MSM and drug use: A latent class analysis of drug use and related sexual risk behaviors

The "Chemsex" Phenomenon and Its Relationship with Psychological Variables in Men Who Have Sex with Men

Chemsex is described as the use of psychoactive substances during sexual activity to sustain, enhance, disinhibit, or facilitate the sexual experience. It preferentially concerns men who have sex with men. The main objective of this study was to examine the relationship between participation in chemsex and the psychological variables impulsivity, sexual assertiveness, and hypersexuality. The sample was composed of 137 Spanish men. A total of 104 participants reported that they had engaged in chemsex, with ages ranging from 19 to 42 years (M = 31.41, SD = 4.83). A total of 33 participants reported that they had never participated in chemsex sessions. The participants were contacted and recruited at social centers, LGBT associations, and key informants. Results showed that men who participated in chemsex reported higher impulsivity, higher hypersexuality, and lower sexual assertiveness than those who have never participated in it. The frequency of participation in chemsex, as well as the number of substances consumed, was positively and significantly correlated with dimensions of impulsivity and hypersexuality. This frequency and this consumption were negatively and significantly correlated with sexual assertiveness. Findings showed significant differences in the psychological variables based on the number of consumed substances (polydrug use/consumption of one substance) and the time of consumption (before, during or before and during sex). In conclusion, the study demonstrates the existence of a clear relationship between the experience of chemsex and psychological factors such as being an impulsive person, presenting hypersexual behavior, and/or having low sexual assertiveness.

Association between non-injection drug use and hepatitis C infection among HIV-negative men who have sex with men

BACKGROUND

Prior research predominantly examined the association between HIV-positive men who have sex with men (MSM) or those using injection drugs and hepatitis C virus (HCV) infection. However, limited attention has been given to understanding the association among HIV-negative MSM who do not inject drugs. This gap leaves apportion of the population unexamined, potentially overlooking important factor that may contribute to the transmission and prevalence of HCV. This study aims to investigate the relationship between non-injection drug use and HCV infection in this population.

METHODS

In this cross-sectional study, we analyzed data on 118 MSM who reported use of non-injection drugs. The participants were recruited from two inner-city communities in Houston, TX, between 2004 and 2007 and were negative for both HIV and hepatitis B virus infection. Latent class analysis (LCA) was used to identify drug use latent classes. Multinomial logistic regression analysis was used to evaluate the association between drug use latent class and HCV infection.

RESULTS

Four distinct latent classes of drug use were identified: class 1, persons ≥ 42 years of age who used only crack cocaine; class 2, persons approximately 42 years of age who used > 2 drugs; class 3, persons < 42 years of age who used > 5 drugs; and class 4, persons ≥ 42 years of age who used > 6 drugs. Class 4 was significantly associated with HCV infection. The odds of HCV infection in members of class 4 was 17 times higher than in class 2 members (adjusted odds ratio [aOR] = 16.9, 95% confidence interval [CI]: 1.4-205.4) and almost 22 times higher than in class 3 members (aOR = 21.8, 95% CI: 1.5-322.8).

CONCLUSIONS

Among MSM with non-injection drug use, the subgroup of individuals who were ≥ 42 years of age and used multiple drugs (including heroin, speedball, methamphetamine, crack cocaine, and marijuana) had a high probability of HCV infection. Public health and education programs, as well as drug treatment and rehabilitation programs, should be developed for this high-risk subgroup of individuals to prevent HCV acquisition and transmission.

Supporting treatment adherence for resilience and thriving (START): protocol for a mHealth randomized controlled trial

BACKGROUND

Although behavioral interventions show some promise for reducing stimulant use and achieving durable viral suppression in sexual minority men (SMM) with HIV, scalable mHealth applications are needed to optimize their reach and cost-effectiveness.

METHODS

Supporting Treatment Adherence for Resilience and Thriving (START) is a randomized controlled trial (RCT) testing the efficacy and cost-effectiveness of a mHealth application that integrates evidence-based positive affect regulation skills with self-monitoring of adherence and mood. The primary outcome is detectable HIV viral load (i.e., > 300 copies/mL) from self-collected dried blood spot (DBS) specimens at 6 months. Secondary outcomes include detectable DBS viral load at 12 months, self-reported stimulant use severity, anti-retroviral therapy (ART) adherence, and positive affect over 12 months. A national sample of up to 250 SMM with HIV who screen positive for stimulant use disorder and reporting suboptimal ART adherence is being recruited via social networking applications through April of 2024. After providing informed consent, participants complete a run-in period (i.e., waiting period) including two baseline assessments with self-report measures and a self-collected DBS sample. Those who complete the run-in period are randomized to either the START mHealth application or access to a website with referrals to HIV care and substance use disorder treatment resources. Participants provide DBS samples at baseline, 6, and 12 months to measure HIV viral load as well as complete self-report measures for secondary outcomes at quarterly follow-up assessments over 12 months.

DISCUSSION

To date, we have paid $117,500 to advertise START on social networking applications and reached 1,970 eligible participants ($59.77 per eligible participant). Although we identified this large national sample of potentially eligible SMM with HIV who screen positive for a stimulant use disorder and report suboptimal ART adherence, only one-in-four have enrolled in the RCT. The run-in period has proven to be crucial for maintaining scientific rigor and reproducibility of this RCT, such that only half of consented participants complete the required study enrollment activities and attended a randomization visit. Taken together, findings will guide adequate resource allocation to achieve randomization targets in future mHealth research SMM with HIV who use stimulants.

TRIAL REGISTRATION

This protocol was registered on clinicaltrials.gov (NCT05140876) on December 2, 2021.

A Network Science Approach to Sex-Polydrug Use Among Black Sexually Minoritized Men and Transgender Women: The N2 Cohort Study

Black sexually minoritized men (SMM) and transgender women (TW) are subgroups with lower rates of substance use and comparable rates of condom use relative to White SMM and TW yet experience heightened vulnerability to HIV. This study sought to explore associations of substance use, including sex-drug use (i.e., drug or alcohol use during sex to enhance sex), and condomless sex among Black SMM and TW. Data were collected from Black SMM and TW living in Chicago, Illinois, enrolled in the Neighborhoods and Networks (N2) cohort study, from November 2018 to April 2019. We used bivariate analyses followed by a multilevel egocentric network analysis to identify factors associated with condomless sex. We conducted Spearman correlation coefficients to examine correlations between pairs of sex-drugs to enhance sex. We used a bipartite network analysis to identify correlates of sex-drug use and condomless sex. A total of 352 Black SMM and TW (egos) provided information about 933 sexual partners (alters). Of respondents, 45% reported condomless sex and 61% reported sex-drug use. In unadjusted analyses, marijuana (34%) and cocaine/crack (5%) sex-drug use were associated with condomless sex (p < 0.05). Condomless sex was positively associated with sex-polydrug use, or the use of 2+ drugs or 1 drug and alcohol (OR = 1.48; 95% CI: 1.02-2.14; p = 0.039), and negatively associated with sharing an HIV-negative serostatus with a sexual partner (OR = 0.57; 95% CI: 0.33-0.98; p = 0.041), having a different HIV serostatus with a sexual partner (OR = 0.37; 95% CI: 0.21-0.64; p < 0.001) or not knowing the HIV serostatus of a sexual partner (OR = 0.47; 95% CI: 0.26-0.84; p = 0.011). The following pairs of sex-polydrug use had Spearman correlation coefficients higher than 0.3: marijuana and alcohol, ecstasy and alcohol, cocaine/crack and ecstasy, and methamphetamine and poppers (p < 0.05). HIV prevention interventions for Black SMM and TW designed to reduce HIV transmission through egocentric sexual networks could address sex-drug use through sex-positive and pleasure-centered harm reduction strategies and provide and promote biomedical prevention and care options at supraoptimal levels.

Association of current substance use treatment with future reduced methamphetamine use in an observational cohort of men who have sex with men in Los Angeles

INTRODUCTION

Methamphetamine use is highly prevalent among men who have sex with men (MSM), but knowledge of the long-term dynamics, and how they are affected by substance use treatment, is limited. This study aimed to describe trajectories of methamphetamine use among MSM, and to evaluate the impact of treatment for any kind of substance use on frequency of methamphetamine use.

METHODS

This analysis used data from a cohort of MSM in Los Angeles, CA, who participated in semi-annual study visits from 2014 to 2022. The study characterized trajectories of methamphetamine use using a continuous time multistate Markov model with three states. States were defined using self-reported frequency of methamphetamine use in the past six months: frequent (daily), occasional (weekly or less), and never. The model estimated the association between receiving treatment for any kind of substance use and changes in state of frequency of methamphetamine use.

RESULTS

This analysis included 2348 study visits among 285 individuals who were followed-up for an average of 4.4 years. Among participants who were in the frequent use state, 65 % (n = 26) of those who were receiving any kind of substance use treatment at a study visit had reduced their methamphetamine use at their next visit, compared to 33 % (n = 95) of those who were not receiving treatment. Controlling for age, race/ethnicity, and HIV-status, those who reported receiving current treatment for substance use were more likely to transition from occasional to no use (HR: 1.63, 95 % CI: 1.10-2.42) and frequent to occasional use (HR: 4.25, 95 % CI: 2.11-8.59) in comparison to those who did not report receiving current treatment for substance use.

CONCLUSIONS

Findings from this dynamic modeling study provide a new method for assessing longitudinal methamphetamine use outcomes and add important evidence outside of clinical trials that substance use treatment may reduce methamphetamine use.

Differential risks of syringe service program participants in Central Ohio: a latent class analysis

BACKGROUND

Significant heterogeneity exists among people who use drugs (PWUD). We identify distinct profiles of syringe service program (SSP) clients to (a) evaluate differential risk factors across subgroups and (b) inform harm reduction programming.

