Mediators of behavior change resulting from a sexual risk reduction intervention for STI patients, Cape Town, South Africa

The Information-Motivation-Behavioral Skills Model and Unprotected Sex: Assessing the Model's Utility and Predictability Among Bar Patrons in Tshwane, South Africa

The Information-Motivation-Behavioral skills (IMB) model has been a useful tool for understanding sexual risk behavior. However, its utility in predicting sexual risk behaviors among bar patrons, for whom the bar setting poses a higher risk of alcohol-related sexual risk behavior, has been underexplored. We assessed (1) the extent to which the IMB predicted number of episodes of unprotected sex in the past six months and (2) whether incorporating sex under the influence of alcohol and alcohol use improved the predictability of the model among bar patrons. Hierarchical regression models were conducted on data from 406 men and women from bars in rural areas of North-West province, South Africa. Behavioral skills were the sole IMB variable to predict unprotected sex with main partners (β = - 0.40; p < .001), explaining 18% of the variance. Variance explained increased to 21% with addition of sex under the influence of alcohol (β = 0.13; p = .019) and further increased to 26% with the addition of alcohol use (β = 0.24; p < .001). Motivation (β = - 0.21; p = .006) and behavioral skills (β = - 0.21; p = .006) were the significant IMB predictors of unprotected sex with casual partners (explaining 15% of the variance). Variance explained increased to 22% with the addition of sex under the influence of alcohol (β = 0.26; p = .001), but alcohol consumption was not an independent predictor of episodes of unprotected sex with casual partners. Interventions for improving HIV prevention behaviors among bar patrons should focus on enhancing individuals' behavioral skills and motivation and reducing their alcohol consumption.

Gender and Context Matter: Behavioral and Structural Interventions for People Who Use Alcohol and Other Drugs in Africa

Heavy alcohol consumption and other drug use are prominent across Africa and increase the risk of exposure to violence, HIV acquisition, and other life-threatening injuries. This review synthesizes evidence on alcohol and other drug (AOD) interventions in Africa; evaluates the differences between interventions that do and do not specifically target populations that use AODs; and highlights the impact of comprehensive vs. brief interventions and those that address syndemic issues from a gender and contextualized lens. Literature searches were conducted to identify research outcomes of randomized interventions published between January 2010 and May 2022 that address AOD use in Africa. Thirty-five full-text articles were included in this review. Most of the identified research studies were concentrated in a few countries. Most studies were conducted in South Africa. Many of the studies comprised brief interventions. However, the most comprehensive interventions were the most effective for AOD outcomes. Several studies indicated the importance of addressing AOD use alongside gender-based violence, mental health needs, gender roles, and other social determinants that affect health outcomes. Intervening on AOD use and addressing social determinants from a gender and contextually relevant perspective is essential to ensuring the long-term health and well-being of people in Africa.

How Alcohol Influences Mechanisms of Sexual Risk Behavior Change: Contributions of Alcohol Challenge Research to the Development of HIV Prevention Interventions

This paper examines the contributions of laboratory-based alcohol challenge research (ACR) to the development of HIV prevention interventions. Following a brief overview of HIV prevention interventions and related health behavior change models, we discuss how alcohol may influence mechanisms of behavior change. The paper highlights the value of ACR for: (1) elucidating mechanisms of action through which alcohol affects sexual risk behavior, (2) testing how alcohol may influence mechanisms thought to underlie HIV prevention interventions, (3) clarifying moderators of the causal influences of alcohol, (4) identifying novel intervention targets, and (5) developing strategies to reduce sexual risk among those who consume alcohol. We conclude with a discussion of the importance of using experimental research to identify mechanisms of behavior change that are specific to populations at high risk for HIV and outline some key implications for developing HIV prevention interventions that integrate the role of alcohol.

Assessing Potential Outcomes Mediation in HIV Interventions

Knowledge of causal processes through mediation analysis can help improve the effectiveness and reduce costs of public health programs, like HIV prevention and treatment interventions. Advancements in mediation using the potential outcomes framework provide a method for estimating the causal effect of interventions on outcomes via a mediating variable. The purpose of this paper is to provide practical information about mediation and the potential outcomes framework that can enhance data analysis and causal inference for intervention studies. Causal mediation effects are defined and then estimated using data from an HIV intervention randomized trial among people who inject drugs (PWID) in Ukraine. Results from a potential outcomes mediation analysis show that the intervention had a total causal effect on incident HIV infection such that participants in the experimental group were 36% less likely to become infected during the 12-month study than those in the control arm, but that neither self-efficacy nor network communication mediated this effect. Because neither putative mediator was significant, measurement and confounding issues should be investigated to rule out these mediators. Other putative mediators, such as injection frequency, route of administration, or HIV knowledge can be considered. Future research is underway to examine additional, multiple mediators explaining efficacy of the current intervention and sensitivity to confounding effects.

