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

Cheung DH, Samoh N, Jonas KJ, Lim SH, Kongjareon Y, Guadamuz TE

Arch Sex Behav, 2024 Oct;53(9):3527-3536.
PMID: 39150645 DOI: 10.1007/s10508-024-02868-8

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

Matched MeSH terms: Unsafe Sex/statistics & numerical data
Brief Report: Depression, Substance Use, and Factors Associated With Sexual Risk Behaviors Among Adults Living With HIV in the Asia-Pacific Region

Ross JL, Teeraananchai S, Avihingsanon A, Lee MP, Ditangco R, Rajasuriar R, et al.

J Acquir Immune Defic Syndr, 2024 Aug 15;96(5):421-428.
PMID: 39564477 DOI: 10.1097/qai.0000000000003446

BACKGROUND: Mental health and substance use disorders are common among people living with HIV and are associated with high-risk sexual behaviors, such as unprotected sex and multiple sexual partners, but Asia-Pacific data are limited.
METHODS: Adult PLHIV in care at five Asia-Pacific HIV clinics were enrolled at routine clinic visits between July 2019 and June 2020. Depression, substance use, sexual practice and socio-demographic data were collected using PHQ-9, ASSIST, and a study-specific questionnaire. Clinical data were accessed from medical records. Risk factors for medium- to high-risk sexual practices, defined based on total scores from the sexual practice questionnaire assessing number of sexual partners and condom use, were analyzed using logistic regression. Moderate to severe depression was defined as a PHQ-9 score >9, and moderate- to high-risk substance use as an ASSIST score ≥11 for alcohol or ≥4 for other substances.
RESULTS: Among 723 participants, median age was 38 years, 89% were male, 99% were on ART and 37% had medium- to high-risk sexual practices. Medium- to high-risk sexual practices were more common among those ≤30 years old, unemployed, and HIV status disclosed, and were more likely in participants with moderate to severe depression (aOR 2.09, 95%CI 1.17-3.74) compared to none to minimal depression, and moderate- to high-risk substance use (aOR 1.73, 95%CI 1.23-2.44) compared to those without.
CONCLUSIONS: Further integration of comprehensive sexual risk reduction strategies, mental health services and substance use harm reduction within HIV clinical settings in the region is needed.

Matched MeSH terms: Unsafe Sex/statistics & numerical data
Factors associated with unprotected receptive anal intercourse with internal ejaculation among men who have sex with men in a large Internet sample from Asia

Lim SH, Guadamuz TE, Wei C, Chan R, Koe S

AIDS Behav, 2012 Oct;16(7):1979-87.
PMID: 22714116

We examined socio-demographic and behavioral characteristics of men who have sex with men (MSM) residing in Asia and correlates of unprotected receptive intercourse with Internet ejaculation (URAIE). Asia Internet MSM Sex Survey, a behavioral survey of MSM in Asia was conducted from 1 January to 28 February 2010. Data analysis was limited to participants aged 18 or above, biological male, and had one regular or casual sex partner in the past 6 months (n = 10,413). Pearson's Chi-square test, t test and logistic regression were used to examine the correlates of URAIE in the past 6 months, the highest risk sexual behavior sampled. Of 7311 participants who had receptive anal intercourse, 47.5 % had URAIE, which was associated with the following attributes: less than high-school education and pre-college education compared to university (AOR = 1.53, 95 % CI: 1.28, 1.83; AOR = 1.22, CI: 1.08, 1.37), being in the heterosexual marriage (AOR = 1.35, CI: 1.18, 1.56), having regular partners or both regular and casual partners compared to having casual partners (AOR = 2.85, CI: 2.48, 3.27; AOR = 2.32, CI: 2.06, 2.62), HIV-positive compared to HIV-negative status (AOR = 1.39, 95 % CI: 1.08, 1.81), higher perception of HIV risk (AOR = 1.62, CI: 1.34, 1.95), use of recreational drug before sex (AOR = 1.30, CI: 1.14, 1.49), and use of the Internet as the main way to seek sex partners (AOR = 1.21, CI: 1.08, 1.36). MSM from certain Asian countries reported alarming rates of URAIE. The internet can be used as a platform for HIV surveillance and intervention.

