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1.
PLOS Glob Public Health ; 4(5): e0003182, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38768253

RESUMEN

One quarter of the world's population is estimated to be infected with Mycobacterium tuberculosis. Identifying recent TB infection (TBI) offers an avenue to targeted TB preventative therapy provision, and prevention to disease progression. However, detecting recent TBI remains challenging. The QuantiFERON-TB Gold Plus assay (QFT-Plus) claims to have improved sensitivity in detecting recent TBI, by the addition of the TB2 antigen tube to the TB1 tube used in previous tests. TB2 detects CD8-mediated interferon gamma response, a potential marker of recent infection. We compared QFT-Plus TB1 and TB2 responses in individuals with recent and remote infection in high-burden settings. The Tuberculosis Reduction through Expanded Antiretroviral Treatment and TB Screening (TREATS) Project followed a cohort of adolescents and young people (AYP) aged 15-24 years in Zambia and South Africa to determine TBI incidence measured by QFT-Plus over 24 months. We categorised individuals with QTF-Plus positive result into recent and remote infection. We compared their TB1 and TB2 responses and the antigen tube differential [TB2-TB1], an indicator of CD8-activity, using logistic regression. At baseline, 3876 AYP, 1852/3876 (47.8%) were QFT-Plus positive whilst 2024/3876 (52.2%) QFT-Plus negative. Of the QFT-Plus baseline positives, 1069/1852 (57.7%) tested positive at both 12 and 24 months-remote infection. Of the QFT-Plus baseline negatives, 274/2024(13.3%) converted within a 12-month period- recent infection. TB1 and TB2 responses were higher in remote than recent infection. In recent infection, TB2 responses were greater than TB1 responses. The mean differential was 0.01 IU/ml in recent and -0.22 IU/ml in remote infection, (p = 0.145). The quantitative QFT-Plus results did not appear to reflect a marked distinction between recent and remote infection. Further analysis of the responses of infected individuals who developed disease is required to determine whether any signal in QFT-Plus results may predict progression to disease.