Social Cognitive Theory as a Theoretical Framework to Predict Sexual Risk Behaviors among Older Adults

OBJECTIVES

Older adults vary in their safe and unsafe sexual behaviors. While researchers are beginning to understand more about the sexual and intimate expression of older adults, only recently are they beginning to understand how older adults make decisions about sexual risk. Bandura's social cognitive theory offers a frame for understanding how self-efficacy, environmental factors, and goal motivation are related to sexual risk behaviors for older adults, including the interplay between these variables.

METHODS

Using a diverse sample of older adults (n = 720) age 50+ years, social cognitive theory was modeled to determine the relationship between environment variables (age, gender, and sexual health conversations with practitioners), behavioral variables (self-efficacy), and cognitive variables (importance of sexual wellness goals) with the outcome variable of sexual risk behaviors.

RESULTS

Self-efficacy had an indirect effect on sexual risk via sexual wellness goal motivation. Healthcare provider conversations had both direct and indirect effects on older adults' sexual risk through sexual wellness goal motivation. Models were similarly predictive for older men and women.

CONCLUSIONS

Sexual risk behaviors among older adults are more influenced by environmental factors in their healthcare settings and their perception and prioritization of sexual wellness goals.

CLINICAL IMPLICATIONS

Providers play a key role in initiating and maintaining sexual health discussions with older patients, potentially mitigating sexual risk and bolstering self-efficacy.

Brief Enhanced Partner Notification and Risk Reduction Counseling to Prevent Sexually Transmitted Infections, Cape Town, South Africa

BACKGROUND

Evidence-based interventions are needed to stem sexually transmitted infections (STIs). Clinic-delivered counseling remains an important avenue for effective STI prevention.

METHODS

A 3-arm randomized clinical trial compared (a) STI health education control condition, (b) risk reduction counseling, and (c) enhanced partner notification counseling. Men and women (n = 1050) were recruited from an STI clinic in Cape Town, South Africa. After baseline assessments, participants were randomly allocated to receive 1 of the 3 single-session counseling interventions and were followed up for 9 months of behavioral assessments and 12 months of electronic medical records abstraction for STI clinic services.

RESULTS

Sexual risk reduction counseling reported greater condom use than did the other 2 conditions during the 3 and 6 months follow-ups. In addition, women receiving risk reduction counseling were significantly less likely to have returned for STI clinic services but did not differ in the number of STI clinic visits over the year.

CONCLUSIONS

Brief single-session STI prevention counseling demonstrates significant targeted outcomes. The findings suggest that counseling approaches to both increase condom use and enhance partner notification may offer more robust and sustained outcomes and should be tested in future research.

Reducing sexual health risks and substance use in the prenatal setting: A study protocol for a randomized controlled trial

Sexually transmitted infections (STIs) are at a record high in the United States, and STI risk is a critical and costly public health concern for childbearing women. STIs can lead to a number of serious health risks including premature birth, low birth weight, ectopic pregnancy, and fetal death. Similarly, there has been a dramatic increase in substance use during pregnancy, leading to complications during pregnancy and poorer birth outcomes. Women who misuse substances are disproportionately more likely to engage in risky sexual behaviors that can result in STIs. The proposed study will test whether the Health Check-Up for Expectant Moms (HCEM), a computer-delivered brief intervention that simultaneously targets STI risk and alcohol/illicit drug use during pregnancy, reduces antenatal and postpartum risk more than an attention, time, and information matched control condition among pregnant women seeking prenatal care. The study is a two-group, randomized controlled trial in which a diverse sample of 250 pregnant women will be recruited from prenatal care clinics and assigned to either (a) a computer-delivered, single-session brief intervention plus two booster sessions); or (b) a computer-delivered control condition. Follow-up assessments will occur at 2 and 6 months from baseline, and at 6 weeks postpartum. Our objective measures include STI incidence and birth outcomes. The results of this trial will fill a critical gap and provide much-needed data on the efficacy, costs, and resource utilization of a practical computer-delivered, brief motivational intervention tailored to reach high-risk women during pregnancy and extending impact to postpartum.