METHODS

Latent class analysis (LCA) was applied to identify subgroups of participants (N = 3418) in a SSP in Columbus, Ohio, from 2019 to 2021. Demographics (age, sex, race/ethnicity, sexual orientation, housing status) and drug use characteristics (substance[s] used, syringe gauge, needle length, using alone, mixing drugs, sharing supplies, reducing use, self-reported perceptions on the impact of use, and treatment/support resources) were used as indicators to define latent classes. A five-class LCA model was developed, and logistic regression was then employed to compare risk factors at program initiation and at follow-up visits between latent classes.

RESULTS

Five latent classes were identified: (1) heterosexual males using opioids/stimulants with housing instability and limited resources for treatment/support (16.1%), (2) heterosexual individuals using opioids with stable housing and resources for treatment/support (33.1%), (3) individuals using methamphetamine (12.4%), (4) young white individuals using opioids/methamphetamine (20.5%), and (5) females using opioids/cocaine (17.9%). Class 2 served as the reference group for logistic regression models, and at the time of entry, class 1 was more likely to report history of substance use treatment, overdose, HCV, sharing supplies, and mixing drugs, with persistently higher odds of sharing supplies and mixing drugs at follow-up. Class 3 was more likely to report history of overdose, sharing supplies, and mixing drugs, but outcomes at follow-up were comparable. Class 4 was the least likely to report history of overdose, HCV, and mixing drugs, but the most likely to report HIV. Class 5 was more likely to report history of substance use treatment, overdose, HCV, sharing supplies, and mixing drugs at entry, and higher reports of accessing substance use treatment and testing positive for HCV persisted at follow-up.

CONCLUSIONS

Considerable heterogeneity exists among PWUD, leading to differential risk factors that may persist throughout engagement in harm reduction services. LCA can identify distinct profiles of PWUD accessing services to tailor interventions that address risks, improve outcomes, and mitigate disparities.

Drug use typology, demographic covariates, and associations with condomless anal sex: A latent class analysis among a U.S. national cohort of men who have sex with men

BACKGROUND

Prior research has shown that men who have sex with men (MSM) who use drugs are at increased risk of sexually transmitted infections (STI) and Human Immunodeficiency Virus (HIV). Often, MSM who use drugs use multiple substances at once and research has indicated that certain substances are used in combination more frequently. As a vulnerable population, it is important to understand the various ways in which this population uses drugs in order to structure prevention, harm reduction, and treatment programs to their needs.

METHODS

Data for this analysis were taken from a cohort of geographically diverse U.S. national sample of cisgender men who have sex with men (n = 6111). After assessing prevalence of drug use in the sample, we used iterative latent class analysis to determine substance use classes for 10 substances. After a model was selected, class assignments were examined for association with mean number of insertive and receptive condomless anal sex (CAS) partners in the past three months.

RESULTS

The final model indicated six latent classes: class 1 = "cannabis use" (n = 1,996), class 2 = "diverse use" (n = 299), class 3 = "cocaine and inhalant use" (n = 421), class 4 = "methamphetamine, GHB, and inhalant use" (n = 345), class 5 = "no use" (n = 2431), class 6 = "sedative use" (n = 619). Age, race, annual income, residence in EHE jurisdictions, past history of houselessness, and past history of incarceration was significantly associated with membership in some classes. In outcome modeling, participants best assigned to Class 4 had the highest mean number of insertive (Mean = 9.70, 95% CI: 5.92 - 13.47) and receptive (Mean = 8.71, 95% CI: 6.75 - 10.66) condomless anal sex (CAS) partners in the prior three months.

CONCLUSION

The six heterogenous classes may indicate discrete typologies of use behavior corresponding to different settings or activities, which may themselves differ by regional HIV incidence trends and participant demographics. Programs seeking to address substance use among MSM may be well served to tailor toward these divergent clusters of substance use.

Outness, Discrimination, and Psychological Distress Among LGBTQ+ People Living in the Southern United States

Purpose: Lesbian, gay, bisexual, transgender, queer, and other sexual and gender minority (LGBTQ+) people face mental health disparities. These disparities are amplified in the Southern regions of the United States. This study assessed the role of outness, discrimination, and other demographic variables on possible serious mental illness (SMI) among LGBTQ+ Southerners. Methods: This study used data from the 2017 LGBT Institute Southern Survey, a cross-sectional convenience sample of 6502 LGBTQ+ adults living in 14 Southern states. Multivariable logistic regression was performed to examine differences between those with and without possible SMI. Results: Outness was associated with a lower likelihood of possible SMI (odds ratio [OR]: 0.696, 95% confidence interval [CI]: 0.574-0.844, p = 0.001), especially when controlling for discrimination in the past 12 months (OR: 0.693, 95% CI: 0.576-0.834, p ≤ 0.001) and lifetime discrimination (OR: 0.678, 95% CI: 0.554-0.829, p = 0.001). Lifetime discrimination was associated with a higher likelihood of possible SMI (OR: 1.413, 95% CI: 1.034-1.932, p = 0.033), as was discrimination experienced in the past 12 months (OR: 1.626, 95% CI: 1.408-1.877, p ≤ 0.001). Black/African American respondents had the lowest percentage of possible SMI (21.0%) compared with other races, despite having lower or comparable rates of outness. Conclusion: These results indicate a possible promotive effect of outness against possible SMI among LGBTQ+ Southerners, as well as possible promotive group-level factors among Black/African American LGBTQ+ Southerners. Policies and interventions that address discrimination against LGBTQ+ Southerners should be expanded, and future research should address how the relationships between outness, discrimination, and mental health outcomes may vary by subgroup.

Latent Class Analysis of Polysubstance Use and Sexual Risk Behaviors among Men Who Have Sex with Men Attending Sexual Health Clinics in Mexico City

Men who have sex with men (MSM) are more likely to use drugs and other substances compared to their heterosexual peers. No studies have evaluated patterns of substance use among MSM adults in Mexico. We used latent class analysis (LCA) to identify MSM subgroups with specific substance use patterns and their associations with sexual behaviors. Methods: Data from 1850 adult MSM were collected at HIV clinics in Mexico City between September 2018 and December 2019. The structural equation modeling approach was used to estimate a LC model to identify patterns of substance use by self-report of substance use (i.e., cigarette smoking, alcohol, and drugs). To evaluate LC membership, we included HIV status, condomless anal sex (CAS), and serosorting, while controlling for demographic variables. Results: 30.3% were under the age of 22. Alcohol use in last 30 days (76.2%), binge drinking (29.2%), marijuana (29.4%), sex-drugs (23.9%), stimulants (13.7%), and depressants (6.3%). MSM reported engaging in CAS (55.9%) and serosorting (13.5%) behaviors, and 40% reported being HIV positive. LCA indicated three general categories of MSM substance users: Class 1 (49.0%), Class 2 (29.8%), and Class 3 (20.4%). Members of Class 3 were younger: 23–28 age years (aOR = 1.86) and 29–33 age years (aOR = 1.86), more educated: completed graduate studies (aOR = 1.60), had a high probability of polysubstance use and were more likely to engage in CAS and serosorting. Conclusions: Attempts to detect alcohol and problematic use of substances are needed for MSM followed by culturally competent approaches that address alcohol and drug use disorders.

Cultural Protection from Polysubstance Use Among Native American Adolescents and Young Adults

Reservation-based Native American youth are at disproportionate risk for high-risk substance use. The culture-as-treatment hypothesis suggests aspects of tribal culture can support prevention and healing in this context; however, the protective role of communal mastery and tribal identity have yet to be fully explored. The objectives of this study were to investigate (1) the relationship between cultural factors and high-risk substance use, which includes polysubstance use, early initiation of alcohol and illicit drugs, and binge drinking, and (2) substance use frequency and prevalence of various substances via cross-sectional design. Multiple logistic regression modeling was used to analyze data from 288 tribal members (15–24 years of age) residing on/near the Fort Peck Reservation in the Northern Plains. When controlling for childhood trauma and school attendance, having at least a high school education (OR = 0.434, p = 0.028), increased communal mastery (OR = 0.931, p = 0.007), and higher levels of tribal identity (OR = 0.579, p = 0.009) were significantly associated with lower odds of polysubstance use. Overall prevalence of polysubstance use was 50%, and binge drinking had the highest single substance prevalence (66%). Prevalence of early initiation of substances (≤ 14 years) was inhalants (70%), alcohol (61%), marijuana (74%), methamphetamine (23%), and prescription drug misuse (23%). Hydrocodone, an opioid, was the most frequently misused prescription drug. Findings indicate programs focused on promoting education engagement, communal mastery, and tribal identity may mitigate substance use for Native American adolescents living in high-risk, reservation-based settings.

Characterizing Problematic Drug Use Among Transgender Women and Cisgender Men During the Emerging HIV Crisis in the Philippines: Implications for Policy Research

Drug use and HIV are key issues for public health interventions in the Philippines. We examined associations of problematic drug use among 320 Filipinx transgender women (trans-WSM) and cisgender men who have sex with men (cis-MSM). The prevalence of exhibited problematic drug use in this sample was 29.38%. Greater odds of problematic drug use were observed among Filipinx participants who recently engaged in sex work (adjusted OR [aOR] = 2.79, 95% CI [1.08, 7.18]), reported having HIV positive and unknown status vs. negative status (aOR = 3.61, 95% CI [1.39, 9.39], and aOR = 13.99, 95% CI [2.04, 29.69], respectively), exhibited low HIV knowledge (aOR = 4.15, 95% CI [1.82, 9.44]), and displayed hazardous drinking (aOR = 2.77, 95% CI [1.21, 6.33]). Given its correlates of HIV-related indicators, integration of HIV and harm reduction services as a public health intervention could potentially decrease problematic drug use.

