in June 2009 seemed justified. However, considering previous pandemic history, common sense and consequences of declaring pandemic of disease with low both number of cases and mortality, it was premature move. Since primary factor hindering development of pandemic is effectiveness of infectious disease treatment, to minimize likelihood of new pandemic it is necessary to improve special medical education quality and to study and to adapt to modern conditions all effective medications and methods used in the past.

How Does an Online Mental Health Community on Twitter Empower Diverse Population Levels and Groups? A Qualitative Analysis of #BipolarClub.

BACKGROUND: Social media, including online health communities (OHCs), are widely used among both healthy people and those with health conditions. Platforms like Twitter (recently renamed X) have become powerful tools for online mental health communities (OMHCs), enabling users to exchange information, express feelings, and socialize. Recognized as empowering processes, these activities could empower mental health consumers, their families and friends, and society. However, it remains unclear how OMHCs empower diverse population levels and groups. OBJECTIVE: This study aimed to develop an understanding of how empowerment processes are conducted within OMHCs on Twitter by identifying members who shape these communities, detecting the types of empowerment processes aligned with the population levels and groups outlined in Strategy 1 of the Integrated People-Centred Health Services (IPCHS) framework by the World Health Organization (WHO), and clarifying members' involvement tendencies in these processes. METHODS: We conducted our analysis on a Twitter OMHC called #bipolarclub. We captured 2068 original tweets using its hashtag #bipolarclub between December 19, 2022, and January 15, 2023. After screening, 547 eligible tweets by 182 authors were analyzed. Using qualitative content analysis, community members were classified by examining the 182 authors' Twitter profiles, and empowerment processes were identified by analyzing the 547 tweets and categorized according to the WHO's Strategy 1. Members' tendencies of involvement were examined through their contributions to the identified processes. RESULTS: The analysis of #bipolarclub community members unveiled 5 main classifications among the 182 members, with the majority classified as individual members (n=138, 75.8%), followed by health care-related members (n=39, 21.4%). All members declared that they experience mental health conditions, including mental health and general practitioner members, who used the community as consumers and peers rather than for professional services. The analysis of 547 tweets for empowerment processes revealed 3 categories: individual-level processes (6 processes and 2 subprocesses), informal carer processes (1 process for families and 1 process for friends), and society-level processes (1 process and 2 subprocesses). The analysis also demonstrated distinct involvement tendencies among members, influenced by their identities, with individual members engaging in self-expression and family awareness support and health care-related members supporting societal awareness. CONCLUSIONS: The examination of the #bipolarclub community highlights the capability of Twitter-based OMHCs to empower mental health consumers (including those from underserved and marginalized populations), their families and friends, and society, aligning with the WHO's empowerment agenda. This underscores the potential benefits of leveraging Twitter for such objectives. This pioneering study is the very first to analyze how a single OMHC can empower diverse populations, offering various health care stakeholders valuable guidance and aiding them in developing consumer-oriented empowerment programs using such OMHCs. We also propose a structured framework that classifies empowerment processes in OMHCs, inspired by the WHO's Strategy 1 (IPCHS framework).

Assessment of Sexual Violence Risk Perception in Men Who Have Sex With Men: Proposal for the Development and Validation of "G-Date".

BACKGROUND: Sexual violence (SV) is a significant problem for sexual minorities, including men who have sex with men (MSM). The limited research suggests SV is associated with a host of syndemic conditions. These factors tend to cluster and interact to worsen one another. Unfortunately, while much work has been conducted to examine these factors in heterosexual women, there is a lack of research examining MSM, especially their SV risk perception. Further, MSM are active users of dating and sexual networking (DSN) mobile apps, and this technology has demonstrated usefulness for creating safe spaces for MSM to meet and engage partners. However, mounting data demonstrate that DSN app use is associated with an increased risk for SV, especially given the higher likelihood of using alcohol and other drugs before sex. By contrast, some researchers have demonstrated that DSN technology can be harnessed as a prevention tool for HIV; unfortunately, no such work has progressed regarding SV. OBJECTIVE: This study aims to (1) use qualitative and quantitative methods to tailor an existing laboratory paradigm of SV risk perception in women for MSM using a DSN mobile app framework and (2) subject this novel paradigm to a rigorous validation study to confirm its usefulness in predicting SV, with the potential for use in future prevention endeavors. METHODS: To tailor the paradigm for MSM, a team of computer scientists created an initial DSN app (G-Date) and incorporated ongoing feedback about the usability, feasibility, and realism of this tool from a representative sample of MSM. We used focus groups and interviews to assist in the development of G-Date, including by identifying relevant stimuli, developing the cover story, and establishing the appropriate study language. To confirm the paradigm's usefulness, we are conducting an experimental study with web-based and face-to-face participants to determine the content, concurrent, and predictive validities of G-Date. We will evaluate whether certain correlates of SV informed by syndemics and minority stress theories (eg, history of SV and alcohol and drug use) affect the ability of MSM to detect SV risk within G-Date and how paradigm engagement influences behavior in actual DSN app use contexts. RESULTS: This study received funding from the National Institute on Alcohol Abuse and Alcoholism on September 10, 2020, and ethics approval on October 19, 2020, and we began app development for aim 1 immediately thereafter. We began data collection for the aim 2 validation study in December 2022. Initial results from the validation study are expected to be available after December 2025. CONCLUSIONS: We hope that G-Date will enhance our understanding of factors associated with SV risk and serve as a useful step in creating prevention programs for this susceptible population.