Antiretroviral Therapy Adherence Among People Living With HIV: Directed Content Analysis Based on Information-Motivation-Behavioral Skills Model

Antiretroviral therapy (ART) is one of the complexities of treatment and care for people living with HIV (PLHIV). It is essential to understand the challenges of admitting ART in PLHIV based on the Information Motivation Behavioral skills (IMB) model. This study was conducted using qualitative and directed content analysis on 15 participants. The participants included 10 patients and five health-care providers selected from the behavioral diseases counseling center affiliated with a medical university in southeast of Iran using purposive sampling method. Data were collected through semistructured interviews. Data analysis has led to three main categories—information, motivation, and behavioral skills—and eight subcategories. ART adherence in an Iranian context is like an iceberg that the IMB model can deeply identify underwater and unanticipated motivations and factors that lead to nonadherence. Therefore, it can be useful in designing and developing context-based nonadherence to ART interventions.

A randomised controlled trial of a telephone administered brief HIV risk reduction intervention amongst men who have sex with men prescribed post-exposure prophylaxis for HIV after sexual exposure in the UK: Project PEPSE

BACKGROUND

In western countries, men who have sex with men (MSM) are most affected by HIV and increasingly likely to engage in risky sexual behaviour. MSM who experience a potential sexual exposure to HIV (PEPSE) and receive a preventative regimen of anti-HIV treatment are at particularly high risk of acquiring HIV and could potentially benefit from targeted risk reduction behavioural interventions such as motivational interviewing (MI).

PURPOSE

The aim of this trial was to examine the impact of augmented MI (MI plus information provision and behavioural skills building), over and above routine care, on reducing risky sexual behaviour in MSM prescribed PEPSE. Secondary aims of the research were to examine whether the intervention reduced sexually transmitted infections (STI) and further requests for PEP.

METHODS

A parallel-group pragmatic randomised controlled trial was conducted with 175 MSM recruited from five sexual health (SH) clinics in the south east of England. The intervention was two fixed-duration sessions of telephone administered augmented MI. A manual guided the selection of individualised persuasive communication strategies based on underlying change mechanisms specified by the Information, Motivation and Behavioural Skills (IMB) model. Primary outcomes were the number of receptive and active anal intercourse (AI) partners, the use of condoms every time during receptive and active AI and the use of condoms sometimes during receptive and active AI.

RESULTS

There were no significant impacts on sexual risk behaviour or any of the psychological measures, and no discernible reduction in requests for repeat PEP or rates of STIs within a year.

CONCLUSION

Our behavioural intervention of augmented MI did not affect risky sexual behaviour, rates of further PEP and STIs, and psychological factors, in MSM prescribed PEPSE.

TRIAL REGISTRATION NUMBERS

UKCRN ID:11436; ISRCTN00746242.

Towards an Information Motivation and Behavioral Skills Model for New Sex Partners: Results of a Study of Condom Use as an HIV Prevention Method for Emerging Adults Who Met Partners on Dating and Sex-Seeking Platforms or Offline

The information, motivation, behavioral Skills (IMB) model was used to identify factors that affect condom use with new sex partners that were met offline or online. Mixed methods data were collected from adults between the ages of 18 and 29 years who reported a new sex partner. A model was composed of participants' IMB scale scores to determine the effect of these variables on condom use. A subset of 20 survey participants completed interviews exploring how IMB model elements may have influenced their condom use. Mixed methods results showed condom use skills were influential for condom use during the first sexual encounter between new partners. Qualitative findings suggest the information and motivation may also influence condom use with new sex partners. The IMB model for new partners may be relevant model for the development of interventions that encourage emerging adults to use condoms at first sex with new sex partners.

Behaviour change techniques in brief interventions to prevent HIV, STI and unintended pregnancies: A systematic review

BACKGROUND

Behaviour-change interventions have been consistently considered an essential part of comprehensive HIV, STI and unintended pregnancy prevention. In 2015, the World Health Organization reviewed and assessed existing evidence on brief behavioural interventions, leading to the publication of Brief sexuality-related communication: recommendations for a public health approach. This guideline recommends the use of brief behaviour intervention and communication programmes to promote sexual health and to prevent HIV, STIs, and unintended pregnancies in primary health services, particularly sexual and reproductive health services.

OBJECTIVE

With the purpose of informing the development of a brief behaviour intervention in sexual and reproductive health, we conducted a systematic review of brief intervention to prevent HIV, STI and unintended pregnancies, to identify behaviour change techniques (BCTs) used in health care settings.