Matched MeSH terms: Unsafe Sex/statistics & numerical data*
High rates of unprotected anal intercourse with regular and casual partners and associated risk factors in a sample of ethnic Malay men who have sex with men (MSM) in Penang, Malaysia

Lim SH, Bazazi AR, Sim C, Choo M, Altice FL, Kamarulzaman A

Sex Transm Infect, 2013 Dec;89(8):642-9.
PMID: 23787168 DOI: 10.1136/sextrans-2012-050995

OBJECTIVE: To assess the prevalence of unprotected anal intercourse (UAI) and its correlates among ethnic Malay men who have sex with men (MSM).
METHODS: In 2010, a convenience sample of 350 MSM in Penang were recruited to participate in an anonymous, computerised survey with rapid HIV testing. Participants who were not of Malay ethnicity (n=44) or who did not report sex with another man in the previous 12 months (n=22) were excluded, resulting in 284 participants in the final analysis. Correlates of UAI were examined separately for regular and casual partnerships using bivariate and multivariate logistic regression.
RESULTS: Four men (1.9%) tested HIV positive. In the past 12 months, 64.7% of participants had regular sexual partners, 77.1% had casual sexual partners and 41.9% had both. Most participants (83.1%) reported UAI, which was more common in regular partnerships. Over two-thirds of participants had never been tested for HIV. In multivariate analysis, agreement about sexual risk reduction practices was associated with a reduction in UAI with regular partners (adjusted OR (AOR)=0.14, 95% CI 0.05 to 0.40). Reporting difficulty in using condoms was associated with an increase in UAI with casual partners (AOR=9.07, 95% CI 3.35 to 24.5), and any exposure to HIV prevention was associated with a decrease in UAI with casual partners (AOR=0.22, 95% CI 0.09 to 0.54).
CONCLUSIONS: Despite highly prevalent HIV risk behaviours, HIV seropositivity and prior HIV testing were low. Increasing sexual negotiation skills and access to HIV testing and other prevention services may improve future prevention efforts.
KEYWORDS: HIV; Homosexuality; Prevention; Sexual Behaviour

Matched MeSH terms: Unsafe Sex/statistics & numerical data*
The relative risk of HIV among IDUs not in treatment in Malaysia

Vicknasingam B, Narayanan S, Navaratnam V

AIDS Care, 2009 Aug;21(8):984-91.
PMID: 20024754 DOI: 10.1080/09540120802657530

Despite the growing HIV threat among injecting drug users (IDUs) in Malaysia, there is a dearth of information on their HIV risk behaviour. This study focused on identifying specific risk behaviours that distinguished HIV positive IDUs from those who were not. For the first time, data on IDUs not in treatment were obtained through a cross-sectional survey of 526 subjects recruited from five selected cities across peninsular Malaysia. A structured questionnaire and face-to-face interviews were utilised to collect detailed information on their drug use practices and sexual behaviours. On-site serological testing determined their HIV and hepatitis C status. The findings indicated that ethnic Malays, who are also Muslims, form the majority of IDUs not in treatment. Bivariate analysis identified six risk factors associated with HIV seropositivity: being 44 years or younger; not holding a regular job; initiating drug use at age 23 or younger; being a morphine user; sharing injecting equipment and having multiple-sex partners. However, only the last two remained significant in multivariate analysis. That sharing contaminated injecting equipment is a significant risk factor strongly justifies the widening of the pilot needle and syringe exchange programme initiated hesitantly in late 2005 as a reaction to the worsening HIV/AIDS situation. Condom use, though not independently significant, remains important because consistent and wider use could neutralise the second risk factor--having multiple-sex partners. The finding that injecting drug use is increasingly occurring in groups underscores the need for outreach programmes that emphasise safe injecting practices in group settings. In addition, counsellors should endeavour to convince drug users to enter treatment since being in treatment appears to reduce risk behaviours. Finally, conservative Muslim unease about harm reduction must be assuaged quickly since Malay Muslims form the majority of IDUs not in treatment.

Matched MeSH terms: Unsafe Sex/statistics & numerical data
Fulltext Chemsex among gay, bisexual, and other men who have sex with men in Singapore and the challenges ahead: A qualitative study

Tan RKJ, Wong CM, Chen MI, Chan YY, Bin Ibrahim MA, Lim OZ, et al.

Int J Drug Policy, 2018 11;61:31-37.
PMID: 30388567 DOI: 10.1016/j.drugpo.2018.10.002

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.

Matched MeSH terms: Unsafe Sex/statistics & numerical data
Fulltext Prevalence of human immunodeficiency virus and sexually transmitted infections among cisgender and transgender women sex workers in greater Kuala Lumpur, Malaysia: results from a respondent-driven sampling study

Wickersham JA, Gibson BA, Bazazi AR, Pillai V, Pedersen CJ, Meyer JP, et al.

Sex Transm Dis, 2017 11;44(11):663-670.
PMID: 28708696 DOI: 10.1097/OLQ.0000000000000662

BACKGROUND: Sex workers face a disproportionate burden of human immunodeficiency virus (HIV) and sexually transmitted infections (STI) worldwide. For cisgender women sex workers (CWSW), global HIV prevalence is over 10%, whereas transgender women sex workers (TWSW) face an HIV burden of 19% to 27%.

