Reduction of emergency department use in people with disabilities

OBJECTIVES

To examine emergency department (ED) use by individuals with disabilities in safety-net clinics that have adopted the patient-centered medical home (PCMH) model.

STUDY DESIGN

This is a retrospective matched cohort study. Prior to matching, we identified 2269 nonelderly Medicaid beneficiaries with disabilities from a Los Angeles Medicaid managed care plan in PCMH clinics and 21,897 in non-PCMH clinics.

METHODS

To minimize self-selection bias from clinics and individuals, we created 3 comparison groups through a series of propensity score matching schemes that included matching clinics with similar health service utilization per patient and matching individuals with similar demographic characteristics and underlying health conditions. Rates of having at least 1 ED visit per year and excess ED use (defined as ≥2 ED visits per year) were compared across beneficiaries who received care from PCMH clinics and matched comparisons using logistic regression analyses.

RESULTS

After matching on clinic- and individual-level characteristics, the adjusted odds ratio (OR) of excess ED use was 25% to 33% lower (P <.05) in the PCMH group compared with the non-PCMH group. When limiting the study population to patients with at least 1 office visit, the OR of having at least 1 ED visit decreased by 21% (P <.05) for the PCMH group. Similarly, the OR of having excess ED use decreased by 38% (P <.05) for the PCMH group.

CONCLUSIONS

Our study highlights that the adoption of the PCMH model in safety-net clinics was associated with reduced ED use in Medicaid beneficiaries with disabilities.

Understanding interactions of formerly incarcerated HIV-positive men and transgender women with substance use treatment, medical, and criminal justice systems

BACKGROUND

Low levels of medical care engagement have been noted for HIV-positive people leaving systems of incarceration in the United States. Substance misuse frequently co-occurs with criminal justice involvement in individuals who are living with HIV.

METHODS

We analyzed data from in-depth interviews with 19 HIV-positive individuals who were currently or formerly incarcerated in order to elucidate challenges faced in accessing care and maintaining HIV treatment regimens when cycling out of (and often back into) custody. Our thematic analysis used an ecosocial framework to describe participants' shifts between substance use treatment, medical care, and criminal justice systems.

RESULTS

Dominant themes included the dramatic increase in HIV-treatment-related autonomy required following release from jail because of differences in care delivery between custody-based and community-based care systems; the important, but temporary stabilization provided by residential substance use treatment programmes; and the inconsistency of substance use treatment approaches with chronic care models of disease management.

CONCLUSION

Enhanced integration of criminal justice, medical care, and substance use treatment institutions in planning for reentry of HIV populations may ease the impact of the dramatic shifts in context that often dissuade linkage and retention. This integration should include coordination with custody release processes, periodic assessments for active substance misuse in HIV treatment settings, support for (re)establishing health-promoting social networks, and options for long-term, residential substance use treatment programmes.

Data-driven decision-making tools to improve public resource allocation for care and prevention of HIV/AIDS

Public health agencies face difficult decisions when allocating scarce resources to control the spread of HIV/AIDS. Decisions are often made with few local empirical data. We demonstrated the use of the robust decision making approach in Los Angeles County, an approach that is data driven and allows decision makers to compare the performance of various intervention strategies across thousands of simulated future scenarios. We found that the prevailing strategy of emphasizing behavioral risk reduction interventions was unlikely to achieve the policy goals of the national HIV/AIDS strategy. Of the alternative strategies we examined, those that invested most heavily in interventions to initiate antiretroviral treatment and support treatment adherence were the most likely to achieve policy objectives. By employing similar methods, other public health agencies can identify robust strategies and invest in interventions more likely to achieve HIV/AIDS policy goals.

Does the Centers for Disease Control and Prevention's Recommendation of Opt-Out HIV Screening Impact the Effect of Stigma on HIV Test Acceptance?

