Enhancing primary care HIV prevention: a comprehensive clinical intervention

Sexual risk behaviour reduction interventions in primary care in Organization of Economic Cooperation and Development countries. A systematic review

BACKGROUND

Sexually transmitted infections are a major public health issue, both in France and worldwide. Primary healthcare professionals play a key role in sexual health and prevention, but few take on this subject. Prevention strategies are diverse, thus risk reduction strategies focussing on behavioural changes are still needed.

PURPOSE

We conducted a systematic review to analyse risk reduction interventions focussing on behavioural change in OECD countries in primary healthcare settings to help develop a prevention tool easy to apply in primary care.

METHODS

We searched for English- or French-language controlled trials in PubMed, Cochrane Library, Scopus, PsycINFO, PsycArticle, PBSC, SocINDEX, Google Scholar, and CAIRN, supplemented with the bibliographies of previous systematic reviews. Thirty controlled, randomized, or nonrandomized trials were included in the systematic review. We did not conduct any meta-analysis due to the diversity of populations, outcomes and study designs.

RESULTS

There are efficient interventions in primary healthcare settings for reducing sexual risk behaviours and/or incident STI. Their efficiency seems to grow with the length and intensity of the intervention. Most interventions target only young, high-risk patients, and their long-term impact is uncertain. Most included studies had an overall risk of bias estimated as high or with some concerns.

CONCLUSIONS

Some tools could be used in primary care, with possible efficiency though results are difficult to generalize, and value should be assessed in daily practice. Future research should also focus on older population given the epidemiological evolutions, but also lower-risk population to target all patients seen in primary care settings.

HIV Related Stigma among Healthcare Providers: Opportunities for Education and Training

Background: HIV-stigma can influence engagement in care and viral suppression rates among persons living with HIV (PLWH). Understanding HIV-provider level stigma and its associated factors may aid in development of interventions to improve engagement in care. Methods: We assessed HIV-related stigma, provider knowledge, and practices and beliefs among healthcare providers using an online survey tool. Generalized linear modeling was used to determine factors associated with HIV-stigma score. Results: Among 436 participants, the mean age was 42.3 (SD 12.3), 70% female, 62% white, 65% physicians, and 44% worked at an academic center. The mean HIV Health Care Provider Stigma Scale (HPASS) score was 150.5 (SD 18.9, total = 180 [higher score = less stigma]) with factor subscale scores of 67.1 (SD 8.2, total = 78) prejudice, 51.3 (SD 9.7, total = 66) stereotyping, and 32.1 (SD 5, total = 36) discrimination. Female sex and comfort with talking about sex and drug use had 4.97 (95% CI 0.61, 9.32) and 1.99 (95% CI 0.88, 3.10) estimated higher HPASS scores. Disagreement/strong disagreement versus strong agreement with the statement that PLWH should be allowed to have babies and feeling responsible for talking about HIV prevention associated with -17.05 (95% CI -25.96, -8.15) and -2.16 (95% CI -3.43, -0.88) estimated lower HPASS scores. Conclusions: The modifiable factors we identified as associated with higher HIV related stigma may provide opportunities for education that may ameliorate these negative associations.

A randomized clinical trial evaluating the impact of counselor training and patient feedback on substance use disorder patients' sexual risk behavior

INTRODUCTION

High risk sex-such as sex with multiple partners, condomless sex, or transactional or commercial sex-is a risk factor in individuals with substance use disorders (SUDs). SUD treatment can reduce sexual risk behavior, but interventions to reduce such behavior in this context have not been consistently effective. This study sought to determine if the impact of treatment on sexual risk behavior can be increased.

METHODS

In a nested 2 × 2 factorial repeated measures design, we examined outcomes of two interventions: training for counselors in talking to patients about sexual risk; and availability to both counselors and patients of a personalized feedback report based on patient self-report of sexual behavior. Counselors received either a brief, information-based, Basic Training, or a multi-session, skills-based Enhanced Training. Their patients completed an audio-assisted computerized assessment of sexual behavior and received either No Feedback or a Personalized Feedback Report (PFR). Four hundred seventy six patients participated. Patient follow-up occurred 3- and 6-months postbaseline. Primary patient outcome measures were Number of Unsafe Sex Occasions (USO) and whether patients reported talking about sex in counseling sessions (Discussed Sex), both in the past 90 days. Secondary outcomes included Number of Sexual Partners, Sex Under the Influence of Substances, and Perceived Condom Barriers.