2.
PLoS Med ; 20(9): e1004278, 2023 09.
Artículo en Inglés | MEDLINE | ID: mdl-37682971

RESUMEN

BACKGROUND: Tuberculosis (TB) prevalence remains persistently high in many settings, with new or expanded interventions required to achieve substantial reductions. The HIV Prevention Trials Network (HPTN) 071 (PopART) community-randomised trial randomised 14 communities to receive the "PopART" intervention during 2014 to 2017 (7 arm A and 7 arm B communities) and 7 communities to receive standard-of-care (arm C). The intervention was delivered door-to-door by community HIV care providers (CHiPs) and included universal HIV testing, facilitated linkage to HIV care at government health clinics, and systematic TB symptom screening. The Tuberculosis Reduction through Expanded Anti-retroviral Treatment and Screening (TREATS) study aimed to measure the impact of delivering the PopART intervention on TB outcomes, in communities with high HIV and TB prevalence. METHODS AND FINDINGS: The study population of the HPTN 071 (PopART) trial included individuals aged ≥15 years living in 21 urban and peri-urban communities in Zambia and South Africa, with a total population of approximately 1 million and an adult HIV prevalence of around 15% at the time of the trial. Two sputum samples for TB testing were provided to CHiPs by individuals who reported ≥1 TB suggestive symptom (a cough for ≥2 weeks, unintentional weight loss ≥1.5 kg in the last month, or current night sweats) or that a household member was currently on TB treatment. Antiretroviral therapy (ART) was offered universally at clinics in arm A and according to local guidelines in arms B and C. The TREATS study was conducted in the same 21 communities as the HPTN 071 (PopART) trial between 2017 and 2022, and TB prevalence was a co-primary endpoint of the TREATS study. The primary comparison was between the PopART intervention (arms A and B combined) and the standard-of-care (arm C). During 2019 to 2021, a TB prevalence survey was conducted among randomly selected individuals aged ≥15 years (approximately 1,750 per community in arms A and B, approximately 3,500 in arm C). Participants were screened on TB symptoms and chest X-ray, with diagnostic testing using Xpert-Ultra followed by culture for individuals who screened positive. Sputum eligibility was determined by the presence of a cough for ≥2 weeks, or ≥2 of 5 "TB suggestive" symptoms (cough, weight loss for ≥4 weeks, night sweats, chest pain, and fever for ≥2 weeks), or chest X-ray CAD4TBv5 score ≥50, or no available X-ray results. TB prevalence was compared between trial arms using standard methods for cluster-randomised trials, with adjustment for age, sex, and HIV status, and multiple imputation was used for missing data on prevalent TB. Among 83,092 individuals who were eligible for the survey, 49,556 (59.6%) participated, 8,083 (16.3%) screened positive, 90.8% (7,336/8,083) provided 2 sputum samples for Xpert-Ultra testing, and 308 (4.2%) required culture confirmation. Overall, estimated TB prevalence was 0.92% (457/49,556). The geometric means of 7 community-level prevalence estimates were 0.91%, 0.70%, and 0.69% in arms A, B, and C, respectively, with no evidence of a difference comparing arms A and B combined with arm C (adjusted prevalence ratio 1.14, 95% confidence interval, CI [0.67, 1.95], p = 0.60). TB prevalence was higher among people living with HIV than HIV-negative individuals, with an age-sex-community adjusted odds ratio of 2.29 [95% CI 1.54, 3.41] in Zambian communities and 1.61 [95% CI 1.13, 2.30] in South African communities. The primary limitations are that the study was powered to detect only large reductions in TB prevalence in the intervention arm compared with standard-of-care, and the between-community variation in TB prevalence was larger than anticipated. CONCLUSIONS: There was no evidence that the PopART intervention reduced TB prevalence. Systematic screening for TB that is based on symptom screening alone may not be sufficient to achieve a large reduction in TB prevalence over a period of several years. Including chest X-ray screening alongside TB symptom screening could substantially increase the sensitivity of systematic screening for TB. TRIAL REGISTRATION: The TREATS study was registered with ClinicalTrials.gov Identifier: NCT03739736 on November 14, 2018. The HPTN 071 (PopART) trial was registered at ClinicalTrials.gov under number NCT01900977 on July 17, 2013.


Asunto(s)
Infecciones por VIH , VIH , Adulto , Humanos , Sudáfrica/epidemiología , Zambia/epidemiología , Estudios Transversales , Tos , Prevalencia , Infecciones por VIH/diagnóstico , Infecciones por VIH/tratamiento farmacológico , Infecciones por VIH/epidemiología , Proyectos de Investigación
3.
PLOS Glob Public Health ; 3(9): e0002077, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-37773934

RESUMEN

BACKGROUND: From 2018-2021 the TB Reduction through Expanded Antiretroviral Treatment and TB Screening (TREATS) project took place in 21 Zambian and South African communities. The TREATS Incidence of TB Infection Cohort Study was conducted in adolescents and young people (AYP), aged 15-24 years in 14 communities. We describe the baseline prevalence and risk factors of Mycobacterium tuberculosis (M. tuberculosis) infection among this cohort and explore the quantitative QFT-Plus interferon gamma (IFN-γ) responses. METHODS AND FINDINGS: A random sample of approximately 300 AYP per community were recruited and information on TB/HIV risk factors, TB symptoms and social mixing patterns collected. QuantiFERON TB Gold Plus assay (QFT-Plus) was used to detect M. tuberculosis infection, following manufacturer's instructions. Logistic regression was used to determine factors associated with infection. 5577 eligible AYP were invited to participate across both countries, with 4648 enrolled. QFT-Plus results were available for 4529: 2552(Zambia) and 1977(South Africa). Overall, 47.6% (2156/4529) AYP had positive QFT-Plus results, the prevalence of infection in South Africa being twice that in Zambia (64.7% (1280/1977) vs 34.3% (867/2552) p<0.001). Infection was associated with age, household contact with TB and alcohol in Zambia but showed no associations in South Africa. The antigen tube differential (TB2-TB1>0.6 IU/ml) of the assay at baseline showed no evidence of association with recent TB exposure. CONCLUSION: The high prevalence of infection in AYP warrants urgent action to address TB control, especially in South Africa. Further research is required to delineate antigen tube responses of the QFT-Plus assay more precisely to fully realise the benefit of the additional TB2 tube in high TB/HIV burden settings.