HIV/AIDS-related stigma is a key factor impeding patient utilization of HIV testing services. To destigmatize HIV testing, the Centers for Disease Control and Prevention recommended an 'opt-out' screening strategy aimed at all patients in all clinical settings, regardless of HIV risk. This study assessed whether opt-out screening as compared to opt-in screening was associated with increased uptake of HIV testing among patients with HIV/AIDS-related stigma concerns. This study included 374 patients attending two Los Angeles ambulatory care clinics. Stigma items were grouped into three constructs: Blame/isolation, abandonment, and contagion. Individuals endorsing the blame/isolation subscale (AOR = 0.52; 95 % CI 0.29-0.92; p\0.05) and abandonment subscale (AOR = 0.27; 95 % CI 0.13-0.59; p\0.01) were significantly less likely to accept an HIV test. Additionally, the opt-out model did not counter the negative effects of stigma on HIV test acceptance. These findings indicate that stigma remains a barrier to HIV testing, regardless of the opt-out screening approach.

Preference for physician vs. nurse-initiated opt-out screening on HIV test acceptance

Provider-initiated opt-out HIV screening suggests that providers should routinely order HIV tests unless a patient declines. However, data on how providers will respond to this new screening model are scarce. Documented concerns from the providers' perspectives have included time constraints of a typical patient encounter, and discomfort with discussing sexual history and risk behavior with patients. To address these potential barriers, nurse-initiated screening has been proposed as an approach to increasing screening rates in general medical and urgent care settings. This study compares patient acceptability of provider-initiated opt-out HIV screening with nurse-initiated opt-out HIV screening among 220 patients between the ages of 18-64 from two publically funded "safety-net" outpatient clinics in Los Angeles County. Our study found that 77% of patients agreed to HIV testing using opt-out screening, and that HIV test acceptance was higher with the physician-initiated opt-out model compared with the nurse-initiated opt-out model (adjusted odds ratios = 2.92; 95% CI = 1.37-6.22). These findings indicate that adding opt-out screening to primary care providers responsibilities may be an acceptable and effective strategy for addressing the perennially low HIV testing rates, particularly among low income, traditionally underserved patient populations among whom the epidemic is expanding most rapidly.

The role of mental health in mediating the relationship between social support and optimal ART adherence

Optimal adherence to antiretroviral therapy (ART) is essential for reducing mortality and morbidity in persons living with HIV/AIDS (PLWHA), as well as for reducing the risk of further HIV transmission. While studies have identified psychosocial factors such as lack of social support and poor mental health status as important barriers to optimal ART adherence, few studies have explored the potential of a mediation effect of psychosocial factors on the relationship between social support and optimal ART adherence. This paper assessed whether mental health status mediated the relationship between social support and optimal ART adherence among a cross-sectional sample of 202 persons living with HIV who were recruited from HIV clinical care sites and community-based organizations in Los Angeles County (LAC). Participants completed a survey that included social support items from the Medical Outcome Study: Social Support Survey (MOS-SSS) Instrument, mental health measures from the Medical Outcomes Study Short Form (SF-12), and ART adherence based on self-report. Among those currently taking ART, 61.7% reported having optimal adherence. Social support was significantly associated with a high score on the mental health status scale (AOR =2.90; 95% CI=1.14-5.78) and optimal ART adherence (AOR=1.81; 95% CI=1.81; 95% CI=1.18-2.79). When mental health status was introduced into the model, the association between social support and optimal ART adherence was no longer significant. Our findings suggest the HIV interventions targeting social support to improve ART adherence will likely be most successful if the support bolsters the mental health of the participants. Clearly, better understanding the relationships among social support, mental health, and ART adherence will be critical for development and implementation of future ART adherence interventions.

Operationalizing treatment as prevention in Los Angeles County: antiretroviral therapy use and factors associated with unsuppressed viral load in the Ryan White system of care