RESULTS

Patients of Enhanced-condition counselors compared to those of Basic-condition counselors were more likely to report talking about sex with their counselor at 6-month follow-up. Personalized feedback also increased the likelihood of reporting counselor discussions at 6-month follow-up. Neither the training nor the feedback condition affected USO, Number of Partners, or Sex Under the Influence.

DISCUSSION

We discuss why these two interventions apparently altered counselor-patient communication about sexual risk behavior without affecting the behavior itself.

Barriers and Facilitators for Antiretroviral Treatment Adherence Among HIV-Positive African American and Latino Men Who Have Sex With Men

Some Black/African American and Hispanic/Latino men who have sex with men (MSM) living with HIV do not take antiretroviral therapy (ART). We conducted semistructured interviews with 84 adult, Black/African American and Hispanic/Latino MSM with HIV to understand ART barriers and facilitators. We used chi-square statistics to identify factors associated with ART use (p ≤ .05), and selected illustrative quotes. Over half (51.2%) said they followed their doctor's instructions; however, only 27.4% reported consistently taking ART. Some men delayed ART until overcoming diagnosis denial or becoming very sick. ART use was facilitated by encouragement from others, treatment plans, side effect management, lab test improvements, pill-taking reminders, and convenient care facilities that provide "one-stop shop" services. Men were more likely to take ART when having providers who communicated effectively and were perceived to treat them with respect. Healthcare personnel can use our findings to strengthen services for MSM of color.

Increasing substance use disorder counselors' self-efficacy and skills in talking to patients about sex and HIV risk: A randomized training trial

BACKGROUND

People with substance use disorder (SUD) experience increased risk for HIV, Hepatitis C, and sexually transmitted illnesses via risky sex. This high-risk population would benefit from sexual risk reduction interventions integrated into SUD treatment. However, many SUD counselors report lack of skill or confidence in addressing sexual risk with patients.

METHODS

This study was part of a larger nested 2 × 2 factorial repeated measures design, which compared two levels of counselor training (Basic-2 h versus Enhanced-10 h plus ongoing coaching). We determined whether counselors receiving Enhanced training addressing their motivation, confidence and skills (a) increased knowledge about sexual issues; (b) increased self-efficacy to discuss sex with patients; and (c) improved skills in discussing sex as part of SUD treatment, compared with those receiving shorter information-based training. Counselors providing individual therapy at two opioid treatment programs (OTP) and two psychosocial outpatient programs in the United States were eligible. Randomization occurred after Basic training. Measures included self-report (self-efficacy and knowledge) and blinded coding of standardized patient interviews (skill).

RESULTS

Counselors receiving Enhanced training (n = 28) showed significant improvements compared to their Basic training counterparts (n = 32) in self-efficacy, use of reflections, and use of decision-making and communication strategies with standardized patients. These improvements were maintained from post-training to 3-month follow-up. No adverse effects of study participation were reported.

CONCLUSIONS

Results suggest that counselors can improve their knowledge, self-efficacy and skill related to sexual risk conversations with patients based on modest skills-based training.

Sexually Transmitted Diseases and Managed Care: An Inquiry and Review of Issues Affecting Service Delivery

To understand the potential role of managed care organizations (MCOs) in prevention and control of sexually transmitted diseases (STDs), we conducted a systematic review of articles on STDs and managed care and sought qualitative information from MCOs on STD-related activities. The review focused on prevention, risk assessment, patient education, counseling, screening, and costs of care, but revealed relatively few published articles. Barriers to STD service delivery included competing priorities, lack of time or supporting organizational structures, and differing mandates of health departments and MCOs. Facilitators included collaboration between health departments and MCOs, regulatory and performance incentives, buy-in from key stakeholders, availability of infrastructure to support data collection, and inclusion of chlamydia screening in the Health Employer Data and Information Set to monitor plan performance. Because of the shift of STD service delivery from the public to private sector, incentives need to maximize interest and cooperation of patients, clinicians, and MCOs in STD prevention.

