Torsten B Neilands

University of California, San Francisco, San Francisco, California, United States

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Publications (133)398.26 Total impact

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    ABSTRACT: The effects of neighborhood context on sexual risk behavior are understudied, particularly for Black heterosexual men who do not inject drugs or report heavy drug use. Evidence of a generalized HIV epidemic (>1 %) among Black heterosexuals in low-income urban U.S. communities underscores the importance of examining the effects of neighborhood context on Black heterosexual men's sexual risk, however. We used structural equation modeling to test the pathways between neighborhood context (neighborhood disorder, personal violence, neighborhood threats), depression, substance use, and sexual risk behavior. Participants were 526 self-identified Black heterosexual men, ages 18-45, recruited via randomized venue-based probability sampling in Philadelphia, PA. Analyses of model fit statistics from Mplus indicated statistically significant direct pathways between neighborhood context, depression, substance use, and sexual risk behavior. The total indirect effect of neighborhood context on sexual risk behavior through substance use was also significant. The study's results highlight a need for more research on neighborhood context and sexual HIV risk, and for multilevel interventions to address the effects of negative neighborhood context on Black heterosexual men's sexual HIV risk.
    AIDS and Behavior 06/2014; · 3.49 Impact Factor
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    ABSTRACT: Harm reduction approaches endeavor to assist individuals with avoiding the most detrimental consequences of risk taking behaviors, but limited research has documented the outcomes of harm reduction substance abuse treatment. In total, 211 methamphetamine-using men who have sex with men (MSM) enrolled in two outcome studies of substance abuse treatment programs that were implementing an evidence-based, cognitive-behavioral intervention (i.e., the Matrix Model) from a harm reduction perspective. Study 1 (N = 123) examined changes in self-reported substance use, Addiction Severity Index (ASI) composite scores, and HIV care indicators over a 12-month follow-up. Study 2 (N = 88) assessed changes in substance use, sexual risk taking, and HIV care indicators over a 6-month follow-up. Participants in study 1 reported reductions in cocaine/crack use as well as decreases in the ASI drug and employment composite scores. Among HIV-positive participants in study 1 (n = 75), 47 % initiated or consistently utilized anti-retroviral therapy and this was paralleled by significant increases in self-reported undetectable HIV viral load. Study 2 participants reported reductions in methamphetamine use, erectile dysfunction medication use in combination with other substances, and sexual risk-taking behavior while using methamphetamine. Participants in both studies reported concurrent increases in marijuana use. Taken together, these studies are among the first to observe that clients may reduce stimulant use and concomitant sexual risk-taking behavior during harm reduction substance abuse treatment. Randomized controlled trials are needed to examine the differential effectiveness of harm reduction and abstinence-based approaches to substance abuse treatment.
    Journal of Urban Health 04/2014; · 1.89 Impact Factor
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    ABSTRACT: To describe the characteristics associated with patterns of daily and dual tobacco use in U.S. Air Force (USAF) personnel transitioning from Basic Military Training to Technical Training. Cross-sectional survey of USAF personnel in Technical Training School at Lackland Air Force Base (N = 8,956, response rate: 73%). Logistic regression analyzed the association of predictor variables between daily smokers, daily smokeless tobacco (ST) users, daily smokers who used ST nondaily, daily ST users who smoked cigarettes nondaily, and daily users of both cigarettes and ST. Compared to daily smokers, participants who were daily smokers/nondaily ST users were more likely to be male, would use ST and multiple forms of tobacco in the future, reported more friends using ST and cigarettes, and were more susceptible to tobacco advertising. Compared to daily ST users, daily ST users/nondaily cigarette users were more likely to live in the Midwest, would use multiple forms of tobacco in the future, reported more friends smoked cigarettes and used ST, and were more likely to try a product that claimed to be safer than cigarettes. Daily users of both cigarettes and ST were significantly more likely to be nicotine dependent than daily smokers/nondaily ST users and daily ST users/nondaily smokers. Dual users are heterogeneous groups of tobacco users who are at high risk for continued tobacco use. Daily users of both cigarettes and ST have higher levels of nicotine dependence, even compared to other dual users. Specific interventions targeted at dual users are needed in this increasingly prevalent and high-risk population.