Despite extensive prevention efforts, an estimated 21% of individuals with HIV/AIDS in the United States are unaware of their status, placing them at greater risk for spreading the virus to others. HIV treatment as prevention (TasP) is rapidly becoming an important public health strategy to reduce HIV transmission at the population level. Data for this study were collected on a sample of 11,397 HIV-positive individuals in the Ryan White system, a publicly funded system of care for HIV-positive individuals in Los Angeles County who are uninsured, in 2009 to examine two components of TasP: baseline rates and factors associated with antiretroviral therapy (ART) use and viral load (VL) suppression in a publicly funded system of care. ART coverage among our sample was 90%. In multivariate analyses, those with a higher odds of having unsuppressed VL included: females compared to males (adjusted odds ratio [AOR]=1.25; 95% confidence interval [CI]=1.06, 1.47); African Americans compared to whites (AOR=1.42; 95% CI=1.24, 1.62); men who have sex with men compared to heterosexuals (AOR=1.15; 95% CI=1.00, 1.32); recent substance abusers compared to nonsubstance abusers (AOR=1.35; 95% CI=1.17, 1.55); those recently incarcerated or ever incarcerated compared to those never incarcerated (AOR=1.37; 95% CI=1.15, 1.63; and AOR=1.28; 95% CI=1.09, 1.50); and those retained in care compared to those not retained in care (AOR=1.98; 95% CI=1.76, 2.22). Understanding the key sociodemographic, geographic and behavioral factors associated with ART use as well as HIV VL suppression will be useful for informing the development and deployment of targeted programming and policies that may further enhance the implementation of the TasP approach in communities across the United States.

Perceptions of sexual risk compensation following posttrial HIV vaccine uptake among young South Africans

Concerns about the impact of risk compensation on advances in biomedical human immunodeficiency virus (HIV) prevention technologies have been documented. We conducted an exploratory qualitative study using focus group discussions with young South African men and women (aged 18 to 24 years) to explore perceptions of risk compensation with regard to a hypothetical posttrial HIV vaccine. During the discussions, participants expressed their disquiet about the potential for risk compensation and the manner in which this might manifest among young people. Discussions specifically focused on reductions in condom use, an increase in multiple partners, and increased frequency of sex. The discussions also revealed contradictory feelings about HIV vaccines: appreciation for their development tempered by concerns about loss of control and undermining morality. Women were particularly concerned with the possibility of increased partner concurrency and infidelity. We suggest that concerns in HIV vaccine target populations about the impact of possible risk compensation be incorporated into strategies for vaccine introduction once vaccines move from the hypothetical to reality.

Acceptability of pre-exposure prophylaxis as an HIV prevention strategy: barriers and facilitators to pre-exposure prophylaxis uptake among at-risk Peruvian populations

This study examined pre-exposure prophylaxis (PrEP) acceptability among female sex workers, male-to-female transgendered persons and men who have sex with men in Lima, Peru. Focus groups explored social issues associated with PrEP acceptability and conjoint analysis assessed preferences among eight hypothetical PrEP scenarios with varying attribute profiles and their relative impact on acceptability. Conjoint analysis revealed that PrEP acceptability ranged from 19.8 to 82.5 out of a possible score of 100 across the eight hypothetical PrEP scenarios. Out-of-pocket cost had the greatest impact on PrEP acceptability (25.2, P < 0.001), followed by efficacy (21.4, P < 0.001) and potential side-effects (14.7, P < 0.001). Focus group data supported these findings, and also revealed that potential sexual risk disinhibition, stigma and discrimination associated with PrEP use, and mistrust of health-care professionals were also concerns. These issues will require careful attention when planning for PrEP roll-out.

Identification of human trafficking victims in health care settings

BACKGROUND

An estimated 18,000 individuals are trafficked into the United States each year from all over the world, and are forced into hard labor or commercial sex work. Despite their invisibility, some victims are known to have received medical care while under traffickers' control. Our project aimed to characterize trafficking victims' encounters in US health care settings.

METHODS

The study consisted of semi-structured interviews with six Key Informants who work closely with trafficking victims (Phase I) and 12 female trafficking survivors (Phase II). All survivors were recruited through the Coalition to Abolish Slavery and Trafficking, an NGO in Los Angeles, and all were trafficked into Los Angeles. Interviews were conducted in English and six other languages, with the assistance of professional interpreters. Using a framework analysis approach that focused on victims' encounters in health care settings, we assessed interview transcript content and coded for themes. We used an exploratory pile-sorting technique to aggregate similar ideas and identify overarching domains.

RESULTS

The survivors came from 10 countries. Eight had experienced domestic servitude, three had survived sex trafficking, and one had experienced both. Half the survivors reported that they had visited a physician while in their traffickers' control, and another worked in a health care facility. All Key Informants described other victims who had received medical care. For domestic servants, medical visits were triggered by injury and respiratory or systemic illness, while sex trafficking victims were seen by health professionals for sexually transmitted infections and abortion. Trafficking victims were prevented from disclosing their status to health care providers by fear, shame, language barriers, and limited interaction with medical personnel, among other obstacles.