METHODS

Participants from all ages and genders were included. Brief interventions delivered in ≤ 60 minutes were included. Data was extracted, and interventions were coded following the Behaviour Change Techniques Taxonomy (BCTTv1) guidelines.

RESULTS

Of the 6.687 articles identified, 355 were reviewed and 37 studies were included. In effective interventions, we identified 48 behaviour change techniques (BCTs). A core set of 8 frequently used behaviour change techniques was identified: "Problem solving", "Feedback on behaviour", "Social support (unspecified)", "Instructions on how to perform the behaviour", "Information about health consequences", "Information about social and environmental consequences", "Demonstration of the behaviour" and "Credible source".

CONCLUSIONS

The technical content of brief behaviour interventions was identified in a reliable and standardized way providing preliminary indications on potentially effective techniques to achieve behaviour change.

The role of perceived benefits and barriers in colorectal cancer screening in intervention trials among African Americans

The Health Belief Model (HBM) is widely used in health behavior interventions. The lack of diverse samples in the development of this theory warrants additional study on how it performs among minorities. While studies have utilized HBM to address colorectal cancer (CRC) screening, limited information exists confirming how these constructs influence screening. Data from three CRC screening trials were used to examine how perceived benefits/barriers perform among African Americans (AA) and whether they serve as mechanisms of the intervention effects on screening. The data were collected in AA churches (Study 1: N = 103; Study 2: N = 285; Study 3: N = 374) where lay members conducted CRC education to increase screening. Participants perceived benefits from colonoscopy (M = 2.4/3, SD = 0.87) and perceived few barriers (M = 0.63/8, SD = 1.1). Benefits were perceived for the fecal occult blood test (M = 11.4/15, SD = 2.1), and few barriers were reported (M = 11.7/30, SD = 3.4). Benefits more consistently predicted pre-intervention screening relative to barriers. For Study 3, individuals with fewer barriers reported a greater increase in colonoscopy screening at 12-months versus those with higher barriers (OR = 0.595, 95% CI = 0.368-0.964), P = 0.035). Benefits/barriers did not mediate the relationship. Potential measurement limitations, particularly for barriers, were uncovered and further research on how to assess factors preventing AA from screening is needed.

Psychopathology Subgroups and HIV Risk Among Women in Psychiatric Treatment

Among individuals with mental illness, the HIV infection rate is generally found to be substantially higher than in the general population. Understanding dimensions or subtypes of psychopathology linked with HIV risk behavior may enable development of targeted interventions to reduce HIV transmission. This study identified subgroups of women (n = 243) receiving outpatient psychiatric treatment based upon cluster analysis of indices of personality disorder and clinical symptom syndromes. High, medium, and low psychiatric severity cluster subgroups were found to differ significantly on key HIV risk variables. The high psychopathology subgroup revealed greater AIDS anxiety, more sexual partners, more sexual trading behaviors, less risk reduction self-efficacy, and less skill in condom usage than was found in one or both cluster subgroups characterized by less psychiatric severity. Results suggest that subgroups differentiated on the basis of levels of personality disorder and clinical symptom severity display differences in types and levels of HIV risk-related attitudes, beliefs, expectancies, skills, and behaviors that might guide development of tailored prevention intervention.

The Information-Motivation-Behavioral Skills Model Revisited: A Network-Perspective Structural Equation Model Within a Public Sexually Transmitted Infection Clinic Sample of Hazardous Alcohol Users

The information–motivation–behavioral skills (IMB) model is useful for understanding sexual risk behavior, but has not been tested with hazardously-drinking sexually transmitted infection (STI) clinic patients, a subpopulation at greater HIV risk, or with a network-perspective sexual risk behavior outcome. Participants (N = 569) were STI clinic patients who screened positive for hazardous drinking and risky sexual behavior. Sexual risk behavior (SRB) was operationalized as a latent variable with three indicators: (1) number of sexual partners, (2) number of unprotected sex occasions with primary partner, and (3) number of unprotected sex occasions with non-primary partner(s). Preliminary analyses suggested SRB was best operationalized as a latent variable with two indicators, while unprotected sex with primary partners should be considered separately. In structural models with good fit, the IMB model was generally supported. The IMB model functioned differently for non-primary and multiple partners compared to primary partners in STI clinic patients with hazardous alcohol use.