4.
PLOS Glob Public Health ; 3(7): e0001473, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-37450474

RESUMEN

BACKGROUND: HPTN071 (PopART) was a cluster randomized trial conducted in Zambian and South African (SA) communities, between 2013-2018. The PopART intervention (universal HIV-testing and treatment (UTT) combined with population-level TB symptom screening) was implemented in 14 communities. The TREATS study (2017-2021) was conducted to evaluate the impact of the PopART intervention on TB outcomes. We report on the impact of the combined TB/HIV intervention on the incidence of TB infection in a cohort of adolescents and young adults (AYA) aged 15-24 years. METHODS: A random sample of AYA was enrolled between July 2018 and July 2019 in 7 intervention vs 7 standard-of-care communities. We collected questionnaire data on risk factors for TB, and blood for measuring TB infection using QuantiFERON (QFT) Plus. AYA were seen at months 12 and 24 with all procedures repeated. Primary outcome was incidence of TB infection comparing intervention and standard-of-care communities. An incident case was defined as a participant with QFT interferon-gamma response of < 0.2 IU/ml plasma ('negative') at baseline and a QFT interferon-gamma response of > = 0.7 IU/ml ('positive') at follow up. RESULTS: We enrolled 4,648 AYA, 2,223 (47.8%) had a negative QFT-plus result at baseline, 1,902 (85.6%) had a follow up blood sample taken at 12 months or 24 months. Among the 1,902 AYA, followed for 2,987 person-years, 213 had incident TB infection giving (7.1 per 100 person-years). TB infection incidence rates were 8.7 per 100 person-years in intervention communities compared to 6.0 per 100 person-years in standard-of-care communities. There was no evidence the intervention reduced the transmission of TB (incidence-rate-ratio of 1.45, 95%CI 0.97-2.15, p = 0.063). CONCLUSION: In our trial setting, we found no evidence that UTT combined with TB active case finding reduced the incidence of TB infection at population level. Our data will inform future modelling work to better understand the population level dynamics of HIV and TB.

5.
BMJ Open ; 12(6): e058195, 2022 06 16.
Artículo en Inglés | MEDLINE | ID: mdl-35710250

RESUMEN

OBJECTIVES: Prevalence surveys remain the best way to assess the national tuberculosis (TB) burden in many countries. Challenges with using culture (the reference standard) for TB diagnosis in prevalence surveys have led to increasing use of molecular tests (Xpert assays), but discordance between these two tests has created problems for deciding which individuals have TB. We aimed to design an accurate diagnostic algorithm for TB prevalence surveys (TBPS) that limits the use of culture. DESIGN: TBPS in four communities, conducted during 2019. SETTING: Three Zambian communities and one South-African community included in the TBPS of the Tuberculosis Reduction through Expanded Anti-retroviral Treatment and Screening study. PARTICIPANTS: Randomly sampled individuals aged ≥15 years. Among those who screened positive on chest X-ray or symptoms, two sputum samples were collected for field Xpert-Ultra testing and a third for laboratory liquid-culture testing. Clinicians reviewed screening and test results; in Zambia, participants with Mycobacterium tuberculosis-positive results were followed up 6-13 months later. Among 10 984 participants, 2092 screened positive, 1852 provided two samples for Xpert-Ultra testing, and 1009 had valid culture results. OUTCOMES: Culture and Xpert-Ultra test results. RESULTS: Among 946 culture-negative individuals, 917 were Xpert-negative, 12 Xpert-trace-positive and 17 Xpert-positive (grade very low, low, medium or high), with Xpert categorised as the highest grade of the two sample results. Among 63 culture-positive individuals, 8 were Xpert-negative, 9 Xpert-trace-positive and 46 Xpert-positive. Counting trace-positive results as positive, the sensitivity of Xpert-Ultra compared with culture was 87% (95% CI 76% to 94%) using two samples compared with 76% (95% CI 64% to 86%) using one. Specificity was 97% when trace-positive results were counted as positive and 98% when trace-positive results were counted as negative. Most Xpert-Ultra-positive/culture-negative discordance was among individuals whose Xpert-positive results were trace-positive or very low grade or they reported previous TB treatment. Among individuals with both Xpert-Ultra results grade low or above, the positive-predictive-value was 90% (27/30); 3/30 were plausibly false-negative culture results. CONCLUSION: Using Xpert-Ultra as the primary diagnostic test in TBPS, with culture only for confirmatory testing, would identify a high proportion of TB cases while massively reducing survey culture requirements. TRIAL REGISTRATION NUMBER: NCT03739736.