DISCUSSION

This exploration of survivors' experiences in health care settings supports anecdotal reports that US health care providers may unwittingly encounter human trafficking victims. Increasing awareness of human trafficking, and modifying practice to facilitate disclosure, could improve victim identification.

The impact of acculturation on utilization of HIV prevention services and access to care among an at-risk Hispanic population

INTRODUCTION

HIV/AIDS disproportionately affects Hispanics in the United States, a diverse and heterogeneous population. The purpose of this study was to evaluate the relationship of acculturation with HIV and hepatitis C testing, and access to care among Hispanics at risk for HIV.

METHODS

We recruited 600 Hispanics from STD clinics, community-based organizations, and needle exchange programs in Los Angeles County.

RESULTS

Low levels of acculturation were significantly associated with having fewer HIV tests (OR 1.98, 95% CI 1.24, 3.15), no hepatitis C tests (OR 2.61, 95% CI 1.77, 3.84), testing positive for HIV (OR 2.67, 95% CI 1.04, 6.83), and low levels of access to care (beta=0.06; p<.05).

CONCLUSIONS

Low levels of acculturation are an important barrier to the use of HIV-related health care services. Our findings may inform the development of effective interventions that address the cultural and behavioral differences among Hispanic subgroups.

The association of stigma with self-reported access to medical care and antiretroviral therapy adherence in persons living with HIV/AIDS

BACKGROUND

The stigma of HIV-infection may profoundly affect the lives of persons living with HIV/AIDS (PLHA). However few studies have examined the association of HIV stigma with multiple components of HIV treatment and care.

OBJECTIVES

To estimate the association between HIV stigma and: self-reported access to care, regular source of HIV care, and antiretroviral therapy adherence; and to test whether mental health mediates these associations.

DESIGN

Cross-sectional study.

PARTICIPANTS

202 PLHA living in Los Angeles County in 2007.

MEASUREMENTS

Participants completed an anonymous survey, assessing internalized HIV stigma (28-items, alpha = 0.93), self-reported access to medical care (six items, alpha = 0.75), regular source of HIV care, and antiretroviral therapy (ART) adherence.

RESULTS

One-third of participants reported high levels of stigma; 77% reported poor access to care; 42.5% reported suboptimal ART adherence; and 10.5% reported no regular source of HIV care. In unadjusted analysis, those reporting a high level of stigma were more likely to report poor access to care (OR = 4.97, 95% CI 2.54-9.72), regular source of HIV care (OR = 2.48, 95% CI 1.00-6.19), and ART adherence (OR = 2.45, 95% CI 1.23-4.91). In adjusted analyses, stigma was significantly associated with poor access to care (OR = 4.42, 95% CI 1.88-10.37), but not regular source of HIV care or ART adherence. Mental health mediated the relationship between stigma and ART adherence, but not poor access to care or regular source of HIV care.

CONCLUSIONS

The association of stigma with self-reported access to care and adherence suggests that efforts to improve these components of HIV care will require a better understanding of the possible effects of stigma and its mediators.

Future HIV vaccine acceptability among young adults in South Africa

Developing and disseminating a preventive HIV vaccine is a primary scientific and public health objective. However, little is known about HIV vaccine acceptability in the high-prevalence setting of South Africa- where young adults are likely to be targeted in early dissemination efforts. This study reports on six focus groups ( n = 42) conducted in 2007 with South Africans aged 18 to 24 years. A deductive framework approach is used to identify key motivators and barriers to future HIV vaccine uptake. Participants identify HIV testing, HIV stigma, mistrust of the health care system, and concerns about sexual disinhibition as barriers to vaccine uptake. For women, family members and friends are strong motivators for vaccine uptake, whereas men are more likely to see vaccines as an opportunity to stop using HIV prevention strategies such as condoms and partner reduction. Implications of these findings for developing HIV vaccine dissemination strategies and policy in South Africa are discussed.