Preintervention Profiles of Information, Motivational, and Behavioral Self-Efficacy for Methamphetamine Use and HIV Medication Adherence Among Gay and Bisexual Men

Although rates of crystal methamphetamine use in the United States have fallen from their peak in the mid-2000s, use remains a major public health concern, which disproportionately affects gay and bisexual men (GBM). It poses a particular challenge for HIV-positive men, for whom it has been linked to medication adherence problems as well as compromised immune function. Although the information, motivation, and behavioral skills (IMB) model has been widely used to conceptualize health behavior, little is known about GBM's initial levels of information, motivation, and behavioral self-efficacy to improve HIV medication adherence and to reduce crystal methamphetamine use at the outset of treatment. The present study identified profiles of IMB factors related to HIV medication adherence and crystal methamphetamine use in a sample of 210 HIV-positive GBM who consented to participate in an intervention study. Results indicated three distinct patterns of IMB factors. The largest group was ready to change both adherence and methamphetamine use (n = 104). This group also had depression scores that were significantly lower than other groups. A second group appeared ready to change medication adherence, but was ambivalent about changing methamphetamine use (n = 60). This group reported significantly more symptoms of methamphetamine dependence than the other groups. A third group was characterized by global IMB barriers to change (n = 46). Results are discussed in the context of tailoring psychoeducation, motivational interviewing, and cognitive behavioral interventions to match these preintervention patterns of IMB factors.

Mediation Analysis of the Efficacy of the Eban HIV/STD Risk-Reduction Intervention for African American HIV Serodiscordant Couples

Targeting couples is a promising behavioral HIV risk-reduction strategy, but the mechanisms underlying the effects of such interventions are unknown. We report secondary analyses testing whether Social-Cognitive-Theory variables mediated the Eban HIV-risk-reduction intervention's effects on condom-use outcomes. In a multisite randomized controlled trial conducted in four US cities, 535 African American HIV-serodiscordant couples were randomized to the Eban HIV risk-reduction intervention or attention-matched control intervention. Outcomes were proportion condom-protected sex, consistent condom use, and frequency of unprotected sex measured pre-, immediately post-, and 6 and 12 months post-intervention. Potential mediators included Social-Cognitive-Theory variables: outcome expectancies and self-efficacy. Mediation analyses using the product-of-coefficients approach in a generalized-estimating-equations framework revealed that condom-use outcome expectancy, partner-reaction outcome expectancy, intention, self-efficacy, and safer-sex communication improved post-intervention and mediated intervention-induced improvements in condom-use outcomes. These findings underscore the importance of targeting outcome expectancies, self-efficacy, and safer-sex communication in couples-level HIV risk-reduction interventions.

Toward Development of Enhanced Preventive Interventions for HIV Sexual Risk among Alcohol-Using Populations: Confronting the 'Mere Pause from Thinking'

The papers in this issue detail state-of-the science knowledge regarding the role of alcohol use in HIV/AIDS risk, as well as offer suggestions for ways forward for behavioral HIV prevention for at-risk alcohol-using populations. In light of recent evidence suggesting that the anticipated uptake of the newer biomedical HIV prevention approaches, prominently including pre-exposure prophylaxis, has been stalled owing to a host of barriers, it has become ever more clear that behavioral prevention avenues must continue to receive due consideration as a viable HIV/AIDS prevention approach. The papers collected here make a valuable contribution to "combination prevention" efforts to curb HIV spread.

Reducing HIV Risks in the Places Where People Drink: Prevention Interventions in Alcohol Venues

Apart from individual alcohol drinking behavior, the context or places where people drink play a significant role in HIV transmission risk. In this paper, we review the research that has been conducted on alcohol venues to identify the social and structural factors (e.g., social norms, sexual behavior) that are associated with HIV risk in these places, to review HIV prevention interventions based in alcohol venues, and to discuss appropriate methodologies for alcohol venue research. Alcohol venues are defined here as places that sell or serve alcohol for onsite consumption, including bars, bottle stores, nightclubs, wine shops, and informal shebeens. Despite the many established HIV risk factors at play in alcohol venues, limited prevention strategies have been implemented in such places. A total of 11 HIV prevention interventions or programs were identified. HIV prevention interventions in alcohol venues may be conducted at the individual, social, or structural level. However, multilevel interventions that target more than one level appear to lead to the most sustainable behavior change. Strategies to incorporate alcohol venues in biomedical prevention strategies including antiretroviral therapy for alcohol users are also discussed.