Changes in Clinician Ability to Assess Risk and Help Patients Determine the Need for Hiv Testing

An estimated one of four people with HIV in the United States do not know they have the infection. The Centers for Disease Control and Prevention encourages HIV testing in clinical settings, but there is evidence that this is not done on a regular basis. The purposes of this study were to (a) compare two less traditional teaching methods with a classroom method to determine whether the less traditional methods resulted in greater improvement of clinician knowledge, skill, and willingness to perform HIV risk assessment as the basis for recommending HIV testing; and (b) find out whether there were significant differences in convenience, cost, learner preference, or learner acceptance that would make one method more desirable than the others. Findings from participants in the standardized patient interaction with facilitator feedback (FB) and the case-based self-study module (SSM) were not different from those of participants in the interactive classroom education method (CL). Generally, there were positive changes in knowledge, attitudes, and behaviors over time. Participants preferred standardized patient interaction (FB) and interactive classes (CL) to self-study modules (SSM).

Understanding structural barriers to accessing HIV testing and prevention services among black men who have sex with men (BMSM) in the United States

Structural-level factors have contributed to the substantial disproportionate rates of HIV among Black men who have sex with men (BMSM) in the United States. Despite insufficient HIV testing patterns, however, there is a void in research investigating the relationship between structural factors and access to HIV testing and prevention services among BMSM. Building on previous scholarly work and incorporating a dynamic social systems conceptual framework, we conducted a comprehensive review of the literature on structural barriers to HIV testing and prevention services among BMSM across four domains: healthcare, stigma and discrimination, incarceration, and poverty. We found that BMSM experience inadequate access to culturally competent services, stigma and discrimination that impede access to services, a deficiency of services in correctional institutions, and limited services in areas where BMSM live. Structural interventions that eliminate barriers to HIV testing and prevention services and provide BMSM with core skills to navigate complex systems are needed.

Missed opportunities for HIV testing in health care settings among young African American men who have sex with men: implications for the HIV epidemic

Limited health care access and missed opportunities for HIV and other sexually transmitted infection (STI) education and testing in health care settings may contribute to risk of HIV infection. In 2008, we conducted a case-control study of African American men who have sex with men (MSM) in a southeastern city (Jackson, Mississippi) with an increase in numbers of newly reported HIV cases. Our aims were to evaluate associations between health care and HIV infection and to identify missed opportunities for HIV/STI testing. We queried 40 potential HIV-infected cases and 936 potential HIV-uninfected controls for participation in this study. Study enrollees included HIV-infected cases (n=30) and HIV-uninfected controls (n=95) who consented to participate and responded to a self-administered computerized survey about sexual risk behaviors and health care utilization. We used bivariate analysis and logistic regression to test for associations between potential risk factors and HIV infection. Cases were more likely than controls to lack health insurance (odds ratio [OR]=2.5; 95% confidence interval [CI]=1.1-5.7), lack a primary care provider (OR=6.3; CI=2.3-16.8), and to not have received advice about HIV or STI testing or prevention (OR=5.4; CI=1.3-21.5) or disclose their sexual identity (OR=7.0; CI=1.6-29.2) to a health care provider. In multivariate analysis, lacking a primary health care provider (adjusted odds ratio [AOR]=4.5; CI=1.4-14.7) and not disclosing sexual identity to a health care provider (AOR=8.6; CI=1.8-40.0) were independent risk factors for HIV infection among African American MSM. HIV prevention interventions for African American MSM should address access to primary health care providers for HIV/STI prevention and testing services and the need for increased discussions about sexual health, sexual identity, and sexual behaviors between providers and patients in an effort to reduce HIV incidence and HIV-related health disparities.

Observed use of standard precautions in Chilean community clinics

OBJECTIVES

In Chile, little information about the use of standard precautions (SP) among health care workers (HCWs) exists. As part of a larger study to tailor and test an HIV prevention intervention for community HCWs, this study describes the observed frequency with which appropriate SP were used by HCWs in low-income community clinics of Santiago. Also, the availability of supplies is described.

SAMPLE

A total of 52 structured observations with potential contamination with body fluids were done.

RESULTS

HCWs used SP inconsistently, especially neglecting hand washing, surface cleaning, and cleaning of shared materials. Lack of materials contributed in some instances of failure to use SPs, especially wiping surfaces and safe disposal of sharp instruments, as shown by a positive correlation between use of SP and availability of materials. Essential materials were usually available. Although more education should relate to a better understanding of the importance of SP, no difference was found between professionals and paraprofessionals in the use of SP.