Development and psychometric assessment of a multidimensional measure of internalized HIV stigma in a sample of HIV-positive adults

There is a need for a psychometrically sound measure of the stigma experienced by diverse persons living with HIV/AIDS (PLHA). The goal of this study was to develop and evaluate a multidimentional measure of internalized HIV stigma that captures stigma related to treatment and other aspects of the disease among sociodemographically diverse PLHA. We developed a 28-item measure of internalized HIV stigma composed of four scales based on previous qualitative work. Internal consistency reliability estimates in a sample of 202 PLHA was 0.93 for the overall measure, and exceeded 0.85 for three of the four stigma scales. Items discriminated well across scales, and correlations of the scales with shame, social support, and mental health supported construct validity. This measure should prove useful to investigators examining in the role of stigma in HIV treatment and health outcomes, and evaluating interventions designed to mitigate the impacts of stigma on PLHA.

Stigma in the HIV/AIDS epidemic: a review of the literature and recommendations for the way forward

Although stigma is considered a major barrier to effective responses to the HIV/AIDS epidemic, stigma reduction efforts are relegated to the bottom of AIDS programme priorities. The complexity of HIV/AIDS-related stigma is often cited as a primary reason for the limited response to this pervasive phenomenon. In this paper, we systematically review the scientific literature on HIV/AIDS-related stigma to document the current state of research, identify gaps in the available evidence and highlight promising strategies to address stigma. We focus on the following key challenges: defining, measuring and reducing HIV/AIDS-related stigma as well as assessing the impact of stigma on the effectiveness of HIV prevention and treatment programmes. Based on the literature, we conclude by offering a set of recommendations that may represent important next steps in a multifaceted response to stigma in the HIV/AIDS epidemic.

Experiences of social stigma and implications for healthcare among a diverse population of HIV positive adults

Stigma profoundly affects the lives of people with HIV/AIDS. Fear of being identified as having HIV or AIDS may discourage a person from getting tested, from accessing medical services and medications, and from disclosing their HIV status to family and friends. In the present study, we use focus groups to identify the most salient domains of stigma and the coping strategies that may be common to a group of diverse, low-income women and men living with HIV in Los Angeles, CA (n = 48). We also explore the impact of stigma on health and healthcare among HIV positive persons in our sample. Results indicate that the most salient domains of stigma include: blame and stereotypes of HIV, fear of contagion, disclosure of a stigmatized role, and renegotiating social contracts. We use the analysis to develop a framework where stigma is viewed as a social process composed of the struggle for both internal change (self-acceptance) and reintegration into the community. We discuss implications of HIV-related stigma for the mental and physical health of HIV-positive women and men and suggestions for possible interventions to address stigma in the healthcare setting.

The effect of perceived stigma from a health care provider on access to care among a low-income HIV-positive population

Perceived stigma in clinical settings may discourage HIV-infected individuals from accessing needed health care services. Having good access to care is imperative for maintaining the health, well being, and quality of life of persons living with HIV/AIDS (PLWHAs). The purpose of this prospective study, which took place from January 2004 through June 2006, was to evaluate the relationship between perceived stigma from a health care provider and access to care among 223 low income, HIV-infected individuals in Los Angeles County. Approximately one fourth of the sample reported perceived stigma from a health care provider at baseline, and about one fifth reported provider stigma at follow up. We also found that access to care among this population was low, as more than half of the respondents reported difficulty accessing care at baseline and follow up. Perceived stigma was found to be associated with low access to care both at baseline (odds ratio [OR] = 3.29; 95% confidence interval [CI] = 1.55, 7.01) and 6-month follow up (2.85; 95% CI = 1.06, 7.65), even after controlling for sociodemographic characteristics and most recent CD4 count. These findings are of particular importance because lack of access or delayed access to care may result in clinical presentation at more advanced stages of HIV disease. Interventions are needed to reduce perceived stigma in the health care setting. Educational programs and modeling of nonstigmatizing behavior can teach health care providers to provide unbiased care.

Factors associated with self-efficacy for condom use and sexual negotiation among South african youth

OBJECTIVES

To use logistic regression modeling to identify factors associated with high self-efficacy for sexual negotiation and condom use in a sample of South African youth.

METHODS

The Reproductive Health and HIV Research Unit (RHRU) National Youth Survey examined a nationally representative sample of 7409 sexually active South African youth aged 15 to 24 years. We used logistic regression modeling in this sample to identify factors associated with the main outcome of high self-efficacy.