    Nicotine & Tobacco Research 04/2014; · 2.48 Impact Factor
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    ABSTRACT: Couples' adopting a relational orientation - when partners regard themselves as a collective unit - is associated with optimal health. HIV-positive men and their HIV-negative partners (N = 116 serodiscordant male couples) were surveyed. Logistic regression showed greater relational orientations of HIV-positive (aOR=7.87; 95% CI = 1.63, 38.05) and HIV-negative partners (aOR=6.16; 95% CI: 1.43, 26.59) and HIV-positive partners' higher income (aOR=2.95; 95% CI = 1.13, 7.70) and lower depression (aOR=0.39; 95% CI = 0.15, 0.97) were associated with viral suppression with no evidence of mediation by adherence. Incorporating relationship dynamics into biomedical strategies is a promising avenue for research and intervention.
    JAIDS Journal of Acquired Immune Deficiency Syndromes 03/2014; · 4.65 Impact Factor
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    ABSTRACT: Objectives. We evaluated a Social Branding antitobacco intervention for "hipster" young adults that was implemented between 2008 and 2011 in San Diego, California. Methods. We conducted repeated cross-sectional surveys of random samples of young adults going to bars at baseline and over a 3-year follow-up. We used multinomial logistic regression to evaluate changes in daily smoking, nondaily smoking, and binge drinking, controlling for demographic characteristics, alcohol use, advertising receptivity, trend sensitivity, and tobacco-related attitudes. Results. During the intervention, current (past 30 day) smoking decreased from 57% (baseline) to 48% (at follow-up 3; P = .002), and daily smoking decreased from 22% to 15% (P < .001). There were significant interactions between hipster affiliation and alcohol use on smoking. Among hipster binge drinkers, the odds of daily smoking (odds ratio [OR] = 0.44; 95% confidence interval [CI] = 0.30, 0.63) and nondaily smoking (OR = 0.57; 95% CI = 0.42, 0.77) decreased significantly at follow-up 3. Binge drinking also decreased significantly at follow-up 3 (OR = 0.64; 95% CI = 0.53, 0.78). Conclusions. Social Branding campaigns are a promising strategy to decrease smoking in young adult bar patrons. (Am J Public Health. Published online ahead of print February 13, 2014: e1-e10. doi:10.2105/AJPH.2013.301666).
    American Journal of Public Health 02/2014; · 3.93 Impact Factor
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    ABSTRACT: Background Research conducted to date has focused primarily on identifying individual-level, psychological determinants of stimulant use and HIV disease management. The present cross-sectional study examined relationship factors as correlates of stimulant use and HIV disease management among men who have sex with men (MSM). Methods In total, 266 male couples completed a baseline assessment for a cohort study examining the role of relationship factors in HIV treatment. A computer-based assessment of relationship factors, self-reported alcohol and substance use, and self-reported anti-retroviral therapy (ART) adherence was administered. All HIV-positive participants also provided a blood sample to measure viral load. Results After controlling for demographic characteristics and relationship factors, men in a primary relationship with a stimulant-using partner had more than six-fold greater odds of reporting any stimulant use in the past three months. Among HIV-positive participants on ART (n = 371), having a stimulant-using partner was independently associated with 67% lower odds of reporting perfect 30-day ART adherence and more than two-fold greater odds of displaying a detectable HIV viral load. In contrast, more partner-level alcohol use was independently associated with greater odds of reporting perfect 3-day ART adherence and lower odds of displaying a detectable HIV viral load. Conclusions Partner-level stimulant use is an important risk factor for individual-level stimulant use and difficulties with HIV disease management among MSM. To optimize the effectiveness of HIV treatment as prevention, clinical research is needed to develop couples–based interventions targeting stimulant use as a potential driver of detectable HIV viral load.
    Drug and alcohol dependence 01/2014; · 3.60 Impact Factor
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    ABSTRACT: Objectives. We compared exposure to secondhand smoke (SHS) and attitudes toward smoke-free bar and nightclub policies among patrons of lesbian, gay, bisexual, and transgender (LGBT) and non-LGBT bars and nightclubs. Methods. We conducted randomized time-location sampling surveys of young adults (aged 21-30 years) in 7 LGBT (n = 1113 patrons) and 12 non-LGBT (n = 1068 patrons) venues in Las Vegas, Nevada, in 2011, as part of a cross-sectional study of a social branding intervention to promote a tobacco-free lifestyle and environment in bars and nightclubs. Results. Compared with non-LGBT bars and nightclubs, patrons of LGBT venues had 38% higher adjusted odds of having been exposed to SHS in a bar or nightclub in the past 7 days but were no less likely to support smoke-free policies and intended to go out at least as frequently if a smoke-free bar and nightclub law was passed. Conclusions. The policy environment in LGBT bars and nightclubs appears favorable for the enactment of smoke-free policies, which would protect patrons from SHS and promote a smoke-free social norm. (Am J Public Health. Published online ahead of print December 12, 2013: e1-e6. doi:10.2105/AJPH.2013.301657).