METHODS: We used respondent-driven sampling to recruit 492 sex workers, including CWSW (n = 299) and TWSW (n = 193) in Greater Kuala Lumpur, Malaysia. Participants completed an in-depth survey and were screened for HIV, syphilis, Chlamydia trachomatis, and Neisseria gonorrhoeae. Sample characteristics stratified by gender identity and interview site are presented. Bivariate analyses comparing CWSW and TWSW were conducted using independent samples t tests for continuous variables and χ tests for categorical variables.

RESULTS: Pooled HIV prevalence was high (11.7%; 95% confidence interval [CI], 8.8-14.5), and was similar for CWSW (11.1%) and TWSW (12.4%). Rates of syphilis 25.5% (95% CI, 21.6-29.5), C. trachomatis (14.8%; 95% CI, 11.6-18.0) and N. gonorrhoeae (5.8%; 95% CI, 3.7-7.9) were also concerning. Both groups reported lifetime HIV testing (62.4%), but CWSW were less likely to have ever been HIV tested (54.5%) than TWSW (74.6%). Median time since last HIV test was 24 months. Previous screening for STI was low. Inconsistent condom use and drug use during sex work were not uncommon.

CONCLUSIONS: High HIV and STI prevalence, coupled with infrequent HIV and STI screening, inconsistent condom use, and occupational drug use, underscore the need for expanded HIV and STI prevention, screening, and treatment efforts among CWSW and TWSW in Malaysia.

Matched MeSH terms: Unsafe Sex/statistics & numerical data
Fulltext Premarital sexual intercourse among adolescents in Malaysia: a cross-sectional Malaysian school survey

Lee LK, Chen PC, Lee KK, Kaur J

Singapore Med J, 2006 Jun;47(6):476-81.
PMID: 16752015

INTRODUCTION: Sexual intercourse among Malaysian adolescents is a major concern, especially with the worry of HIV/AIDS. This study was done to determine the prevalence of sexual intercourse among secondary school students aged 12 to 19 years in Negeri Sembilan, Malaysia.
METHODS: This is a cross-sectional school survey conducted on 4,500 adolescent students based on a structured questionnaire. Data were collected using the self-administered questionnaire (translated version of the Youth Risk Behaviour Surveillance in Bahasa Malaysia).
RESULTS: The study showed that 5.4 percent of the total sample were reported to have had sexual intercourse. The proportion among male students who had had sex was higher (8.3 percent) compared with female students (2.9 percent). The mean age at first sexual intercourse was 15 years. One percent of students reported that they had been pregnant or had made someone else pregnant. Adolescent sexual intercourse was significantly associated with (1) socio-demographical factors (age, gender); (2) environmental factors (staying with parents); and (3) substance use (alcohol use, cigarette smoking, drug use), even after adjustment for demographical factors. The survey showed that 20.8 percent of respondents had taken alcohol, 14.0 percent had smoked cigarettes, 2.5 percent had tried marijuana, 1.2 percent had tried ecstasy pills, 2.6 percent had tried glue sniffing, 0.7 percent had tried heroin, and 0.7 percent had intravenous drugs.
CONCLUSION: Prevalence of sexual intercourse among Malaysian adolescents was relatively low compared to developed countries. However, certain groups of adolescents tend to be at higher risk of engaging in sexual intercourse. This problem should be addressed early by targeting these groups of high-risk adolescents.

Matched MeSH terms: Unsafe Sex/statistics & numerical data*
Fulltext Factors associated with pregnancy among unmarried women in Malaysia

Zain NM, Low WY, Othman S

Southeast Asian J. Trop. Med. Public Health, 2015 May;46(3):526-38.
PMID: 26521527

Pregnancy among unmarried women may have negative social and health implications in Malaysia. The number of pregnancies among unmarried women has increased in Malaysia, but the socio-demographic profile of these women is unclear. This study aims to evaluate the characteristics of unmarried pregnant women and the factors associated with unmarried pregnancies among young women in Malaysia. We conducted a cross sectional study at six hospitals and six women's shelters in Peninsular Malaysia during 2011-2012. Unmarried pregnant women were compared with married pregnant women. Participants were interviewed using a structured questionnaire asking for socio-demographic data, family background, risky sexual behavior, social support and pregnancy details. A total of 484 women (239 unmarried and 245 married) were included in the study. Most unmarried subjects were adolescents, from urban areas, from a low socioeconomic group, and lived with parents prior to pregnancy. Age (OR=0.67; 95% CI: 0.61-0.74), studying status (OR=17.33; 95% CI: 2.65-113.19), alcohol use (OR=40.46; 95% CI: 2.51-652.38) exposure to pornographic material (OR=13.48; 95% CI: 3.24-56.01), contraceptive use (OR=0.20; 95% CI: 0.08-0.51), and social support (OR=0.90; 95% CI: 0.86-0.94) were all associated with unmarried pregnancy. These factors need to be considered when.designing an intervention program.

Matched MeSH terms: Unsafe Sex/statistics & numerical data