Asunto(s)
Mycobacterium tuberculosis , Tuberculosis Pulmonar , Tuberculosis , Humanos , Mycobacterium tuberculosis/genética , Prevalencia , Sensibilidad y Especificidad , Sudáfrica/epidemiología , Esputo/microbiología , Tuberculosis/diagnóstico , Tuberculosis/epidemiología , Tuberculosis Pulmonar/diagnóstico , Zambia/epidemiología
6.
J Int AIDS Soc ; 22(12): e25421, 2019 12.
Artículo en Inglés | MEDLINE | ID: mdl-31840400

RESUMEN

INTRODUCTION: Integrating standardized measures of HIV stigma and discrimination into research studies of emerging HIV prevention approaches could enhance uptake and retention of these approaches, and care and treatment for people living with HIV (PLHIV), by informing stigma mitigation strategies. We sought to develop a succinct set of measures to capture key domains of stigma for use in research on HIV prevention technologies. METHODS: From 2013 to 2015, we collected baseline data on HIV stigma from three populations (PLHIV (N = 4053), community members (N = 5782) and health workers (N = 1560)) in 21 study communities in South Africa and Zambia participating in the HPTN 071 (PopART) cluster-randomized trial. Forty questions were adapted from a harmonized set of measures developed in a consultative, global process. Informed by theory and factor analysis, we developed seven scales, with values ranging from 0 to 3, based on a 4-point agreement Likert, and calculated means to assess different aspects of stigma. Higher means reflected more stigma. We developed two measures capturing percentages of PLHIV who reported experiencing any stigma in communities or healthcare settings in the past 12 months. We validated our measures by examining reliability using Cronbach's alpha and comparing the distribution of responses across characteristics previously associated with HIV stigma. RESULTS: Thirty-five questions ultimately contributed to seven scales and two experience measures. All scales demonstrated acceptable to very good internal consistency. Among PLHIV, a scale captured internalized stigma, and experience measures demonstrated that 22.0% of PLHIV experienced stigma in the community and 7.1% in healthcare settings. Three scales for community members assessed fear and judgement, perceived stigma in the community and perceived stigma in healthcare settings. Similarly, health worker scales assessed fear and judgement, perceived stigma in the community and perceived co-worker stigma in healthcare settings. A higher proportion of community members and health workers reported perceived stigma than the proportion of PLHIV who reported experiences of stigma. CONCLUSIONS: We developed novel, valid measures that allowed for triangulation of HIV stigma across three populations in a large-scale study. Such comparisons will illuminate how stigma influences and is influenced by programmatic changes to HIV service delivery over time.


Asunto(s)
Infecciones por VIH , Estigma Social , Adulto , Atención a la Salud , Femenino , Infecciones por VIH/epidemiología , Infecciones por VIH/prevención & control , Personal de Salud , Humanos , Masculino , Reproducibilidad de los Resultados , Sudáfrica/epidemiología , Zambia/epidemiología
7.
AIDS ; 32(6): 783-793, 2018 03 27.
Artículo en Inglés | MEDLINE | ID: mdl-29369164