Risk Behaviors Associated with Patterns of Sexualized Stimulant and Alcohol Use among Men Who Have Sex with Men: a Latent Class Analysis

Substance use during sexual encounters (sexualized substance use) is an important driver of HIV and sexually transmitted infection (STI) disparities that are experienced by men who have sex with men (MSM). This analysis aimed to identify patterns of sexualized substance use and their associations with HIV risk behaviors. We utilized visit-level data from a longitudinal cohort of predominantly Black/Latinx MSM, half with HIV and half with substance use in Los Angeles, California. Every 6 months from 8/2014 to 3/2020, participants underwent STI testing and completed surveys on demographics, sexualized substance use (stimulant and/or alcohol intoxication during oral sex, receptive anal intercourse [RAI] and/or insertive anal intercourse [IAI]), transactional sex, biomedical HIV prevention (pre-/post-exposure prophylaxis use or undetectable viral load), and depressive symptoms. Latent class analysis was used to identify patterns of sexualized substance use. Multinomial logit models evaluated risk behaviors associated with latent classes. Among 2386 study visits from 540 participants, 5 classes were identified: no substance use, sexualized stimulant use, sexualized alcohol use, sexualized stimulant and alcohol use, and stimulant/alcohol use during oral sex and RAI. Compared to the no sexualized substance use class, sexualized stimulant use was associated with transactional sex, current diagnosis of STIs, not using HIV biomedical prevention, and depressive symptoms. Sexualized alcohol use had fewer associations with HIV risk behaviors. Patterns of sexual activities, and the substances that are used during those activities, confer different risk behavior profiles for HIV/STI transmission and demonstrate the potential utility of interventions that combine substance use treatment with HIV prevention.

Tina's ParTy line: Polysubstance use patterns in sexual minority men living with HIV who use methamphetamine

INTRODUCTION

This cross-sectional study examined the associations of demographic, structural and psychological factors with distinct typologies of polysubstance use in sexual minority men (SMM) living with HIV who use methamphetamine.

METHODS

In total, 161 SMM living with HIV who reported methamphetamine use in the past 3 months were recruited in San Francisco from 2013 to 2017 for a randomised controlled trial. A latent class analysis was conducted by leveraging baseline measures of self-reported use of 15 substances in the past 3 months as well as validated screening measures of hazardous alcohol and cannabis use. Correlates of latent class membership were examined using a three-step categorical latent variable logistic regression.

RESULTS

Four typologies of substance use were identified: (i) methamphetamine use only (43%); (ii) methamphetamine and crack-cocaine use (22%); (iii) party and play use-methamphetamine, gamma-hydroxybutyrate and amyl nitrites (i.e. poppers) with erectile dysfunction drugs (31%); and (iv) high polysubstance use (4%). SMM of colour and those with a history of incarceration were more commonly classified as engaging in methamphetamine and crack-cocaine use compared to party and play use. Men with higher sexual compulsivity scores were more commonly classified as engaging in party and play use and polysubstance use.

DISCUSSION AND CONCLUSIONS

There is substantial heterogeneity in polysubstance use patterns among SMM living with HIV who use methamphetamine. This will inform the development of tailored substance use interventions addressing the unique needs of SMM of colour and targeting sexual compulsivity as a prominent comorbidity for some men.

Psychological Problems Mediate the Relationship Between Minority Stress and HIV Sexual Risk Among Nigerian Men Who Have Sex with Men: Testing the Minority Stress Model

Gay, bisexual, and other men who have sex with men (GBMSM) in Nigeria bear a disproportionately higher burden of HIV. Meyer's minority stress theory posits that social stress due to the discrimination, violence, and stigma experienced by lesbian, gay, and bisexual men and women (LGBs)-due to their sexual orientation-may contribute to psychological problems, including mental health problems, substance use, and HIV sexual risk-taking. Between March and June 2019, we recruited 406 GBMSM from four states in Nigeria (Abuja, Delta, Lagos, and Plateau) to complete a cross-sectional survey at local community-based organizations. We utilized structural equation modeling to test whether psychological problems and substance use mediated the relationship between minority stress and HIV sexual risk-taking (condomless anal sex and number of sexual partners) among GBMSM in Nigeria. Minority stress (β = 0.60, 95% CI: 0.44-0.72, p ≤ .001), substance use (β = 0.43, 95% CI: 0.27-0.59, p = .004), and psychological problems (β = 0.35, 95% CI: 0.28-0.45 p = .012) had moderate associations with HIV sexual risk-taking. We found that psychological problems mediated the relationship between minority stress and HIV sexual risk-taking. Interventions focused on addressing psychological problems may help mitigate the effects of minority stress on HIV sexual risk-taking among GBMSM in Nigeria.

Substance Use Predicts Sustained Viral Suppression in a Community Cohort of Sexual and Gender Minority Youth Living with HIV

Retention in care and sustained viral suppression are integral outcomes in the care continuum for people living with HIV (PLWH) and HIV prevention; however, less is known about how substance use predicts sustained viral suppression over time. This study seeks to examine the predictive effects of substance use on sustained viral suppression in a sample of cisgender sexual minority men and gender minority PLWH (n = 163) drawn from a longitudinal sample in the Chicago area collected 2015-2019. Using data from 3 visits separated by 6 months, participants were coded persistently detectable, inconsistently virally suppressed, and consistently virally suppressed (< 40 copies/mL at all visits). Multinomial logistic regressions were utilized. About 40% of participants had sustained viral suppression. In multinomial logistic regressions, CUDIT-R predicted persistent detectable status and stimulant use was associated with inconsistent viral suppression. Substance use may create challenges in achieving sustained viral suppression, which has important implications for care and prevention.

Nursing and Health Care Preferences Among Opioid and Stimulant Using Black Sexual Minority Men: An Exploratory Study

ABSTRACT

Black sexual minority men (BSMM) experience the worst HIV treatment outcomes in the United States. Drug use increases HIV transmission risks and reduces health care engagement. Perceived health care provider stigma and medical mistrust minimizes treatment efforts. This study identified nursing and health care preferences among drug-using BSMM. In-depth qualitative interviews were conducted among 30 BSMM who reported drug use in Baltimore City, MD, from December 2018 to March 2019. Analysis identified themes as client preferences for nursing practices and gaps in clinical services. Participants' ages ranged from 23 to 63 years (M = 41.1). Most (91%) reported living with HIV. The following themes were identified as nursing and health care preferences: (a) being genuine, (b) knowing drug treatment and social services, (c) understanding drug use effects, (d) providing mental health services, and (e) clarifying treatment recommendations. Nurses and health care facilities can improve cultural competency for drug-using BSMM. Future research should identify the impact of these preferences on HIV care outcomes among BSMM.

Day-level associations between drug use and sexual behavior in male couples: Actor partner interdependence modeling of timeline follow-back data

BACKGROUND

Both marijuana and other illicit drugs (e.g., cocaine/crack, methamphetamines, ecstasy, gamma-hydroxybuterate, and ketamine) have been linked to the occurrence of condomless anal sex (CAS) with casual partners among sexual minority men (SMM) and these associations largely generalize to partnered SMM. Software advances now permit testing the day-level correspondence between participants' sexual behavior and their own drug use (actor effects) as well as their partners' (partner-effects).

METHODS

Participants comprised 50 couples (100 individuals) recruited in the New York City metro area. All were 18 or older and identified as cis male. In each couple, at least one partner was 18-29 years old, HIV-negative, reported recent (past 30 day) drug use and recent (past 30 day) CAS with a casual partner or CAS with a non-monogamous or sero-discordant main partner at screening.

RESULTS

Marijuana was associated with CAS between main partners on days both partners reported its use. A similar pattern was observed for other illicit drugs. Respondents were more likely to report CAS with casual partners on days CAS between main partners occurred. Both marijuana and other illicit drugs were associated with increased likelihood of CAS with casual partners on days a main partner did not use drugs. These associations were attenuated on days where partners reported the use of different drugs.

CONCLUSIONS

The co-occurrence of CAS with main and casual partners maximizes shared sexual risk. Results support the continued emphasis on dyadic HIV prevention interventions and the development of theoretically-based interventions that may address drug use by both partners in the relationship.

Delineating patterns of sexualized substance use and its association with sexual and mental health outcomes among young gay, bisexual and other men who have sex with men in Singapore: a latent class analysis

BACKGROUND

Young gay, bisexual, and other men who have sex with men (YMSM) are vulnerable to the risks associated with sexualized substance use. This is a novel study in Singapore that aims to classify patterns of sexualized substance use among YMSM, and investigate its association with sexual and mental health outcomes.

METHODS

In this cross-sectional study among 570 YMSM aged 18 to 25 years old, latent class analysis (LCA) conducted to identify classes with similar patterns of sexualized substance use, across which measures of inconsistent condom use, recent STI diagnoses, past suicide ideation and depression severity were compared.

RESULTS

LCA revealed three classes of YMSM based on types of substances ever used in sexualized contexts, which we labelled as 'substance-naive', 'substance-novice', and 'chemsex'. Substance-naive participants (n = 404) had only ever used alcohol, while substance-novice participants (n = 143) were primarily amyl nitrite users with a small proportion who reported using chemsex-related drugs. Chemsex participants (n = 23) comprised individuals who had mostly used such drugs. Those in the chemsex group were more likely to report recent unprotected anal sex with casual partners (aPR = 3.28, 95%CI [1.85, 5.79]), depression severity (aβ = 3.69, 95%CI [0.87, 6.51]) and a history of suicide ideation (aPR = 1.64, 95%CI [1.33, 2.03]).

CONCLUSIONS

Findings of this study highlight how the use of varying substances in sexualized contexts may be classified and characterized by different sexual and mental health outcomes. Health promotion efforts should be differentiated accordingly to address the risks associated with sexualized substance use among YMSM.

Evaluation of Drug Abuse by Hair Analysis and Self-Reported Use Among MSM Under PrEP: Results From a French Substudy of the ANRS-IPERGAY Trial

BACKGROUND

We used the Agence nationale de Recherches sur le sida et les hépatites virales (ANRS)-IPERGAY trial to qualitatively and quantitatively measure drug use among men who have sex with men under preexposure prophylaxis using 2 different methods, to better understand and collectively respond to risky practices.