CONCLUSIONS

It is clear that the initial training, continuing education, and ongoing support for practicing SP are not adequate. Training should be offered to HCWs involved in caring for clients at community clinics to stop the spread of HIV or other infectious diseases in health care settings.

HIV medical care provider practices for reducing high-risk sexual behavior: results of a qualitative study

A first step in ensuring that HIV-infected persons practice the safer sexual behaviors that reduce disease transmission is to make certain that they receive accurate information about the relationship between sexual risk behaviors and HIV transmission. Health care providers can play a pivotal role in preventing secondary transmission of HIV; federal agencies and professional guidelines encourage providers to counsel HIV-infected patients about safer sex practices and transmission risks, particularly since the health care encounter may be the only time that HIV-infected persons receive information about prevention and risk reduction interventions. Yet research indicates that these opportunities are often missed. Prior to implementing a prevention demonstration project in an urban HIV and STD clinic, we conducted a qualitative investigation with providers, including physicians, nurse practitioners, physician assistants, and nurses. The purpose of this investigation was to examine the current status of prevention education and counseling efforts at the clinic, examine the barriers and facilitators to providing prevention counseling, and identify key areas where providers believed that they needed additional training.

STD/HIV prevention practices among primary care clinicians: risk assessment, prevention counseling, and testing

OBJECTIVE

To describe current practices of primary care (PC) clinicians for STD/HIV control services: risk assessment, prevention counseling, and offering tests.

STUDY DESIGN

We identified clinical strategies through qualitative interviews. We then surveyed by mail a random sample of Washington State family physicians, general internists, obstetrician-gynecologists, nurse practitioners, and certified nurse midwives. We identified characteristics of clinicians and their practices associated with each strategy and universal provision of each service.

RESULTS

We report on 519 clinicians (80% adjusted response rate). Clinicians provided services to selected patients they considered high risk. Universal practices were less common: risk assessment (56%), prevention counseling (60%), STD tests (30%), and HIV tests (19%). Universal services were more common among nurses, those recently trained, and those seeing more STD patients.

CONCLUSION

Different types of PC clinicians use widely differing clinical strategies and many use selective rather than universal approaches to STD/HIV control services. Further research is needed to develop tailored interventions to improve provision of these services.

Designing and delivering a prevention project within an HIV treatment setting: lessons learned from a specialist model

This paper presents lessons learned from an intervention designed to provide HIV prevention counseling within a hospital-based, multidisciplinary HIV clinic. The model, Positive Prevention, used Master's-level social workers (MSWs) as intervention specialists to minimize burden on primary care providers and to offer a replicable way to provide prevention in a similar setting. The intervention goal was to reduce risk behaviors through Motivational Interviewing, a patient-centered counseling approach with proven success impacting behavioral change. Implementation experiences offer insight into the challenges of using MSWs as prevention specialists. Particular challenges were related to patient engagement and retention. Experiences early in the implementation process were informative and allowed for adaptations to facilitate a more viable program; however even after executing new strategies, many of the program issues remained. Thus, the Positive Prevention model is not recommended as a best HIV prevention model for replication in similar high-volume, hospital-based, multidisciplinary HIV clinic settings.

Providers' HIV prevention discussions with HIV-seropositive injection drug users

Public health agencies have recommended incorporating HIV prevention counseling into the medical care of persons living with HIV/AIDS. Injection drug users (IDUs) especially need HIV risk-reduction counseling because of their high risk for HIV transmission through both sexual and injection behaviors. The objective of this study was to assess the prevalence of, and patient factors associated with, the delivery of HIV prevention messages to HIV-seropositive IDUs in primary care settings. A majority of participants reported having an HIV prevention discussion with their provider during their most recent primary care visit. Factors significantly associated with report of such discussion were being Hispanic or non-Hispanic Black; high school education or less; and better perception of engagement with provider. Medical providers should provide prevention messages to all HIV-seropositive IDUs, regardless of demographic factors. Effective HIV prevention interventions in primary care settings, including interventions to improve patient-provider communication, are needed for HIV-seropositive IDUs.