Utilising Integrated Bio-behavioural Surveillance (IBBS) to investigate declining hepatitis C antibody prevalence among people who inject drugs in the Australian Needle and Syringe Program Survey.

BACKGROUND: Prevalence of hepatitis C virus (HCV) antibody (Ab) on dried blood spot (DBS) samples in the Australian Needle and Syringe Program Survey (ANSPS) decreased nationally from 57% in 2015 to 32% in 2022. We aimed to investigate potential explanations for this decline. METHODS: Changes in DBS HCV Ab prevalence were investigated by redefining positive cases as those with those with either a positive HCV Ab test result or a self-reported history of ever having HCV treatment (modified prevalence), examining HCV Ab prevalence by birth and age cohorts, and assessing trends in key risk behaviours. RESULTS: Overall prevalence of DBS HCV Ab declined rapidly and significantly from 57% in 2015 to 32% in 2022 (p<0.001) however modified HCV Ab prevalence remained stable over time (85% and 88% in 2015 and 2022, respectively, p=0.357). The proportion of participants with negative HCV Ab and self-reported HCV infection increased from 20% in 1995 to 40% in 2022 (p<0.001) and the proportion with negative HCV Ab and lifetime HCV treatment increased from 3% in 1999 to 67% in 2022 (p<0.001). We also observed a decreasing trend in DBS HCV Ab prevalence in all birth and age cohorts with a noticeable acceleration in the decline commensurate with the advent of HCV DAA treatment. A long-term decreasing trend was also observed for key risk behaviours (p<0.001) however the short-term trend was not significant for recent receptive syringe sharing. CONCLUSION: The temporal decline in HCV Ab prevalence appears related to reduced sensitivity of DBS HCV Ab detection with viral clearance following treatment. Since 2016, HCV treatment uptake has increased markedly including among people who inject drugs. In this context, continuing to monitor HCV Ab prevalence by DBS testing is problematic, with a shift to surveillance of active infection the most relevant to guide policy and practice in this setting.

A qualitative evaluation of a fentanyl patch safer supply program in Vancouver, Canada.

BACKGROUND: The ongoing overdose crisis in Canada has prompted efforts to increase access to a "safer supply" of prescribed alternatives to the unregulated drug supply. While safer supply programs predominantly distribute hydromorphone tablets, the Safer Alternatives for Emergency Response (SAFER) program in Vancouver, Canada offers a range of prescribed alternatives, including fentanyl patches. However, little is known about the effectiveness of fentanyl patches as safer supply. Drawing on the perspectives and experiences of program participants, we sought to qualitatively evaluate the effectiveness of the SAFER fentanyl patch program in meeting its intended aims, including reducing risk of overdose by decreasing reliance on the unregulated drug supply. METHODS: As part of a larger mixed-methods evaluation of SAFER, semi-structured qualitative interviews were conducted with 17 fentanyl patch program participants between February 2022 and April 2023. Thematic analysis of interview data focused on program engagement, experiences, impacts, and challenges. RESULTS: The flexible program structure, including lack of need for daily dispensation, the extended missed dose protocol, and community pharmacy patch distribution fostered engagement and enhanced autonomy. Improved management of withdrawal symptoms and cravings due to steady transdermal dosing led to reduced unregulated drug use and overdose risk. Participants also experienced economic benefits and improvements in overall health and quality of life. However, skin irritation and patch adhesion issues were key barriers to program retention. CONCLUSION: Our findings demonstrate the value of including fentanyl patch safer supply in the substance use continuum of care and offer insights for innovations in delivery of this intervention.

Effects of Substance Use on Condomless Anal Sex in a Large Sample of Adolescent Men Who Have Sex with Men: A Within and Between Relationship Design.

Substance use is a significant risk factor for HIV infection among adolescent men who have sex with men (AMSM). Substance use may reduce the use of HIV prevention measures or increase the likelihood of engaging in activities with a higher risk of HIV transmission, but there is a lack of studies dedicated to analyzing these mechanisms in adolescents and young MSM. This study aimed to explore the impact of substance use on condomless anal sex (CAS) in a large, racially diverse sample of AMSM. Additionally, we investigated how an individual's general level of substance use moderated the association between substance use before sex and CAS at the partnership level. Baseline data for an HIV prevention intervention were collected through online surveys from April 2018 to June 2020. The sample consisted of 1624 AMSM (M age, 16.69 years) who reported at least one sexual partner in the previous 3 months. Participants provided information about their three most recent sexual partners, including their relationship to the partner, PrEP use, frequency of alcohol, marijuana, and non-prescription drug use before sex, and the number of CAS acts. Participants also completed measures of their substance use frequency. Multilevel modeling in Mplus was used for data analysis, accounting for sexual partnerships nested within participants. All models controlled for PrEP use and relationship status. Results revealed a significant positive association between the frequency of non-prescription drug use before sex and CAS at the partnership level. This indicates that higher non-prescription drug use frequency before sex was associated with a greater number of CAS acts with partners. Moreover, the cross-level interaction between alcohol frequency and non-prescription drug use before sex was statistically significant. Specifically, for participants with high alcohol frequency scores, there was a significant positive association between non-prescription drug use before sex and CAS at the partnership level. AMSM with higher average alcohol consumption were more likely to engage in CAS when using non-prescription drugs prior to sex with a partner, compared to those with lower alcohol consumption. This study's use of multilevel data analysis contributes innovatively to the field by shedding light on how substance use operates within sexual relationships and different partnership dynamics. Tailored interventions targeting substance use should be developed to reduce HIV risk among AMSM.