METHOD

We included 69 volunteers of the ANRS-IPERGAY trial. We measured drug use by 2 methods: (1) drug detection by hair analysis and (2) reported drug use by self-reported drug consumption.

RESULTS

New psychoactive substances (NPS) and conventional drugs were detected in 53 of the 69 (77%) volunteers by hair analysis and in 39 of the 69 (57%) volunteers by questionnaires. On the 219 hair segments analyzed, the most commonly used drugs were cocaine in 47 of the 69 (68%), 3,4-methylenedioxymethamphetamine/ecstasy in 31 of the 69 (45%), and NPS in 27 of the 69 (39%). On the 1061 collected questionnaires, the most commonly used drugs were cocaine in 31 of the 69 (45%), 3,4-methylenedioxymethamphetamine/ecstasy in 29 of the 69 (42%), and NPS in 16 of the 69 (23%). Hair analysis detects more conventional drugs and/or NPS use (P < 0.05). Drug use identified by hair was significantly associated with a higher number of sexual partners in the past 2 months (P ≤ 0.001), more often casual partners (P ≤ 0.001), condomless anal sex (P ≤ 0.005), hardcore sexual practices (P ≤ 0.001), a higher number of sexually transmitted infections, and chemsex (P ≤ 0.05).

CONCLUSIONS

Self-report drug use by questionnaires remains the reference tool for harm reduction at the individual level because of its feasibility and low cost. However, hair analysis is more sensitive, objectively assessing consumption, and interesting to understand uses and to be able to collectively respond to risky practices with adapted messages.

Chemsex Practices and Health-Related Quality of Life in Spanish Men with HIV Who Have Sex with Men

Chemsex, a new risky sexual behavior involving participation in sexual relations under the influence of drugs, has shown a significantly increased prevalence in recent years. This fact entails a serious public health issue, especially when Chemsex is practiced by individuals with an HIV (Human Immunodeficiency Virus) diagnosis. Hence, analyzing the characteristics of Chemsex practices, associated sexual practices and the health outcomes of individuals who participate in Chemsex, is extremely important. The main aim of the present study is to analyze the prevalence and characteristics of the practice of Chemsex in a sample of 101 men with HIV who have sex with men who attended the Department of Infectious Diseases of the General University Hospital of Alicante (Spain). Furthermore, the association between Chemsex and Health-Related Quality of Life (HRQoL) was also assessed. Chemsex and sexual practices were evaluated by employing a questionnaire applied on an ad hoc basis. HRQoL was assessed by employing the Medical Outcomes Study HIV Health Survey (MOS-HIV). In total, 40.6% of the participants had practiced Chemsex during the last year. When sexual practices were compared between those individuals who practiced Chemsex and those who did not, the former presented a higher level of risky sexual behaviors, especially with occasional and multiple sexual partners. Regarding HRQoL, those individuals who practiced Chemsex exhibited a poorer HRQoL in the majority of domains, especially those participants who practiced it with a higher intensity. The present study points out the high prevalence of Chemsex practice between men with HIV who have sex with men in Spain. Moreover, this study highlights the negative effects of Chemsex on HRQoL, probably due to the mixed effects of higher levels of risky sexual practices and the consequences of drug consumption.

Staying or moving: Results of a latent transition analysis examining intra-individual stability of recreational substance use among MSM in the Multicenter AIDS Cohort Study from 2004 to 2016

BACKGROUND

Studies have examined patterns of substance use among Men who have Sex with Men (MSM), but few have examined factors predicting transitioning from one substance use pattern to another. We investigated transitioning from one substance use pattern to another over a 12-year period (2004-2016) among the Multicenter AIDS Cohort Study participants.

METHOD

Alcohol, marijuana, heroin, cocaine, poppers, uppers (e.g., methamphetamines) and erectile dysfunction(ED) medications use in the last 6 months from 3568 US MSM was dichotomized (no/yes) to classify participants into substance use classes at each follow up visit. We fit latent transition models to calculate transition probabilities of moving from one substance use class to another over a 3, 4 and 6-year time period. Then fit regression models to identify factors associated with the probability of each participant staying in or moving from the same substance use class.

RESULTS

Overall, cocaine and ED medication use declined but marijuana and heroin use increased over 2004-2016. We observed most participants (84.6 %-100 %) stayed in the same class. Increased age was associated with transition from the Minimal-use class to the Alcohol-only class (aOR = 1.06,95 %CI:1.01-1.13;p < 0.01) and non-White MSM reported lower odds of moving from the Alcohol-only class to the Alcohol-Popper class (aOR = 0.50,95 %CI:0.30-0.82;p <0.01). There were no difference in the transition probabilities by HIV-status.

CONCLUSION

Despite decline in substance use in general, participants are highly stable in their choice of substances. However, treating MSM as a homogeneous group can lead to an under-appreciation of the diversity of prevention needs and treatment of substance using MSM.

Substance use among sexual minorities in the US - Linked to inequalities and unmet need for mental health treatment? Results from the National Survey on Drug Use and Health (NSDUH)

BACKGROUND

Sexual minorities (SM) have specific substance use patterns and show elevated rates of substance use and substance use disorders. We investigated the potential association between substance use - including chemsex drug use - among SM adults in the United States (US) and social inequality, with an additional focus on disparities in unmet need for mental health treatment.

METHODS

A secondary cross-sectional data analysis was performed using National Survey on Drug Use and Health (NSDUH) data from 2015 to 2017 and including 126,463 individuals with 8241 identifying as SM. Multivariable logistic regression models were implemented to quantify disparities in substance use, to calculate the effect of sociodemographic variables on substance use, and to examine associations with socioeconomic vulnerability.

FINDINGS

SM showed higher odds of past-year substance use and lifetime chemsex drug use. All SM except for bisexual men exhibited higher odds of past-month binge drinking relative to heterosexuals. Bisexual women had higher odds for use of all analysed substances relative to heterosexual women. Being older and being a woman were shown to be protective factors. Urbanity, being uninsured, and unmet need for mental health treatment were associated with significantly higher odds of substance use, chemsex drug use and binge drinking. A link was established between drug use and health indicators, with higher odds of drug use for lower health ratings. SM experienced significantly higher levels of socioeconomic vulnerability. Higher vulnerability indices were associated with increased odds for drug use.

INTERPRETATION

This study is among the first nationally representative samples that analysed the link between sociodemographic factors and unmet need for mental health treatment and substance use in SM. It emphasises the multifactorial aetiology of substance use exposure, highlights the underlying mechanisms for substance use among SM while underscoring disparities among them. Approaches tailored to SM subgroups may be needed to address comorbidities and negative health outcomes of substance use in the long-term. However, critical gaps in the literature remain and large-scale studies inclusive of SM individuals are needed to present causal links.

FUNDING

Gillings Fellowship SYOG054 to ARU.

Patterns of high-risk behaviors associated with HIV among male prisoners: A latent class analysis

Background: Acquired Immunodeficiency Syndrome (AIDS) is one of the most important health challenges worldwide. Moreover, the prevalence of the Human Immunodeficiency Virus (HIV) infection differs among Iranian prisoners and the general population. The present study aimed to identify the patterns of HIV-related high-risk behaviors in male prisoners. Methods: In this cross-sectional study, 2832 inmates were examined for HIV-related high-risk behaviors. The required data were collected using a questionnaire on high-risk behaviors, including a history of heterosexual and homosexual intercourse, and a history of drug use disorders. A Latent Class Analysis (LCA) was performed to analyze the obtained data in WinLTA software. Results: Five latent classes were defined for the male prisoners, as follows: low-risk (20%), moderate-risk (23%), Injection Drug Use (IDU) (8%), heterosexual intercourse/methamphetamine use (38%), and high-risk (11%). The LCA results revealed that high-risk sexual behaviors, IDU, and sharing injection equipment in prisons significantly influence the classification. The obtained data suggested that a history of imprisonment was not frequent in class 2 (OR=1.0033, %95CI:0.9936-1.01) and class 4 members (OR=1.0053, %95CI:0.9929-1.0179). However, it was more prevalent in class 3 (OR=1.0164, %95CI:1.0068-1.0262), and 5 (OR=1.0211, %95CI:1.0129-1.0293). Heterosexual contact had the highest prevalence (75%) in this regard. The results showed that the lowest prevalence of high-risk behaviors was associated with morphine use (0.3%). Among illicit drugs, methamphetamine was the most prevalent drug (42%) in the studied subjects. Conclusion: The present study indicated a high prevalence of high-risk sexual behaviors and methamphetamine use in the investigated participants. We observed the co-occurrence of HIV-related high-risk behaviors in male prisoners. Thus, providing safe sex education for prisoners is highly recommended. It is also necessary to pursue care programs about IDU as a key risk factor for HIV transmission in prisons.

Links between chemsex and reduced mental health among Norwegian MSM and other men: results from a cross-sectional clinic survey

BACKGROUND

The use of specific drugs to facilitate, enhance or prolong sexual sessions is referred to as 'chemsex'. The popularity of the behavior seems to be growing, but there is a paucity of information on the mental health aspects associated with chemsex and no data on chemsex from Nordic countries. We investigated the link between chemsex and mental health among men who have sex with men (MSM) and other men in Norway.

METHODS

We recruited participants from a walk-in sexually transmitted infections (STI) clinic. Participants completed a piloted, anonymous self-administered survey. It consisted of questions about men's sociodemographic characteristics, mental health, sexual behaviors, substance use, and chemsex. The outcome we investigated was reduced mental health, measured with the validated Hopkins Symptom Check List. We obtained descriptive statistics and performed univariate and multivariate logistic regression analyses.