Self-identification as "down low" among men who have sex with men (MSM) from 12 US cities

Men who have sex with men (MSM) who are on the "down low" (DL) have been the subject of considerable media attention, but few data on this population exist. This exploratory study (N=455) compared MSM who considered themselves to be on the DL with MSM who did not (non-DL MSM). 20% self-identified as DL. Blacks and Hispanics were more likely than Whites to self identify as DL. MSM who did not identify as gay were more likely than gay-identified MSM to describe themselves as DL. DL-identified MSM were less likely to have had seven or more male partners in the prior 30 days, but were more likely to have had a female sex partner and to have had unprotected vaginal sex. DL-identified MSM were less likely to have ever been tested for HIV than were non-DL MSM. Prevention agencies should expand existing programs for MSM to include specific efforts to reach DL MSM.

Review of Clinical Trials Testing the Effectiveness of Clinician Intervention Approaches to Prevent Sexually Transmitted Diseases in Adolescent Outpatients

OBJECTIVE

Identify approaches for improving clinician provision of sexually transmitted diseases (STDs) prevention services among outpatient adolescents.

METHODS

Reviewed all peer-reviewed, published clinical trials identified through computerized searches (MEDLINE, PsychINFO) evaluating STD prevention services to outpatient adolescents by clinicians.

RESULTS

Five trials were identified examining changes in clinician provision of STD prevention services. Two of these trials resulted in adolescent self-reported risk reduction but neither of these trials effectively demonstrated reductions in objectively measured STD incidence. Nine clinical trials were identified that compared clinician with non-clinician provision of STD prevention services. Four of these trials resulted in adolescent self-reported risk reduction, and one of these trials demonstrated a reduction in objectively measured STD incidence.

CONCLUSIONS

Trials indicate that improvement in outpatient adolescent STD incidence is possible with non-clinicians as interventionists, and perhaps clinicians as interventionists if clinicians are supported by other educational resources. Opportunities for personalized, interactive adolescent education appears key to intervention success. The clinician role that is tested in most trials is confined to a single brief encounter with little attention to: development of clinician skills, quality of psychosexual risk assessment and tailoring to meet individual adolescent need, systems-level resources and supports, the parental role, or the impact of incorporating prevention into an ongoing adolescent-clinician relationship.

Predictors of Condom-Related Attitudes among At-Risk Women

BACKGROUND

Negative attitudes toward using male condoms tend to be associated with higher rates of sexual risk. Little has been written about the factors that influence women's attitudes toward condom use, and this has implications for HIV intervention efforts.

METHODS

Two hundred fifty adult women considered to be at risk based on demographic and family characteristics and residing in the Atlanta, Georgia, metropolitan area were interviewed between August 1997 and August 2000. Street outreach efforts were used to identify potential study participants, with further expansion of the sample done via targeted sampling and ethnographic mapping procedures.

RESULTS

Women held ambivalent to weakly positive attitudes toward condoms. Multivariate analysis revealed that five factors were associated with a greater frequency of engaging in seven specific types of sexual activities known to be associated with HIV transmission: condom-related attitudes (negative condom attitudes), marital status (being married vs. other marital status classification), religiosity (lesser), childhood physical abuse (greater), and the amount of illegal drug use (greater). Four significant predictors of condom attitudes were also identified: age (better condom attitudes among younger women), childhood neglect (more conductive condom attitudes among nonneglected women), self-esteem (more self-esteem = more favorable condom attitudes), and the number of drug problems experienced (more drug problems = more negative condom attitudes).

CONCLUSIONS

The more negative at-risk women's attitudes were regarding condom use, the more often they tended to engage in risky sex. Specific backgrounds and characteristics of the women were associated with greater/lesser condom use. To increase condom use, programs should consider targeting specific types of women as well as their specific attitudes toward condom use.

Recommendations for incorporating human immunodeficiency virus (HIV) prevention into the medical care of persons living with HIV

The estimated number of annual new human immunodeficiency virus (HIV) infections in the United States has remained at 40,000 for >10 years. Reducing the rate of transmission will require new strategies, including emphasis on prevention of transmission by HIV-infected persons. Medical care providers can affect HIV transmission by screening HIV-infected patients for risk behaviors, communicating prevention messages, discussing sexual and drug-use behaviors, reinforcing changes to safer behavior, referring patients for services such as substance abuse treatment, facilitating partner counseling and referral, and identifying and treating other sexually transmitted diseases. The Centers for Disease Control and Prevention (CDC), the Health Resources and Services Administration (HRSA), the National Institutes of Health (NIH), and the HIV Medicine Association (HIVMA) of the Infectious Diseases Society of America (IDSA) have recently collaborated to develop evidence-based recommendations for incorporating HIV prevention into the medical care of persons living with HIV. This article summarizes key aspects of the recommendations.