RESUMEN

OBJECTIVE: To describe the prevalence and determinants of HIV stigma in 21 communities in Zambia and South Africa. DESIGN: Analysis of baseline data from the HPTN 071 (PopART) cluster-randomized trial. HIV stigma data came from a random sample of 3859 people living with HIV. Community-level exposures reflecting HIV fears and judgements and perceptions of HIV stigma came from a random sample of community members not living with HIV (n = 5088), and from health workers (HW) (n = 851). METHODS: We calculated the prevalence of internalized stigma, and stigma experienced in the community or in a healthcare setting in the past year. We conducted risk-factor analyses using logistic regression, adjusting for clustering. RESULTS: Internalized stigma (868/3859, prevalence 22.5%) was not associated with sociodemographic characteristics but was less common among those with a longer period since diagnosis (P = 0.043). Stigma experienced in the community (853/3859, 22.1%) was more common among women (P = 0.016), older (P = 0.011) and unmarried (P = 0.009) individuals, those who had disclosed to others (P < 0.001), and those with more lifetime sexual partners (P < 0.001). Stigma experienced in a healthcare setting (280/3859, 7.3%) was more common among women (P = 0.019) and those reporting more lifetime sexual partners (P = 0.001) and higher wealth (P = 0.003). Experienced stigma was more common in clusters wherever community members perceived higher levels of stigma, but was not associated with the beliefs of community members or HW. CONCLUSION: HIV stigma remains unacceptably high in South Africa and Zambia and may act as barrier to HIV prevention and treatment. Further research is needed to understand its determinants.


Asunto(s)
Infecciones por VIH/psicología , Estigma Social , Adolescente , Adulto , Femenino , Humanos , Masculino , Prevalencia , Distribución Aleatoria , Factores de Riesgo , Sudáfrica , Adulto Joven , Zambia
8.
J Acquir Immune Defic Syndr ; 77(1): 93-101, 2018 Jan 01.
Artículo en Inglés | MEDLINE | ID: mdl-29016524

RESUMEN

INTRODUCTION: Antiretroviral treatment (ART) guidelines recommend life-long ART for all HIV-positive individuals. This study evaluated tuberculosis (TB) incidence on ART in a cohort of HIV-positive individuals starting ART regardless of CD4 count in a programmatic setting at 3 clinics included in the HPTN 071 (PopART) trial in South Africa. METHODS: A retrospective cohort analysis of HIV-positive individuals aged ≥18 years starting ART, between January 2014 and November 2015, was conducted. Follow-up was continued until 30 May 2016 or censored on the date of (1) incident TB, (2) loss to follow-up from HIV care or death, or (3) elective transfer out; whichever occurred first. RESULTS: The study included 2423 individuals. Median baseline CD4 count was 328 cells/µL (interquartile range 195-468); TB incidence rate was 4.41/100 person-years (95% confidence interval [CI]: 3.62 to 5.39). The adjusted hazard ratio of incident TB was 0.27 (95% CI: 0.12 to 0.62) when comparing individuals with baseline CD4 >500 and ≤500 cells/µL. Among individuals with baseline CD4 count >500 cells/µL, there were no incident TB cases in the first 3 months of follow-up. Adjusted hazard of incident TB was also higher among men (adjusted hazard ratio 2.16; 95% CI: 1.41 to 3.30). CONCLUSIONS: TB incidence after ART initiation was significantly lower among individuals starting ART at CD4 counts above 500 cells/µL. Scale-up of ART, regardless of CD4 count, has the potential to significantly reduce TB incidence among HIV-positive individuals. However, this needs to be combined with strengthening of other TB prevention strategies that target both HIV-positive and HIV-negative individuals.


Asunto(s)
Infecciones por VIH/complicaciones , Tuberculosis/epidemiología , Adolescente , Adulto , Terapia Antirretroviral Altamente Activa , Recuento de Linfocito CD4 , Estudios de Cohortes , Femenino , Infecciones por VIH/tratamiento farmacológico , Humanos , Incidencia , Masculino , Persona de Mediana Edad , Modelos de Riesgos Proporcionales , Estudios Retrospectivos , Sudáfrica/epidemiología , Tuberculosis/complicaciones , Adulto Joven
9.
J Child Adolesc Ment Health ; 26(3): 165-76, 2014.
Artículo en Inglés | MEDLINE | ID: mdl-25533404

RESUMEN

High risk sexual behaviour, alcohol and drug use, and mental health problems combine to yield high levels of HIV-risk behaviour among adolescents with mental health problems. In South Africa, little research has been conducted on parental perspectives of HIV-risk among this population. We conducted a series of focus group discussions with 28 mothers of adolescents receiving services at two mental health clinics in South Africa to identify, from their perspectives, the key community problems facing their children. Participants indicated that HIV remained a serious threat to their adolescent children's well-being, in addition to substance abuse, early sexual debut, and teenage pregnancy. These social problems were mentioned as external to their household dynamics, and thus seemingly beyond the purview of the parent-adolescent relationship. These data have implications for the design of family-based interventions to ameliorate the factors associated with HIV-risk among youth receiving mental health services.