RESULTS

1013 (96%) of the surveys were complete and could be analysed. The mean age of the sample was 33, 51% were MSM, and 21.7% had reduced mental health. More MSM than other men engaged in chemsex in the past year (17% vs 12%). The most frequently reported chemsex drugs were cocaine and gamma hydroxybutyrate/gamma butyrolactone (GHB/GBL). Men engaged in chemsex primarily to enhance sexual pleasure and excitement, and about half reported almost never or never using condoms for chemsex. In univariate analyses, significant predictors of reduced mental health was chemsex (Odds Ratio [OR] = 1.82), being unemployed (OR = 3.54), and having sex with only women (OR = 0.58). In multivariate analyses, two variables remained significantly associated with reduced mental health: chemsex (adjusted OR = 2.18, 95%CI = 1.25-3.78) and being unemployed (adjusted OR = 4.10, 95%CI = 2.13-7.87).

CONCLUSIONS

In our sample of men from an STI clinic in Norway, about 14% self-reported engaging in chemsex in the past year and about a fifth of the men had reduced mental health. Men who engaged in chemsex, which more MSM engaged in than other men, had two times greater odds of reduced mental health. These findings suggest that mental health assistance should be among the interventions offered to men engaging in chemsex.

Pornography Use in Adolescents and Its Clinical Implications

(1) Background: The Differential Susceptibility to Media Effects Model (DSMM) suggests that pornography use effects are conditional and they depend on dispositional, developmental, and social differential susceptibility variables. This framework also highlights that the differential susceptibility variables act as predictors of pornography use and as moderators of the effect of pornography on criterion variables. (2) Methods: By administering a survey to n = 1500 adolescents, we tested whether these assumptions were met. (3) Results: Pornography use was related to being male and older, having a bisexual or undefined sexual orientation, higher substance use, being non-Muslim, and reporting sexual interest and the use of the media to obtain sexual information. Structural Equation Modeling (SEM) showed that higher levels in the criterion variables were directly related to pornography use, older age, substance use, and being women. Some mediational links also emerged. Pornography use mediated between the age and criterion variables. Moreover, substance use mediated the association between age and gender with the criterion variables. (4) Conclusions: Our findings support the clinical applicability of the theoretical DSMM framework. Knowing adolescent pornography consumers’ profiles and the impact of pornography on this population would allow for the designing of more effective prevention and regulation proposals.

Binge Drinking, Non-injection Drug Use, and Sexual Risk Behaviors among Adolescent Sexual Minority Males, 3 US Cities, 2015

In 2016, more than 90% of HIV diagnoses among young men aged 13-19 years were attributed to male-male sexual contact. Little is known about how binge drinking and non-injection drug use may be associated with risky sexual behavior among adolescent sexual minority males (ASMM). Using data from the National HIV Behavioral Surveillance, we examined how binge drinking and non-injection drug use may be associated with sexual risk among ASMM. ASMM were recruited for interviews in 3 cities: Chicago, New York City, and Philadelphia. Among 16-18-year-olds (N = 488), we evaluated the association between binge drinking (≥ 5 drinks in one sitting in the past 30 days), non-injection drug use (past 12-month use of methamphetamines, powder cocaine, downers, painkillers, ecstasy, poppers, and "other"), and two past 12-month sexual risk outcomes: condomless anal intercourse with a casual partner and having multiple sex partners. We used log-linked Poisson regression models with robust standard errors to estimate prevalence ratios (PR) and 95% confidence intervals (CI). Overall, 26% of 16-18-year-old ASMM binge drank, and 21% reported non-injection drug use. Among ASMM who binge drank, 34% reported condomless anal intercourse with a casual partner compared with 22% of those who did not (PR: 1.53, 95% CI: 1.04-2.26). Similarly, 84% of ASMM who binge drank reported having multiple partners compared with 61% of those who did not (PR: 1.38, 95% CI: 1.09-1.76). Among ASMM who used non-injection drugs, 37% reported condomless anal intercourse compared with 22% of those who did not (PR: 1.70, 95% CI 1.09-2.50), while 86% of those who used non-injection drugs had multiple partners compared with 62% of those who did not (PR: 1.40, 95% CI: 1.06-1.80). Our findings suggest that the prevalence of substance misuse is high among sexual minority youth and is associated with sexual risk in this population. Our findings highlight the need for high-quality HIV prevention programs for ASMM especially as HIV prevention programs for this population are scarce.

Motivations for opioid and stimulant use among drug using black sexual minority men: A life course perspective

INTRODUCTION

HIV-related disparities persist among U.S. Black sexual minority men (BSMM). Generational differences in drug use trends and the HIV/AIDS epidemic have created different risk trajectories for BSMM. This study explored age-related differences in the profiles, motivations, and contexts of opioid and stimulant use among drug using BSMM.

METHODS

Participants were recruited using active and passive strategies and in-depth qualitative interviews were conducted among 30 BSMM in Baltimore, MD from December 2018 to March 2019. Exploratory drug testing was conducted to confirm drug use and identify the presence of synthetic materials. Thematic analysis was conducted guided by Life Course theoretical domains.

RESULTS

Participants' ages ranged from 25-63 (mean age 41, SD = 12.4); 40 % were under age 35, 60 % were age 35 and older. Most (86.7 %) were living with HIV. Older BSMM attributed drug use initiation to social trends and sexual partners; younger men shared that prescription painkiller use led to misuse to address emotional pain. Across age groups, childhood sexual abuse and other major events along the life course increased BSMM's drug use as a coping strategy.

DISCUSSION AND CONCLUSION

HIV and drug use interventions should support BSMM through targeted mental health services and trauma-informed healthcare models.

P, David JK, Rajan S, Adhikary R, Arumugam E. Substance use and risk of HIV infection among Men who have Sex with Men in India: Analysis of National IBBS data, India

HIV prevalence is higher among Men who have Sex with Men (MSM), owing to their unsafe sexual behavior. Further, MSM indulge in behaviors such as consumption of alcohol/oral drugs and/or injecting during/before sex that poses the risk of unsafe behaviors, thereby increasing their vulnerability to HIV. The study aims to analyze the factors associated with HIV infection among the multi-risk MSM using any substances with those MSM who do not use substances.Community-based cross-sectional survey design using probability-based sampling between October 2014 and November 2015.For the nation-wide Integrated Biological and Behavioral Surveillance (IBBS), 23,081 MSM were recruited from 4067 hotspots in 108 districts across India. Information on demographics, sexual behaviors, substance use, sexual partners, and awareness on HIV and its management was collected from the consented respondents using computer-assisted personal interview (CAPI) by trained personnel. Blood samples were tested for HIV. Statistical analyses were done, to study the associations between substance use and its influence on high-risk sexual behaviors and HIV infection.One in 3 MSM (33.88%) in India were substance users, thus exhibiting "multi-risk" (MR) behaviors. Significantly higher HIV prevalence (3.8%, P < .05) was reported among MR-MSM, despite 97.2% of them being aware of HIV. Higher HIV prevalence among MSM exhibiting homosexual behavior for ≤1 year is of specific concern, as this accounts to recent infections and indicates the increased vulnerability of the infection among the new entrants.Substance-use resulting in high-risk sexual behavior was significantly associated with higher HIV prevalence among MR-MSM. Integrated targeted interventions focusing on safe sex and safe-IDU practices among MR-MSM are required to end the disease transmission.

Protect MSM from HIV and other sexually transmitted diseases by providing mobile health services of partner notification: protocol for a pragmatic stepped wedge cluster randomized controlled trial

Background

Recently, more and more men who have sex with men (MSM) look for casual partners through online dating platforms in China. However, most are unable to know their partners’ HIV and other sexually transmitted diseases (STD) statuses, leading to the rapid increase in HIV infection among Chinese MSM. Effective partner notification is urgently needed to increase the risk awareness of MSM and prevent HIV and other STDs transmission. However, the traditional intervention mainly targets to the HIV-positive MSM and the effect is not promising. Our study aims to provide Internet-based partner notification, along with a series of health services for HIV-negative MSM to protect them from HIV and other STDs.

Methods

A pragmatic stepped wedge cluster randomized controlled trial design is used to evaluate the effectiveness of a new intervention paradigm, which aims to reduce HIV and other STDs incidences among MSM in China. Through integrating a mobile health (mHealth) service application (app) to the current HIV and other STDs prevention and control methods, the new paradigm provides partner notification of HIV, syphilis, hepatitis B, and hepatitis C statuses. A total of 6172 MSM in 16 districts of Beijing, China will be recruited and randomized to sequentially receive partner notification intervention through the app at 6-month intervals. The primary outcomes are HIV incidence and the additional cost of the intervention. The secondary outcomes include incidences of syphilis, hepatitis B, and hepatitis C, disease transmission social networks, testing adherence, knowledge of HIV and STDs control, health self-responsibility awareness, changes of high risk behaviors and other related outcomes. The generalized linear mixed models (GLMM) will be used to analyze the differences of outcomes in the control period and in the intervention period.

Discussion

We expect that the HIV incidence will be significantly lower and the secondary outcomes will also be improved with providing health service of partner notification through mhealth intervention. The feasible and affordable public health intervention paradigm will have implications for HIV and STDs prevention and control among MSM and other key populations.

Trial registration

ClinicalTrials.gov, NCT04349748. Registered on 16 April 2020.

Creating HIV risk profiles for men in South Africa: a latent class approach using cross-sectional survey data

INTRODUCTION

Engaging at-risk men in HIV prevention programs and services is a current priority, yet there are few effective ways to identify which men are at highest risk or how to best reach them. In this study we generated multi-factor profiles of HIV acquisition/transmission risk for men in Durban, South Africa, to help inform targeted programming and service delivery.

METHODS

Data come from surveys with 947 men ages 20 to 40 conducted in two informal settlements from May to September 2017. Using latent class analysis (LCA), which detects a small set of underlying groups based on multiple dimensions, we identified classes based on nine HIV risk factors and socio-demographic characteristics. We then compared HIV service use between the classes.