Viral hepatitis among young men who have sex with men: prevalence of infection, risk behaviors, and vaccination

BACKGROUND

Men who have sex with men (MSM) are at risk for acquiring hepatitis A virus (HAV), hepatitis B virus (HBV), and hepatitis C virus (HCV).

GOAL

The goal was to describe the seroprevalence of and risk factors for viral hepatitis, the frequency of vaccination against HAV and HBV, and reasons for lack of vaccination among young MSM.

STUDY DESIGN

We performed hepatitis serologies on 833 MSM aged 15 to 29 years who attended public venues in King County, Washington.

RESULTS

While 14.6% were HAV-immune due to vaccination, 13.9% had prior HAV infection; 57.9% were susceptible and 13.5% had unclear status. While 24.5% were HBV-immune due to vaccination, 13.3% had prior HBV infection; 44.2% were susceptible and 18.0% had unclear status. Prior HBV infection was associated with prior HAV infection. Men unvaccinated against HAV or HBV were unaware of the vaccines or had never been offered vaccination or perceived themselves at low risk for infection. Among 10 HCV-seropositive men, 70.0% reported injection drug use.

CONCLUSION

MSM must be vaccinated at an early age to prevent acquisition of HAV and HBV. Given the frequency of coinfection with HAV and HBV, a combined vaccine would be useful in this population.

Family planning providers' perspectives on dual protection

CONTEXT

Family planning providers can play an important role in helping women to identify their risk of HIV and other sexually transmitted diseases (STDs) and to adopt preventive measures. In-depth investigation of providers' attitudes about approaches to STD risk assessment, contraceptive counseling and dual protection--concurrent protection from STDs and unintended pregnancy--has been limited.

METHODS

In semistructured interviews conducted in 1998, 22 health care providers from a large New York City agency offering contraceptive and STD services described how they balanced STD and pregnancy concerns, viewed risk assessment and assessed various contraceptive methods.

RESULTS

STD prevention was seen as an integral part of family planning counseling, and most providers believed that risk assessment should be conducted universally. Providers viewed dual protection as use of condoms along with an effective contraceptive; few advocated use of the male or female condom alone. The female condom was believed to be a disease prevention method of last resort and was considered appropriate only for specific groups of women. Although providers lacked understanding about the effectiveness of the female condom and how to counsel clients concerning its use, they expressed interest in learning more.

CONCLUSIONS

Training is needed to reduce providers' negative perceptions of the female condom and to reinforce the importance of individualized counseling tailored to women's specific circumstances. Studies are needed on how to encourage family planning providers to promote male and female condoms as effective contraceptive methods.

HIV prevention in primary care: impact of a clinical intervention

Discomfort, lack of confidence in skills, and environmental constraints may cause primary care providers to miss opportunities to discuss human immunodeficiency virus (HIV) risk with patients. We used a systems approach to address both intrapersonal and environmental barriers to HIV risk assessment and prevention counseling in a managed care clinical setting. The design was one-group pretest/posttest. The study took place in two primary care clinics of a large Pacific Northwest managed care organization. Participants (n = 49) included physicians, physician assistants, nurse practitioners, registered nurses, and social workers. The intervention included training, clarification of provider/staff roles, assess to tools and materials, and reminders/reinforcers. Outcome measures were provider attitudes, beliefs, outcome expectations, knowledge, confidence in skills, and perceived supports and barriers, measured by written pretest/posttest surveys administered 12 months apart. Seven months after the most intensive part of the intervention, providers' attitudes and beliefs were more favorable to HIV risk assessment and prevention counseling. They were less likely to express frustration with high-risk patients (decrease from 100% to 79% agreement, p = 0.001) and more confident that their advice would be effective with gay men and single adult heterosexuals (p = 0.002 and 0.005, respectively). They reported more confidence in their training in sexual history taking (p = 0.0003) and their skills assessing readiness for change (p = 0.007), and more support in practice environments. This study demonstrated that it is possible to affect important personal and environmental factors that influence primary care providers' HIV prevention behavior using an interactive, real-world systems approach. Further research is needed on providers' impact on patient behavior.