Asunto(s)
Conducta del Adolescente/psicología , Infecciones por VIH/epidemiología , Conocimientos, Actitudes y Práctica en Salud , Trastornos Mentales/epidemiología , Padres/psicología , Asunción de Riesgos , Adolescente , Adulto , Niño , Comorbilidad , Femenino , Grupos Focales , Infecciones por VIH/psicología , Humanos , Masculino , Trastornos Mentales/psicología , Persona de Mediana Edad , Madres/psicología , Madres/estadística & datos numéricos , Investigación Cualitativa , Características de la Residencia , Factores de Riesgo , Conducta Sexual/psicología , Conducta Sexual/estadística & datos numéricos , Sudáfrica/epidemiología , Trastornos Relacionados con Sustancias/epidemiología , Trastornos Relacionados con Sustancias/psicología
10.
AIDS Care ; 25(8): 1026-32, 2013 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-23327560

RESUMEN

South Africa has the highest prevalence of HIV in the world. Because living with HIV is stressful and because alcohol consumption is often used to cope with stress, we examined whether stress mediates the association between HIV status and alcohol use among adults residing in South African townships. Field workers approached pedestrians or patrons of informal alcohol-serving venues (i.e., shebeens) and invited their participation in a survey. Of the 1717 participants (98% Black, 34% women, mean age = 31 years), 82% were HIV-negative, 9% were HIV-positive, and 9% did not know their test result. Participants living with HIV reported greater perceived life stress compared to participants whose HIV status was negative or unknown. Perceived stress was associated with an increase in the frequency of alcohol use (drinking days, intoxication, and drinking in shebeens/taverns). Subsequent analyses showed that stress mediated the association between HIV status and alcohol use. These findings indicate that greater frequency of drinking days, perceived intoxication, and drinking at shebeens was associated with elevated stress levels among participants who were HIV positive. Perceived life stress mediates the association between HIV status and alcohol use. Programs to enhance stress management among HIV-positive South Africans may help to reduce alcohol consumption, which may, in turn, lead to reduced rates of HIV transmission.


Asunto(s)
Consumo de Bebidas Alcohólicas/psicología , Actitud Frente a la Salud , Infecciones por VIH/psicología , Estado de Salud , Estrés Psicológico/psicología , Adulto , Consumo de Bebidas Alcohólicas/epidemiología , Femenino , Infecciones por VIH/epidemiología , Humanos , Masculino , Factores de Riesgo , Sudáfrica/epidemiología , Estrés Psicológico/epidemiología
11.
Sex Transm Infect ; 87(3): 242-7, 2011 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-21164149

RESUMEN

OBJECTIVES: The South African government recently launched a national campaign to test 15 million South Africans for HIV by 2011. Little is known about how receipt of HIV testing might influence interpersonal communication. To explore these questions, the authors examined the effects of prior HIV testing on sexual health communication among South Africans. METHODS: Adults (N=1284; 98% black, 36% women, mean age 31) residing in a South African township completed street-intercept surveys. RESULTS: Of the 1284 participants, 811 (63%) had been tested for HIV. Among those who had been tested, 77% tested negative, 12% tested positive, and 11% did not know their test result or refused to answer. Compared with those who had not been tested, participants who had been tested for HIV were more likely to communicate with community members about (a) HIV/AIDS, (b) getting tested for HIV, and (c) using condoms. Testing positive for HIV was associated with communication with sexual partners about condom use. Among participants who had been tested for HIV, exploratory analyses revealed that those who had engaged in sexual health communication with community members or sexual partners reported more condom-protected sex than those who had not engaged in sexual health communication. CONCLUSIONS: HIV testing is associated with sexual health communication among South African community members and sexual partners. Offering HIV testing to all South Africans may increase communication and lead to reductions in sexual risk.