    American Journal of Public Health 12/2013; · 3.93 Impact Factor
  • Dexter R Voisin, Anna L Hotton, Torsten B Neilands
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    ABSTRACT: Exposure to community violence and HIV sexual risks are two major public health concerns among youth. This study tests various pathways linking exposure to community violence and sexual behaviors among African American adolescents. Using a sample of 563 (61 % females) African American youth attending high school we examined whether problematic psychological symptoms, low school engagement, and/or negative perceptions of peer norms about safer sex functioned as pathways linking exposure to community violence and sexual behaviors. Major findings indicated that, for boys, the relationship between exposure to community violence and sexual début and sexual risk behaviors were linked by aggression. In addition, the relationship between exposure to community violence and sexual risk behaviors were linked by negative perceptions of peer attitudes about safer sex. For girls, the relationship between exposure to community violence and sexual début was linked by aggression and negative perceptions of peer attitudes about safer sex. These findings provide support for pathways linking exposure to community violence to sexual behaviors.
    Journal of Youth and Adolescence 12/2013; · 2.72 Impact Factor
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    ABSTRACT: Objective: Young Black men who have sex with men (YBMSM) are at extraordinarily high risk for HIV infection. Given their dual minority identity, they experience multiple forms of social oppression-racism, homophobia, and poverty. This study tested a model for how these forces contribute to their sexual risk behavior. Method: YBMSM (n = 1,289) from 2 Texas cities completed a 1-time assessment of sexual behaviors and psychosocial variables. Structural equation modeling was used to characterize relationships among variables. Results: Experiences of racism, homophobia, and socioeconomic distress were all associated with unprotected anal intercourse (UAI) either directly or indirectly in a manner largely consistent with Díaz's (1997, 1998) model of the effects of social oppression. Racism, homophobia, and socioeconomic distress were each associated with specific psychological vulnerabilities, which were in turn associated with participation in difficult sexual situations (e.g., in a public setting), and then UAI. The effects of racism were largely mediated by depressive symptoms and participation in difficult sexual situations. Homophobia was mediated by depressive symptoms, social support, and internalized homophobia. The effects of socioeconomic distress were partially mediated by decreased social support and greater participation in difficult sexual situations. Socioeconomic distress also had a significant direct effect on UAI not explained by the proposed mediators. Conclusions: Social oppression contributes to YBMSM's psychological vulnerabilities, participation in difficult sexual situations, and their UAI. Interventions to reduce sexual risk in YBMSM should address socioeconomic disadvantage, homophobia, and racism, as well as the psychological challenges that social oppression creates for them. (PsycINFO Database Record (c) 2013 APA, all rights reserved).
    Health Psychology 11/2013; · 3.83 Impact Factor
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    ABSTRACT: While the relationship context itself is increasingly being examined to understand sexual risk behavior among gay male couples, few studies have examined relationship dynamics and HIV risk longitudinally. We aimed to investigate relationship dynamics and psychosocial predictors of unprotected anal intercourse (UAI) with outside partners of serodiscordant or unknown HIV serostatus (UAIOUT) over time as well as UAI with primary partner in serodiscordant couples (UAIPP). We recruited a sample of 566 ethnically diverse, seroconcordant and serodiscordant couples and interviewed them six times over the course of 3 years. The surveys encompassed relationship dynamics between the partners and sexual behavior with primary and outside partners. We fit generalized linear mixed models for both the UAI outcomes with time and relationship dynamics as predictors while controlling for relationship length. Analyses of the longitudinal data revealed that, in both categories of couples, those with higher levels of positive relationship dynamics (e.g., commitment, satisfaction) were less likely to engage in UAIOUT. Higher investment in sexual agreement and communication were among the factors that significantly predicted less UAIOUT for seroconcordant couples, but not for the serodiscordant couples. For serodiscordant couples, greater levels of attachment and intimacy were associated with greater odds of UAIPP while increased HIV-specific social support was associated with lower odds of UAIPP. These results underscore the importance of creating and tailoring interventions for gay couples that help maintain and strengthen positive relationship dynamics as they have the potential to produce significant changes in HIV risk behavior and thereby in HIV transmission.