RESULTS

We identified four latent classes, with good model fit statistics. The older high-risk class (20% of the sample; mean age 36) were more likely married/cohabiting and employed, with multiple sexual partners, substantial age-disparity with partners (eight years younger on-average), transactional relationships (including more resource-intensive forms like paying for partner's rent), and hazardous drinking. The younger high-risk class (24%; mean age 27) were likely unmarried and employed, with the highest probability of multiple partners in the last year (including 42% with 5+ partners), transactional relationships (less resource-intensive, e.g., clothes/transportation), hazardous drinking, and inequitable gender views. The younger moderate-risk class (36%; mean age 23) were most likely unmarried, unemployed technical college/university students/graduates. They had a relatively high probability of multiple partners and transactional relationships (less resource-intensive), and moderate hazardous drinking. Finally, the older low-risk class (20%; mean age 29) were more likely married/cohabiting, employed, and highly gender-equitable, with few partners and limited transactional relationships. Circumcision (status) was higher among the younger moderate-risk class than either high-risk class (p < 0.001). HIV testing and treatment literacy score were suboptimal and did not differ across classes.

CONCLUSIONS

Distinct HIV risk profiles among men were identified. Interventions should focus on reaching the highest-risk profiles who, despite their elevated risk, were less or no more likely than the lower-risk to use HIV services. By enabling a more synergistic understanding of subgroups, LCA has potential to enable more strategic, data-driven programming and evaluation.

Sexual risk and sexual healthcare utilization profiles among Black sexual minority men in the U.S. Deep South

Black gay, bisexual, and other Black sexual minority men (BSMM) continue to experience negative health outcomes along the HIV prevention and treatment continuum, especially in the U.S. Deep South. The purpose of this study is to identify sexual risk and healthcare utilization profiles behaviors among BSMM in the Deep South. Guided by the Behavioral Model for Vulnerable Populations, latent class analysis was used to identify sexual risk and healthcare utilization profiles using data from 348 individuals in Jackson, MS and Atlanta, GA. Multinomial logistic regression was used to identify the correlates of class membership. A 3-class solution was identified: Class 1 (Substance using, Low Testers); Class 2 (Condom using testers), and Class 3 (Casual Partner Testers). Class 1 had the highest conditional probabilities of drug (75%) and alcohol (84%) use before sex and the lowest probability of STI and HIV testing. Class 2 had the highest probabilities of condom use and a 65% probability of seeing a healthcare provider. Class 3 had the highest probability of inconsistent condom use and seeing a healthcare provider in the previous 12 months (76%). Findings support the need for targeted interventions tailored to BSMM of different sexual risk and healthcare utilization behaviors.

Vulnerability profiles and prevalence of HIV and other sexually transmitted infections among adolescent girls and young women in Ethiopia: A latent class analysis

Background

Adolescent girls and young women (AGYW) aged 15–24 years have among the highest risk for HIV and other sexually transmitted infections (STI) across sub-Saharan Africa. A latent class analysis (LCA) was conducted to identify intersecting social- and structural-level determinants of HIV/STI acquisition among AGYW in Ethiopia.

Methods

AGYW were recruited from venues using time-location sampling, completing an interviewer-administered behavioral survey and biological testing for HIV, syphilis, and chlamydia. LCA was used to identify distinct groups, defined by social- and structural-level determinants of HIV/STI risk, among AGYW. Prevalence ratios (PR) and 95% confidence intervals (CI) compared differences in HIV/STI prevalence by group.

Results

A total of 1,501 AGYW were enrolled across Addis Ababa (March–May 2018) and Gambella (June–July 2019). We identified three patterns of vulnerability defined by schooling status, migration history, food insecurity, orphan status, social support, and employment. We labeled these groups as “highly vulnerable” (representing ~21% of the population), “stable, out-of-school, migrated” (~42%), and “stable, in-school, never migrated” (~37%). STI prevalence was nearly two-fold higher among AGYW in the “highly vulnerable” group compared to AGYW in the “stable, in-school, never migrated” group (PR 1.93; 95% CI 1.33, 2.80).

Conclusions

Characterizing patterns of vulnerability among AGYW that reflect higher-level social and structural factors can help facilitate early identification of AGYW at the highest risk of HIV/STI acquisition, thus differentiating groups of AGYW who may most benefit from targeted HIV prevention interventions during adolescence and early adulthood.

Substance use patterns and awareness of biomedical HIV prevention strategies among sexual and gender minority men in Canada

Sexual and gender minority men (SGMM) who use drugs are frequently cited as at-risk for HIV. Fortunately, biomedical prevention can greatly reduce transmission, provided individuals are aware of and interested in the uptake of these strategies. We examined associations between substance use patterns and biomedical prevention among SGMM in Canada. Latent class analysis identified patterns of substance use. Demographic-adjusted logistic regression models assessed the associations between latent classes and key biomedical prevention indicators. Among 669 participants living with HIV (PLWH) and 7,184 HIV-negative participants, six substance use classes characterized "limited" (46.0%; infrequent/low use of drugs), "common" (31.9%; alcohol, cannabis, and tobacco), "club" (5.2%; alcohol, cocaine, and psychedelics), "sex" (4.8%; alcohol, crystal methamphetamine, GHB, poppers, and erectile drugs), "prescription" (11.0%; alcohol and prescription drugs), and "polydrug" (1.1%; most drugs) use. HIV-negative men in the "prescription" and "sex" substance use classes were more likely to know about the preventive benefits of HIV treatment. All non-"limited use" HIV-negative men were more likely to report interest in taking pre-exposure prophylaxis (PrEP). For PLWH, substance use patterns were not associated with detectable viral loads or treatment awareness. While PLWH exhibited high levels of undetectability and treatment awareness regardless of substance use class, a variety of substance use patterns were associated with increased awareness, interest, and uptake of risk management strategies among HIV-negative participants.

Identification and characterization of latent classes based on drug use among men who have sex with men at risk of sexually transmitted infections in Amsterdam, the Netherlands

BACKGROUND AND AIMS

Men who have sex with men (MSM) are at high risk for both drug use and sexually transmitted infections (STI). We aimed to (1) identify subgroups of drug use during sex among MSM in Amsterdam and after classifying participants and (2) compare sexual behaviour and STI across groups.

DESIGN

Cross-sectional study. Latent class analysis was used to identify subgroups with similar drug use patterns, between which sexual behaviour and STI prevalence were compared.

SETTING

Four different studies conducted at the STI out-patient clinic in Amsterdam, the Netherlands, between January 2014 and June 2016.

PARTICIPANTS

A total of 1130 self-declared MSM, aged ≥ 18 years.

MEASUREMENTS

Self-reported drug use, laboratory-confirmed STI, socio-demographics, sexual behaviour (including number of partners), condom use.

FINDINGS

Median age was 40 years [interquartile range (IQR) = 32-47]. We identified five latent classes of users, which we labelled: 'no substance' (n = 162), 'alcohol' (n = 159), 'nitrites and erectile dysfunction drugs (EDD)' (n = 286), 'polydrug' (n = 257) and 'chems' (n = 266). Median number of sex partners significantly differed across classes (P < 0.001), ranging from two (IQR = 1-6) in the 'no substance' class to 20 (IQR = 10-45) in the 'chems' class. The proportion of MSM reporting condomless anal sex also differed across classes (P < 0.001), ranging from 45.6% in the 'no substance' class to 86.5% in the 'chems' class. Compared with the 'no substance' class, the odds of STI were 3.9-fold [95% confidence interval (CI) = 1.1-14.4] higher in the 'alcohol' class, 8.9-fold (95% CI = 2.7-29.2) higher in the 'nitrites and EDD' class, 12.8-fold (95% CI = 3.9-41.9) higher in the 'polydrug' class and 15.0-fold (95% CI = 4.6-48.8) higher in the 'chems' class.

CONCLUSION

There are five distinct classes of drug use in a sexual context among men who have sex with men in Amsterdam, the Netherlands. Classes with higher levels of drug use appear to coincide with higher levels of sexual risk behaviour and sexually transmitted infections.

Sex, drugs, and sexually transmitted infections: A latent class analysis among men who have sex with men in Amsterdam and surrounding urban regions, the Netherlands

BACKGROUND

Men who have sex with men (MSM) are at high risk for sexually transmitted infections (STI) and often have sex while under the influence of drugs (sexualized drug use). We aimed to identify classes of MSM in Amsterdam and in surrounding urban regions with distinctive patterns of sexualized drug use and their association with STI.

METHODS

In this cross-sectional study, data on MSM were collected at STI clinics in the Netherlands between September-December 2017. Information on drug use, sociodemographics and sexual risk behavior, including lab-confirmed STI (chlamydia, gonorrhea, syphilis and HIV) was collected and compared between Amsterdam and surrounding urban regions. Latent class analysis was used to identify classes with similar drug use patterns, which were then linked to sexual behavior and STI.

RESULTS

We included 4461 MSM who were a median 35 years old (IQR = 27-47) and mostly Dutch (56.9 %). Use of all drugs was more often reported in Amsterdam compared to surrounding regions (p<0.001). We identified four different classes based on sexualized drug use among Amsterdam participants and three classes in surrounding regions. In both regions, polydrug use classes (compared to classes of no drug use; alcohol use; or few, various drugs) were defined by higher numbers of sexual partners (median range 8-15 vs 4-6, respectively) and higher STI prevalence (range 30.5%-31.8% vs 18.6%-22.8%, respectively).

CONCLUSION

Given the high prevalence of risk behavior and STIs, MSM in urban settings partaking in sexualized polydrug use might benefit from tailored outreach, screening, and safe sex and drug use interventions.