Asunto(s)
Infecciones por VIH/diagnóstico , Comunicación en Salud , Conducta Sexual , Adulto , Condones/estadística & datos numéricos , Revelación , Femenino , Humanos , Masculino , Factores de Riesgo , Sudáfrica
12.
J Behav Med ; 34(1): 32-40, 2011 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-20680673

RESUMEN

We investigated alcohol-related sexual risk behavior from the perspective of social norms theory. Adults (N = 895, 62% men) residing in a South African township completed street-intercept surveys that assessed risk and protective behaviors (e.g., multiple partners, drinking before sex, meeting sex partners in shebeens, condom use) and corresponding norms. Men consistently overestimated the actual frequency of risky behaviors, as reported by the sample, and underestimated the frequency of condom use. Relative to actual attitudes, men believed that other men were more approving of risk behavior and less approving of condom use. Both behavioral and attitudinal norms predicted the respondents' self-reported risk behavior. These findings indicate that correcting inaccurate norms in HIV-risk reduction efforts is worthwhile.


Asunto(s)
Infecciones por VIH/prevención & control , Conocimientos, Actitudes y Práctica en Salud , Conducta de Reducción del Riesgo , Conducta Sexual , Valores Sociales , Adolescente , Adulto , Anciano , Consumo de Bebidas Alcohólicas , Condones/estadística & datos numéricos , Estudios Transversales , Femenino , Humanos , Masculino , Persona de Mediana Edad , Análisis Multivariante , Análisis de Regresión , Sexo Seguro , Parejas Sexuales , Sudáfrica
13.
Ann Behav Med ; 36(3): 270-9, 2008 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-18836789

RESUMEN

BACKGROUND: HIV is devastating southern Africa and alcohol use is closely related to HIV transmission risks. PURPOSE: The current study tested the efficacy of a brief single-session HIV-alcohol risk-reduction intervention for men and women who drink at informal alcohol serving establishments (i.e., shebeens) in South Africa. METHODS: A randomized community field trial recruited men (N = 117) and women (N = 236) through outreach and chain referrals. Participants received either: (a) 3-h theory-based behavioral HIV-alcohol risk-reduction intervention that focused on skills training for sexual negotiation and condom use or (b) 1-h HIV-alcohol information/education control group. Participants were followed up for 3 and 6 months post-intervention with 89% retention. RESULTS: The risk-reduction intervention demonstrated significantly less unprotected intercourse, alcohol use before sex, numbers of sex partners, partners met at drinking establishments and greater condom use relative to the control group. However, intervention effects were moderated by alcohol use; lighter drinkers demonstrated significantly more intervention gains than heavier drinkers in the risk-reduction condition. Intervention effects occurred at 3 months follow-up and dissipated by 6 months. CONCLUSIONS: A brief HIV risk-reduction intervention reduced sexual-risk behaviors among drinkers in South Africa. However, intervention effects were weakest for those who drink heaviest. Our results provide a basis for establishing HIV prevention in alcohol serving establishments in South Africa. Research is needed to identify multi-level intervention models that can reduce risks among heavier drinkers and sustain behavior changes over time.


Asunto(s)
Consumo de Bebidas Alcohólicas/efectos adversos , Infecciones por VIH/prevención & control , Adulto , Relaciones Comunidad-Institución , Condones , Femenino , Educación en Salud , Humanos , Masculino , Conducta de Reducción del Riesgo , Conducta Sexual , Sudáfrica
14.
Addict Behav ; 33(12): 1630-3, 2008 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-18790575

RESUMEN

Alcohol is related to HIV risk behaviors in southern Africa and these behaviors are correlated with sensation seeking personality and alcohol outcome expectancies. Here we report for the first time the associations among sensation seeking, substance use, and sexual risks in a prospective study in Africa. Sexually transmitted infection clinic patients in Cape Town South Africa (157 men and 64 women) completed (a) baseline measures of sensation seeking, sexual enhancement alcohol outcome expectancies, alcohol use in sexual contexts, and unprotected sexual behaviors and (b) 6-month follow-up measures of alcohol use in sexual contexts and unprotected sexual acts. Results confirmed that sensation seeking predicts HIV risk behavior and sensation seeking is related to alcohol outcome expectancies which in turn predict alcohol use in sexual contexts. HIV prevention counseling that addresses drinking in relation to sex is urgently needed in southern Africa.