    Archives of Sexual Behavior 11/2013; · 3.53 Impact Factor
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    ABSTRACT: Alcohol use among HIV-positive (HIV + ) individuals is associated with decreased adherence to antiretroviral therapy (ART) and consequently poorer HIV treatment outcomes. This study examined the independent association of individual and partner-level alcohol use with HIV disease management among men who have sex with men (MSM) in primary partnerships. In total, 356 HIV+ MSM and their male primary partners completed a baseline visit for a longitudinal study examining the role of couple-level factors in HIV treatment. The Alcohol Use Disorders Identification Test (AUDIT) was administered to assess the individual and the partner-level alcohol use. Primary outcome variables included self-reported ART adherence, ART adherence self-efficacy, and HIV viral load. Results demonstrated that abstainers, compared to hazardous drinkers, had higher self-efficacy to integrate and persevere in HIV treatment and a lower odds of having a detectable viral load. Participants with a partner-abstainer, versus a partner-hazardous drinker, had less self-efficacy to persevere in HIV treatment, a lower odds of 100% three-day adherence and a higher viral load. Together, these findings suggest that assessment and treatment of both the patient's and the patient's primary partner's pattern of alcohol consumption is warranted when attempting to optimize HIV care among MSM.
    AIDS Care 11/2013; · 1.60 Impact Factor
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    ABSTRACT: Discordant couples are unique because neither partner shares the same serostatus. Yet research overlooks how they became discordant, mistakenly assuming that they have always been that way and, by extension, that being discordant impacts the relationship in a similar manner. This study examines HIV infection history and its impact on relationship dynamics using qualitative data from 35 discordant gay male couples. Most couples met discordant (69%); however, many did not (31%). Those couples that met discordant felt being discordant had a lesser impact on their sexual and relational satisfaction, while those that did not meet discordant felt it had a greater impact, reporting sexual frustration and anxiety over seroconverting. This suggests that relationship dynamics may differ for discordant couples depending on HIV infection history. HIV prevention and counseling services for discordant couples can be better tailored and more effective when differences in HIV infection history are recognized.
    Journal of Gay & Lesbian Social Services 10/2013; 25(4).
  • Sara Kalkhoran, Torsten B Neilands, Pamela M Ling
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    ABSTRACT: Objectives. We described frequency of secondhand smoke (SHS) exposure among young adults patronizing bars and associations between SHS exposure, attitudes, and smoking behavior. Methods. We collected cross-sectional surveys from randomized time-location samples of bar patrons aged 18 to 26 years in San Diego, California, and Oklahoma City and Tulsa, Oklahoma, in 2010 to 2011. Multivariate logistic regression evaluated associations between SHS exposure, attitudes about dangers of SHS, susceptibility to smoking initiation among nonsmokers, and quit attempts among current smokers. Results. More than 80% of respondents reported past 7-day exposure to any SHS, and more than 70% reported exposure at a bar. Current smokers reported more SHS exposure in cars and their own homes than did nonsmokers. Among nonsmokers, SHS exposure was associated with susceptibility to initiation, but those who believed that SHS exposure is harmful were less susceptible. Belief that SHS is dangerous was associated with quit attempts among smokers. Conclusions. Smoke-free environments and education about the harms of SHS may decrease tobacco use among young adults who frequent bars, where they are heavily exposed to SHS. (Am J Public Health. Published online ahead of print September 12, 2013: e1-e8. doi:10.2105/AJPH.2013.301287).
    American Journal of Public Health 09/2013; · 3.93 Impact Factor
  • Parya Saberi, Torsten B Neilands, Mallory O Johnson
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    ABSTRACT: Despite numerous potential health outcomes of dog guardianship, their value has not been examined in the HIV-positive population. The study objective was to examine the relationship between dog guardianship and HIV clinical outcomes (antiretroviral adherence [≥95% versus <95%], HIV viral load [≥48 versus <48 copies/mL], and CD4 count) among HIV-positive individuals. The authors conducted a secondary analysis of baseline data of 370 HIV-positive men on antiretroviral regimen enrolled in the Duo Project. Generalized estimating equations were used for inferential regression analyses, while controlling for the focal dog guardianship variable and nonfocal covariates. Current dog guardianship was reported in 28.7% of participants. Dog guardianship may be associated with higher CD4 (coefficient = 60.6, P = .052) and adherence ≥95% (odds ratio [OR] = 1.80, P = .048); however, having a detectable viral load was not related to dog guardianship (OR = 0.94, P = .85). Further clinical research with detailed dog guardianship data is needed to further examine the association between dog guardianship and HIV clinical outcomes.