RESULTS

Among female respondents (n = 3890), factors associated with high self-efficacy in the adjusted model were knowing how to avoid HIV (odds ratio [OR] = 2.30, 95% confidence interval [CI]: 1.05 to 5.00), having spoken with someone other than a parent or guardian about HIV/AIDS (OR = 1.46, 95% CI: 1.01 to 2.10), and having life goals (OR = 1.28, 95% CI: 1.10 to 1.48). Not using condoms during their first sexual encounter (OR = 0.61, 95% CI: 0.50 to 0.76), a history of unwanted sex (OR = 0.66, 95% CI: 0.51 to 0.86), and believing that condom use implies distrust in one's partner (OR = 0.57, 95% CI: 0.51 to 0.86) were factors associated with low self-efficacy among female respondents. Male respondents (n = 3519) with high self-efficacy were more likely to take HIV seriously (OR = 4.03, 95% CI: 1.55 to 10.52), to believe they are not at risk for HIV (OR = 1.38, 95% CI: 1.12 to 1.70), to report that getting condoms is easy (OR = 1.85, 95% CI: 1.23 to 2.77), and to have life goals (OR = 1.30, 95% CI: 1.10 to 1.54). Not using condoms during their first sexual experience (OR = 0.51, 95% CI: 0.39 to 0.67), a history of having unwanted sex (OR = 0.47, 95% CI: 0.34 to 0.64), believing condom use is a sign of not trusting one's partner (OR = 0.63, 95% CI: 0.46 to 0.87), and refusing to be friends with HIV-infected persons (OR = 0.52, 95% CI: 0.32 to 0.85) were factors associated with low self-efficacy among male respondents in the fully adjusted model.

CONCLUSIONS

We used the social cognitive model (SCM) to identify factors associated with self-efficacy for condom use and sexual negotiation. Many of these factors are modifiable and suggest potential ways to improve self-efficacy and reduce HIV sexual risk behavior in South African youth.

The Inability to Take Medications Openly at Home: Does It Help Explain Gender Disparities in HAART Use?

OBJECTIVES

Previous studies have shown that HIV-positive women underuse highly active antiretroviral therapy (HAART), but the reasons for this gender disparity are not completely understood. We examined whether one reason for this disparity is that women are less likely to use HAART when they have difficulty taking HIV medications openly at home.

METHODS

This was a prospective cohort study of a national probability sample of 2864 adults receiving HIV care.

RESULTS

Among the 1910 people who participated in the follow-up survey and reported taking HIV medications, 11.8% reported they could not take HIV medications openly at home. Those who reported they had difficulty taking medications openly at home were more likely to be women, to be black, to live in the northeast United States, to have an annual income <5,000 US dollars, and to have no health insurance. In bivariate analysis, women had twice the odds of reporting difficulty taking medications openly (odds ratio [OR] 2.07, 95% confidence interval [CI] 1.36-3.15) compared with gay/bisexual men, although this gender difference was no longer significant in the adjusted model. For women, having difficulty taking medications openly at home was associated with a substantial decrease in the probability of being on HAART in the adjusted model (0.59, 95% CI 0.47-0.70 vs. 0.78, 95% CI 0.74-0.83), whereas no significant differences were observed for heterosexual or gay/bisexual men.

CONCLUSIONS

These results suggest that having difficulty taking medications openly is a barrier to antiretroviral treatment among women, but not among men, and may contribute to gender disparities in HAART use.

Treatment of lysosomal storage disease in MPS VII mice using a recombinant adeno-associated virus

Mucopolysaccharidosis type VII (MPS VII) is a lysosomal storage disease caused by a genetic deficiency of beta-glucuronidase (GUS). We used a recombinant adeno-associated virus vector (AAV-GUS) to deliver GUS cDNA to MPS VII mice. The route of vector administration had a dramatic effect on the extent and distribution of GUS activity. Intramuscular injection of AAV-GUS resulted in high, localized production of GUS, while intravenous administration produced low GUS activity in several tissues. This latter treatment of MPS VII mice reduced glycosaminoglycan levels in the liver to normal and reduced storage granules dramatically. We show that a single administration of AAV-GUS can provide sustained expression of GUS in a variety of cell types and is sufficient to reverse the disease phenotype at least in the liver.