Stimulant Use and Study Protocol Completion: Assessing the Ability of Men Who Have Sex with Men to Collect Dried Blood Spots for Laboratory Measurement of HIV Viral Load

Stimulant use is associated with higher HIV viral load (VL) and sexual HIV transmission risk among men who have sex with men (MSM) living with HIV. There is little research on willingness of drug users living with HIV to fully participate in studies, especially those involving self-collection of biomarker data. This study presents findings from an at-home dried blood spot collection study measuring laboratory-quantified VL among U.S. HIV-positive MSM who reported high-risk sexual behavior and/or suboptimal antiretroviral therapy (ART) adherence to assess the association between drug-use behavior and (1) ability to complete a study protocol and (2) VL outcomes. Among recruited participants (n = 766), 35% reported stimulant drug use (amphetamines, cocaine, crack, crystal meth, ecstasy, or a combination of stimulant drugs), 39% reported using other drugs (heroin, marijuana, prescription opioids, and others), and 27% reported no drug use in the past 3 months. In all, 61% of enrolled participants completed the study protocol. Stimulant drug users were less likely (ARR 0.84; 95% CI 0.72-0.98) to complete the protocol than other drug users. Furthermore, other drug users were significantly less likely than non-drug users (ARR 0.52; 95% CI 0.28-0.97) to have an HIV VL result ≥ 1500 copies/mL. This study provides important estimates regarding the likelihood of participation in biomedical research activities among HIV-positive MSM with varying drug-use behaviors, showing that it is feasible to conduct such biomedical studies with drug-using MSM who report high-risk sexual behavior and struggle with their ART adherence.

The Utility of Index Case Recruitment for Establishing Couples' Eligibility: An Examination of Consistency in Reporting the Drug Use of a Primary Partner Among Sexual Minority Male Couples

Sexual minority men are disproportionately impacted by substance use, which is associated with greater HIV transmission behaviors. Novel approaches to drug use prevention and treatment are needed. Couple-based approaches have garnered significant attention. The recruitment of couples into substance use interventions has proven challenging. We evaluate an index-case approach to screening participants in couples' research. Seventy index cases, aged 18-29, and their main partner (140 individuals), were recruited. At screening, index participants reported their drug use and their partners' drug use for the previous 30 days. At baseline, both partners reported their drug use over the past 30 days. Individuals' self-reports and perceptions of their partner's concurrency were compared within couples using the κ (Kappa) coefficient. We found high levels of personal predictive accuracy from screening to baseline for cannabis (κ = .81, p < .01) and cocaine/crack (κ = .70, p < .01). Predictive accuracy of index case reporting of their partner's drug use behavior were moderately high among cocaine/crack use (κ = .68, p < .01) and MDMA/GHB/Ketamine (κ = .56, p < .01). Perceived partner similarity for recent drug use was also high for all drugs, with the highest levels among cocaine/crack (κ =.82) and prescription drugs (κ =.81). This study demonstrates that index partners report drug use with differing levels of agreement between drug types. Index recruitment has advantages in determining drug use-related eligibility requirements. Discrepancies in reporting were more frequently false positives, which reduces the risk of screening out potentially eligible couples.

Delineation of chemsex patterns of men who have sex with men in association with their sexual networks and linkage to HIV prevention

BACKGROUND

Previous studies have shown that men who have sex with men (MSM) and who engage in drug use in sexualized contexts (chemsex) were more likely to be HIV positive. Their social networks and adoption of HIV prevention measures have, however, not been fully investigated. We aim to compare the sexual behavior, HIV prevention efforts and social networks of MSM by the intensity and patterns of their drug use.

METHODS

Data from respondents of a community-based, cross-sectional survey (PRiSM) conducted among MSM in Hong Kong in 2017 were collected retrospectively. Characteristics of MSM engaged and not engaged in chemsex were compared in logistic regressions, delineated by latent class analysis (LCA) and compared in multinominal logistic regression.

FINDINGS

Of 4133 respondents, 3044 were sexually active with an HIV prevalence of 6.5%. The prevalence of chemsex engagement in the preceding 6 months was 12%, after excluding use of poppers or erectile dysfunction agents (EDA) alone. Four types of drug user were identified by LCA: Minimal (mainly poppers), low-threshold (mainly poppers and EDA), medium-threshold (mainly methamphetamine, GHB, poppers and EDA) and intense (extensive use of different types of drug). Medium-threshold and intense drug users were more likely to be HIV positive, be diagnosed with sexually transmitted infections, make gay friends through mobile apps and sex parties, and intend to take pre-exposure prophylaxis (PrEP). Medium-threshold drug users had a more influential role in their social network, as shown by their higher centrality in mobile apps network.

CONCLUSION

Chemsex engagement in MSM is significantly associated with HIV infection in Hong Kong. The HIV transmission risk could however be offset by the inclination of MSM belonging to medium-threshold and intense drug users to take PrEP, should the intervention become accessible to the community. Further mobile apps could be a good channel to access MSM who are medium-threshold drug users.

Predictors of empirically derived substance use patterns among sexual minority groups presenting at an emergency department

AIM

Minority sexual orientation (i.e., Lesbian, Gay, Bisexual; LGB) is a risk indicator for mental health and substance use problems. Findings are inconsistent across studies investigating LGB substance use and risk factors, possibly due to heterogeneity in LGB subgroups. To inform models of substance use risk, we identified empirical patterns of substance use and related risk behaviors among LGB individuals.

METHOD

LGB participants (N = 343; Mage = 35.5, SD = 11.8; 71.4% = Female; 80.5% = White) were screened in an Emergency Department as part of a randomized controlled trial of an alcohol brief intervention. We conducted latent class analyses using the AUDIT-C (12 month; frequency, quantity, & binge) and ASSIST (12 month; illicit or misused prescription substance). Multinomial regression was performed to test predictors of class membership including depression symptoms, driving after alcohol or marijuana, and sexually transmitted infection (STI) history.

RESULTS

A 3-class model fit best and included "low use alcohol, marijuana, and tobacco users," (Low use; n = 244) "hazardous alcohol, tobacco and marijuana users," (Hazardous; n = 74) and "high-risk polysubstance users" (HPU; n = 25). The Low use class comprised the largest proportion of the sample across age, race/ethnicity, and sexual orientation. Compared to the Low use class, higher likelihood of depression symptoms, driving after alcohol or marijuana use, and STI was found for both Hazardous and HPU classes.

CONCLUSION

Researchers and clinicians should consider substance use patterns within the LGB population to inform interventions that address a variety of complex needs such as allocating more support for LGB individuals endorsing high-risk polysubstance use.

Perceived barriers to pre-exposure prophylaxis use among HIV-negative men who have sex with men in Tijuana, Mexico: A latent class analysis

BACKGROUND

Given the slow uptake of PrEP among cisgender men who have sex with men (MSM) in high-income countries, efforts to roll-out PrEP in low- and middle-income countries (LMIC) should address barriers to PrEP use to facilitate its more rapid uptake. To inform PrEP programs in LMIC, we examined patterns of perceived barriers to PrEP use among HIV-negative MSM in Tijuana, Mexico.

METHODS

From 03/2016-09/2017, 364 MSM completed interviewer-administered surveys assessing perceived barriers to PrEP use across 4 domains: PrEP attribute, individual, interpersonal, and structural. Latent class analysis was performed to identify distinct classes with respect to perceived barriers to PrEP use. Multinomial logistic regression was used to identify factors associated with class membership.

RESULTS

We identified three classes characterized by (1) high levels of perceived barriers across domains (12%), (2) low levels of perceived barriers across domains (43%), and (3) perceived PrEP attribute barriers (i.e., side-effects and cost) (45%). Membership in the high level of perceived barriers class (vs. the low level of perceived barriers class) was positively associated with having a history of incarceration (AOR: 2.44; 95% CI: 1.04, 5.73) and negatively associated with more social support (AOR: 0.99; 95% CI: 0.98, 1.00). Membership in the perceived PrEP attribute barriers class was positively associated with having seen a healthcare provider in the past year (AOR: 2.78; 95% CI: 1.41, 5.45) and negatively associated with having any HIV-positive or status unknown partners (AOR: 0.56; 95% CI: 0.31, 1.01).

CONCLUSIONS

Since most participants were in either the low level of perceived barriers class or the perceived PrEP attribute barriers class, future PrEP uptake may be high among MSM in Tijuana. However, these findings suggest that achieving sufficient PrEP uptake and adherence among MSM in Tijuana may require a range of comprehensive HIV prevention interventions.

Changes in chemsex and sexual behaviour over time, among a cohort of MSM in London and Brighton: Findings from the AURAH2 study

BACKGROUND

Recent evidence has suggested that chemsex (the use of mephedrone, crystal methamphetamine and γ -hydroxybutyrate/ γ -butryolactone (GHB/GBL) to enable, enhance and prolong sexual interactions) has increased among men having sex with men (MSM) attending sexual health clinics in large UK cities. To date there has been no data from the UK or Europe that describes changes in chemsex over time within a cohort of MSM.

METHODS

The prospective cohort study, Attitudes to and Understanding Risk of Acquisition of HIV over Time (AURAH2), collected online questionnaire data from HIV negative or undiagnosed MSM (at enrolment) from 2015 to 2018, recruited from sexual health clinics. We aim to investigate changes in chemsex, three individual drugs associated with chemsex, frequency of chemsex sessions and measures of sexual behaviour, among the cohort of MSM over the study's 3 year follow-up period.

RESULTS

In total 622 MSM completed at least one online questionnaire for the AURAH2 study, of which 400 (64.3%) were still engaged with the study within the last six months of follow-up. Prevalence of chemsex significantly declined during the follow-up from 31.8% (198/622) at the first online questionnaire, to 11.1% (8/72; p < 0.001) at the 9th. This decline was reflected in the proportion of MSM reporting use of two of the three individual chemsex drugs: mephedrone use had significantly declined from 25.2% at the first online questionnaire to 9.7% (p < 0.001) at the 9th, GHB/GBL use had also declined from 19.9% to 8.3% (p = 0.001). While crystal methamphetamine use declined, but not significantly (11.1%-6.9% [p = 0.289]). Most measures of sexual behaviour (any anal sex, group sex, recent HIV test and bacterial STI) also tended to decline over the follow-up period, with the exception of CLAI with more than one and more than two partners.