    Journal of the International Association of Providers of AIDS Care. 06/2013;
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    ABSTRACT: BACKGROUND: Revised Stress and Coping Theory proposes that positive affect serves adaptive functions, independent of negative affect. However, scant research has examined whether, how, and under what circumstances positive affect is associated with decreased substance use. METHODS: Eighty-eight methamphetamine-using men who have sex with men (MSM) completed the baseline assessment for substance abuse treatment outcome study which included measures of positive and negative affect, cognitive-behavioral change processes (i.e., approach-oriented coping, self-efficacy for managing methamphetamine triggers, and abstinence-related action tendencies), abstinence-specific social support, and self-reported substance use. Participants also provided a urine sample for toxicology screening. RESULTS: After controlling for demographic characteristics and negative affect, higher positive affect was independently associated with greater approach-oriented coping, abstinence-related action tendencies, and abstinence-specific social support. Positive affect was also independently associated with greater self-efficacy for managing methamphetamine triggers, but only at lower levels of negative affect. Through these cognitive-behavioral and social pathways, positive affect was indirectly associated with lower frequency of stimulant use in the past 30 days, lower odds of reporting stimulant use two or more days in a row, and lower odds of providing a urine sample that was reactive for stimulant metabolites. On the other hand, negative affect was not indirectly associated with any measure of stimulant use. CONCLUSIONS: Clinical research is needed to examine the pathways whereby positive affect may predict better substance abuse treatment outcomes.
    Drug and alcohol dependence 05/2013; · 3.60 Impact Factor
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    ABSTRACT: Couples’ ability to adopt a “we” orientation has been associated with optimal health outcomes. This study examined how personal and relational motivations are uniquely associated with unprotected anal intercourse (UAI), protected anal intercourse (PAI), and the absence of sexual activity within HIV-serodiscordant same-sex male couples. HIV-positive men and their HIV-negative partners (N = 116 couples, 232 men) completed questionnaires and HIV-positive men had blood drawn for viral load. Results of a multinomial logistic regression illustrated that sexual satisfaction was positively associated with PAI among HIV-negative partners and negatively associated with PAI among HIV-positive partners. Endorsing a “we” orientation was positively associated with PAI among HIV-positive partners. Findings suggest that HIV-positive partners who espouse a “we” orientation may be willing to forgo their personal interests to protect their HIV-negative partners from HIV transmission. Couples-based interventions are warranted to help strengthen relationship dynamics to enhance the sexual health of serodiscordant couples.
    AIDS and Behavior 05/2013; · 3.49 Impact Factor
  • Lucy Popova, Torsten B Neilands, Pamela M Ling
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    ABSTRACT: INTRODUCTION: Tobacco manufacturers' aggressive promotion of new smokeless tobacco products such as snus warrants a timely and effective public health response. This study tested potential countermarketing messages to discourage current and former smokers from becoming dual users of smokeless tobacco and cigarettes. METHODS: In a pretest-post-test experiment, 1836 adult current and recently former smokers from a national sample were randomised to view one of six antismokeless tobacco ads followed by a snus ad, to view a control ad followed by a snus ad; or to view two control ads. Perceived effectiveness of ads and actual changes in attitudes and openness to snus were compared across groups using analyses of variance. RESULTS: Some ads that were perceived as most effective did not change attitudes or openness to trying snus, and conversely, some ads not perceived as effective changed attitudes and openness to snus. Ads portraying the negative health effects of smokeless tobacco were perceived as most effective, but ads with antitobacco industry themes significantly decreased favourable attitudes toward snus. Responses to ads were different for smokers who had ever used smokeless tobacco: for this group health effects and humorous/testimonial ads were effective. CONCLUSIONS: Measures of perceived effectiveness of antitobacco ads need to be augmented with measures of actual effectiveness to assess countermarketing messages. Some of the developed ads, such as ads with anti-industry themes, were effective for the overall population of smokers whereas humorous/testimonial and health effects ads were particularly effective in changing attitudes of past users of smokeless tobacco.
    Tobacco control 03/2013; · 3.85 Impact Factor
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    ABSTRACT: HIV/AIDS stigma continues to be a challenge for HIV prevention and treatment. When health professionals manifest stigma it can limit access to quality treatment. With an ever-growing epidemic among Latinos, including Puerto Ricans living on the Caribbean Island, the social and structural factors that foster HIV/AIDS stigma need to be understood. In this study, we documented the association of religion with HIV/AIDS stigma in a sample of medical students in Puerto Rico. Findings suggest that importance placed on religion, and participation in religious activities, is associated with HIV/AIDS stigma for this population.