Asunto(s)
Consumo de Bebidas Alcohólicas/psicología , Infecciones por VIH/psicología , VIH-1 , Asunción de Riesgos , Adulto , Consumo de Bebidas Alcohólicas/prevención & control , Femenino , Infecciones por VIH/prevención & control , Infecciones por VIH/transmisión , Humanos , Masculino , Servicio Ambulatorio en Hospital , Estudios Prospectivos , Factores de Riesgo , Sudáfrica , Sexo Inseguro/psicología
15.
Prev Sci ; 9(1): 55-62, 2008 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-18264762

RESUMEN

HIV/AIDS is devastating southern Africa and the spread of HIV is fueled in some populations by alcohol use. Alcohol serving establishments, such as informal drinking places or shebeens, often serve as high-risk venues for HIV transmission. The current study examined the HIV risks of men (N = 91) and women (N = 248) recruited from four shebeens in a racially integrating township in Cape Town South Africa. Participants completed confidential measures of demographic characteristics, HIV risk history, alcohol and drug use, and HIV risk behaviors. Comparisons of 94 (28%) participants who reported meeting sex partners at shebeens to the remaining sample of shebeen goers, controlling for potential confounds, demonstrated a pattern of higher risk for HIV infection among persons who met sex partners at shebeens. Few differences, however, were observed between men (N = 47) and women (N = 47) who had met sex partners at shebeens, suggesting greater gender similarities than gender differences in this important subpopulation. These results indicate an urgent need for multi-level HIV prevention interventions targeting shebeens and the men and women who drink in these settings.


Asunto(s)
Síndrome de Inmunodeficiencia Adquirida/transmisión , Consumo de Bebidas Alcohólicas , Infecciones por VIH/transmisión , Conducta Sexual , Síndrome de Inmunodeficiencia Adquirida/epidemiología , Adulto , Femenino , Infecciones por VIH/epidemiología , Humanos , Modelos Logísticos , Masculino , Asunción de Riesgos , Parejas Sexuales , Sudáfrica/epidemiología
16.
J Acquir Immune Defic Syndr ; 44(5): 594-600, 2007 Apr 15.
Artículo en Inglés | MEDLINE | ID: mdl-17325606

RESUMEN

BACKGROUND: HIV is ravaging southern Africa, and HIV transmission risk behaviors are facilitated by alcohol use in sexual contexts. There are no known interventions that directly target HIV risk behavior among people who drink and are at risk for HIV in Africa. PURPOSE: To test a behavioral risk reduction counseling intervention for use in sexually transmitted infection (STI) clinics in southern Africa. METHODS: A randomized intervention trial was conducted with 143 STI clinic patients in Cape Town, South Africa. Participants received an experimental 60-minute HIV and alcohol risk reduction behavioral skills intervention or a control 20-minute HIV education condition. Participants were followed for 3 and 6 months after the intervention, with 73% retention. RESULTS: Overall, the experimental intervention demonstrated more than a 25% increase in condom use and a 65% reduction in unprotected intercourse over the 6-month follow-up period, with risk reduction significantly greater for the experimental condition than for the control condition at both follow-ups. Alcohol use in sexual contexts [F(1,94) = 6.2; P < 0.05] and expectancies that alcohol enhances sexual experiences [F(1,94) = 8.3; P < 0.01] were also significantly lower for the experimental condition at the 3-month follow-up. CONCLUSIONS: An HIV prevention counseling intervention reduced HIV transmission risks for up to 6 months in this STI clinic population. Effects may be sustained with structural interventions to reduce alcohol use in sexual contexts and support risk reduction behavior changes over the long-term.


Asunto(s)
Consumo de Bebidas Alcohólicas , Infecciones por VIH/prevención & control , Adulto , Condones/estadística & datos numéricos , Consejo , Femenino , Infecciones por VIH/transmisión , Humanos , Masculino , Evaluación de Resultado en la Atención de Salud , Conducta de Reducción del Riesgo , Sudáfrica , Sexo Inseguro/prevención & control
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