CONCLUSIONS

Chemsex and use of two individual chemsex drugs (mephedrone and GHB/GBL) significantly declined over time among individuals in the study, alongside most measures of sexual behaviour with the exception of those related to CLAI. Focusing health promotion and HIV prevention, such as awareness of post-exposure prophylaxis (PEP) and access to pre-exposure prophylaxis (PrEP), on MSM that report chemsex, and in particular problematic chemsex, would be highly beneficial, potentially only necessary for a relatively short period of time for individuals, and could have long term benefits for HIV and STI prevention.

Perceived social support, problematic drug use behaviors, and depression among prescription drugs-misusing young men who have sex with men

This study examined the relationship of perceived social support with problematic drug use behaviors and depression among young men who have sex with men (YMSM). A diverse sample of 191 substance-using YMSM (aged 18-29 years) reported on perceived social support, high-risk drug use behaviors (i.e., polydrug use and use of drugs before sex in the past 6 months, and lifetime injection drug use), and depression. Associations were examined using bivariate and multivariable logistic regression. Participants receiving higher levels of family social support were at lower odds of reporting polydrug use, drug use before sex, and depressive symptomology. Individuals with higher levels of friends' social support were at lower odds of reporting polydrug use, drug use before sex, and depression. Participants receiving higher levels of support from a special other were at lower odds of reporting depression. Intervention efforts should address YMSM's capacity to build supportive relationships and obtain adequate social support.

Polydrug use patterns and their impact on relapse among heroin-dependent patients in Shanghai, China

AIMS

To describe the polysubstance use patterns of heroin-dependent patients and to understand the impact of polysubstance use patterns on relapse during the 5 years after completing compulsory rehabilitation programmes.

DESIGN

In this secondary analysis, the baseline data of 503 heroin-dependent patients were linked with their 5-year follow-up data from official records.

SETTING

Four compulsory rehabilitation centres in Shanghai, China.

PARTICIPANTS

A total of 564 heroin-dependent patients who were discharged from Shanghai compulsory rehabilitation facilities in 2007 and 2008 were recruited. Among these, 503 patients with available follow-up records were included in this analysis.

MEASUREMENTS

The baseline measurements included the Addiction Severity Index, the Temperament and Character Inventory and the Medical Outcomes Study Social Support Scale. Relapses after discharge from the compulsory rehabilitation centres were extracted monthly from the official electronic record system. Latent class analysis was used to identify different polysubstance use patterns. Associations between the identified latent classes and heroin use and the factors related to relapse during the 5-year follow-up were analysed with the Cox regression model.

FINDINGS

Three latent classes were identified in this cohort: (1) alcohol polydrug users (APU; 13.7%), (2) low polydrug users (LPU; 76.5%) and (3) amphetamine-type stimulant polydrug users (ASPU; 9.7%). During the 5-year follow-up, 298 heroin patients relapsed, and the three groups showed different relapse rates (ASPU 69.4 versus LPU 60.5 versus APU 44.9%, P = 0.02). The average durations of abstinence for the three groups differed (ASPU 31.27 ± 3.41 months versus LPU 36.77 ± 1.19 months versus APU 42.46 ± 2.81 months, P = 0.02). Multivariate Cox regression analyses found that the LPU [hazard ratio (HR) = 1.63, 1.06-2.51] and ASPU (HR = 2.10, 1.24-3.56) classes were positively associated with the risk of heroin relapse.

CONCLUSION

Polydrug use patterns differ among heroin-dependent patients in compulsory rehabilitation programmes in China. A history of polydrug use may predict heroin relapse risk among patients in those compulsory rehabilitation programmes.

Chemsex behaviours among men who have sex with men: A systematic review of the literature

BACKGROUND

'Chemsex' is the use of drugs before or during planned sexual events to facilitate, enhance, prolong and sustain the experience. Drugs associated with chemsex are methamphetamine, GHB/GBL, mephedrone, cocaine and ketamine. This review syntheses published research on the antecedents, behaviours and consequences associated with chemsex behaviours among men who have sex with men (MSM).

METHODS

Papers from high income countries which were published between January 2000 and September 2018 reporting the use of chemsex drugs before or during sex were identified through Medline, Web of Science, CINAHL and Central. Results were synthesised using a narrative approach and conceptualised using a behavioural analysis framework.

RESULTS

The search identified 2492 publications, of which 38 were included in the final synthesis. There were wide variations in chemsex prevalence estimates due to the heterogeneous sampling in the studies. Chemsex participants have expectations that the drugs will positively affect their sexual encounters and HIV positive MSM are more likely to engage in the behaviour than HIV negative MSM. There were wide ranging prevalence estimates on injecting drugs for sexual purposes and the sharing of injecting equipment with some evidence of unsafe injecting practices. Participants were more likely to engage in condomless anal intercourse than men who do not engage in chemsex. This may increase the risk of transmission for HIV and other sexually transmitted infections.

CONCLUSION

A minority of MSM appear to engage in chemsex behaviours but they are at risk of this negatively impacting on their health and well-being. Further research is required to examine high risk chemsex behaviours, impact of chemsex on psycho-social well-being and if chemsex influences uptake of PrEP, PEP and sexual health screening.

A latent class analysis of substance use and culture among gay, bisexual and other men who have sex with men

Assessments of gay and bisexual men's substance use often obscures salient sociocultural and identity-related experiences related to how they use drugs. Latent class analysis was used to examine how patterns of substance use represent the social, economic and identity-related experiences of this population. Participants were sexually active gay and bisexual men (including other men who have sex with men), aged ≥ 16 years, living in Metro Vancouver (n = 774). LCA indicators included all substances used in the past six months self-reported by more than 30 men. Model selection was made with consideration to model parsimony, interpretability and optimisation of statistical criteria. Multinomial regression identified factors associated with class membership. A six-class solution was identified representing: 'assorted drug use' (4.5%); 'club drug use' (9.5%); 'street drug use' (12.1%); 'sex drug use' (11.4%); 'conventional drug use' (i.e. tobacco, alcohol, marijuana; 25.9%); and 'limited drug use' (36.7%). Factors associated with class membership included age, sexual orientation, annual income, occupation, income from drug sales, housing stability, group sex event participation, gay bars/clubs attendance, sensation seeking and escape motivation. These results highlight the need for programmes and policies that seek to lessen social disparities and account for social distinctions among this population.

Differentially classified methamphetamine-using men who have sex with men: A latent class analysis

CONTEXT

Substance use interventions for methamphetamine-using men who have sex with men (MSM) are limited by the assumption that they are a uniform group. We hypothesized that an LCA would identify distinct patterns of substance use and demographic and psychosocial variables associated with different substance-using groups would aid in understanding distinctions. Using cross-sectional data from 343 methamphetamine-using MSM, we conducted an LCA to model the patterns of polysubstance use then examined how the classes varied on psychosocial variables defined by the Information-Motivation-Behavioral Skills (IMB) model.

FINDINGS

Because we were interested in identifying patterns of polysubstance use (PSU) among our sample, we identified four classes: minimal PSU, marijuana PSU, cocaine/hallucinogens PSU, and designer drugs/heroin PSU. Men in the marijuana PSU class were less likely to have positive attitudes towards methamphetamine than participants in the other three classes. Men in the Cocaine and Hallucinogens PSU class were more likely to have higher PANAS scores (OR = 13.00 [3.25, 52.07]) compared to the other classes, and they were more likely to have higher self-efficacy to enact safer substance use strategies (OR = 10.72 [3.23, 35.47]). MSM in the Designer Drug and Heroin PSU class were more likely to have a diagnosis of Hepatitis B (OR = 4.07 [0.86, 19.36] despite having higher knowledge of sexual health practices (OR = 0.55 [0.36, 0.84].

CONCLUSIONS

Differential classification for methamphetamine-using MSM suggests an opportunity for tailored interventions and secondary prevention programs. By understanding how men vary on illicit substance use, interventionists can routinely screen and link men before they potentially progress to another classification.

Chemsex among gay, bisexual, and other men who have sex with men in Singapore and the challenges ahead: A qualitative study

BACKGROUND

Sexualised substance use, or 'chemsex' has been shown to be a major factor driving the syndemic of HIV/AIDS in communities of gay, bisexual, and other men who have sex with men (GBMSM) around the world. However, there is a paucity of research on chemsex among GBMSM in Singapore due to punitive drug laws and the criminalisation of sexual behaviour between men. This qualitative descriptive study is the first to explore perceptions towards, motivators to engaging in, and the barriers to addressing the harms associated with chemsex among GBMSM in Singapore.

METHODS

We conducted 30 semi-structured in-depth interviews with self-identifying GBMSM between the ages of 18-39 in Singapore following a purposive sampling strategy. Interview topics included participants' perceptions of drug use among GBMSM in Singapore, perceptions towards chemsex, reasons for drug use and chemsex, and recommendations to address the harms associated with chemsex in Singapore. Interviews were audio-recorded, transcribed, coded, and analysed using thematic analysis.

RESULTS

Participants reported that it was common to encounter chemsex among GBMSM in Singapore as it could be easily accessed or initiated using social networking phone apps. Enhancement and prolongation of sexual experiences, fear of rejection from sexual partners and peers, and its use as a means of coping with societal rejection were three main reasons cited for engaging in chemsex. The impact of punitive drug laws on disclosure and stigmatisation of GBMSM who use drugs were reported to be key barriers towards addressing chemsex. Participants suggested using gay-specific commercial venues as avenues for awareness and educational campaigns, and social media to reach out to younger GBMSM.

CONCLUSIONS

This study highlights the complexities behind chemsex use among GBMSM in Singapore, and the range of individual to institutional factors to be addressed. We recommend that community-based organisations and policy-makers find ways to destigmatise discussion of chemsex and provide safe spaces to seek help for drug use.