    Journal of the International Association of Physicians in AIDS Care (JIAPAC) 02/2013;
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    ABSTRACT: BACKGROUND:: Delays and failures in initiation of antiretroviral therapy (ART) among treatment eligible patients may compromise the effectiveness of HIV care in Africa. An accurate understanding, however, of the pace and completeness of ART initiation and mortality during the waiting period is obscured by frequent losses to follow-up. METHODS:: We evaluated newly ART-eligible HIV-infected adults from 2007 to 2011 in a prototypical clinic in Mbarara, Uganda. A random sample of patients lost to follow-up was tracked in the community to determine vital status and ART initiation after leaving the original clinic. Outcomes among the tracked patients were incorporated using probability weights, and a competing risks approach was used in analyses. RESULTS:: Among 2,633 ART-eligible patients, 490 were lost to follow-up, of whom a random sample of 132 was tracked and 111 (84.0%) had outcomes ascertained. After incorporating the outcomes among the lost, the cumulative incidence of ART initiation at 30, 90 and 365 days after eligibility was 16.0% (95% CI: 14.2-17.7), 64.5% (95% CI: 60.9-68.1), and 81.7% (95% CI: 77.7-85.6). Death prior to ART was 7.7% at one year. Male sex, higher CD4 count, and no education were associated with delayed ART initiation. Lower CD4 level, malnourishment and travel time to clinic were associated with mortality. CONCLUSIONS:: Using a sampling-based approach to account for losses to follow-up revealed that both the speed and completeness of ART initiation were sub-optimal in a prototypical large clinic in Uganda. Improving the kinetics of ART initiation in Africa is needed to make ART optimally effective.
    JAIDS Journal of Acquired Immune Deficiency Syndromes 02/2013; · 4.65 Impact Factor
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    ABSTRACT: Active engagement in HIV clinical care, including uptake and adherence to antiretroviral therapy (ART), is necessary to optimize treatment benefit and can reduce the spread of HIV infection. Among a predominately minority sample of 303 HIV-infected men who have sex with men (MSM) who were either newly diagnosed with HIV or showed evidence of inconsistent engagement in HIV care, we explored rates of exposure to crime, sexual and physical trauma, and associations with factors potentially related to poor engagement in care. Two thirds of participants experienced a crime-related event, and nearly one third reported exposure to physical and/or sexual trauma. All three types of exposure were related to HIV stigma and to concerns about initiating ART. Associations between exposure and social support and HIV disclosure needs were also observed. Findings have implications for the role of trauma exposure and efforts to optimize treatment engagement for HIV-infected MSM.
    The Journal of the Association of Nurses in AIDS Care: JANAC 01/2013; 24(4):299-307. · 0.96 Impact Factor

Publication Stats

2k Citations
398.26 Total Impact Points


  • 2002–2014
    • University of California, San Francisco
      • • Center for AIDS Prevention Studies
      • • Division of Hospital Medicine
      San Francisco, California, United States
  • 2010–2013
    • University of Chicago
      • School of Social Service Administration
      Chicago, Illinois, United States
    • Harvard Medical School
      • Department of Medicine
      Boston, Massachusetts, United States
  • 2009–2013
    • San Francisco State University
      San Francisco, California, United States
    • Columbia University
      • School of Social Work
      New York City, NY, United States
    • University of Puerto Rico at Ponce
      Ponce, Ponce, Puerto Rico
  • 2008–2013
    • CSU Mentor
      • Department of Medicine
      Long Beach, California, United States
    • Oregon State University
      • Department of Public Health (PH)
      Corvallis, OR, United States
    • Drexel University
      • Department of Community Health and Prevention
      Philadelphia, PA, United States
  • 2011
    • Centre for HIV/Aids Prevention Studies
      Johannesburg, Gauteng, South Africa
    • University of California, Santa Barbara
      • Gevirtz Graduate School of Education
      Santa Barbara, CA, United States
  • 2003–2011
    • San Francisco VA Medical Center
      San Francisco, California, United States
  • 2007–2008
    • University of South Florida
      • Department of Community and Family Health
      Tampa, FL, United States
  • 2006
    • San Francisco Department of Public Health
      San Francisco, California, United States
  • 2001
    • University of Texas at Austin
      Austin, Texas, United States