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Respondent driven sampling

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https://www.readbyqxmd.com/read/28202736/hiv-and-sti-s-among-men-who-have-sex-with-men-in-dodoma-municipality-tanzania-a-cross-sectional-study
#1
Elia John Mmbaga, Kåre Moen, Neema Makyao, Rose Mpembeni, Melkizedeck T Leshabari
OBJECTIVES: To determine the seroprevalence of HIV, STI and related risks among men who have sex with men (MSM) in Dodoma municipality, Tanzania. METHODS: A cross-sectional study using respondent-driven sampling was employed to recruit study participants aged 18 years and above. Data on sociodemographics, HIV/STI knowledge and sexual practices were collected. Blood samples were tested for HIV and selected STIs. RESULTS: A total of 409 participants aged from 18 to 60 years took part in this study...
February 15, 2017: Sexually Transmitted Infections
https://www.readbyqxmd.com/read/28188030/unveiling-of-hiv-dynamics-among-transgender-women-a-respondent-driven-sampling-study-in-rio-de-janeiro-brazil
#2
Beatriz Grinsztejn, Emilia M Jalil, Laylla Monteiro, Luciane Velasque, Ronaldo I Moreira, Ana Cristina F Garcia, Cristiane V Castro, Alícia Krüger, Paula M Luz, Albert Y Liu, Willi McFarland, Susan Buchbinder, Valdilea G Veloso, Erin C Wilson
BACKGROUND: The burden of HIV in transgender women (transwomen) in Brazil remains unknown. We aimed to estimate HIV prevalence among transwomen in Rio de Janeiro and to identify predictors of newly diagnosed HIV infections. METHODS: We recruited transwomen from Rio de Janeiro, Brazil, by respondent-driven sampling. Eligibility criteria were self-identification as transwomen, being 18 years of age or older, living in Rio de Janeiro or its metropolitan area, and having a valid peer recruitment coupon...
February 7, 2017: Lancet HIV
https://www.readbyqxmd.com/read/28169873/physical-and-sexual-violence-affecting-female-sex-workers-in-abidjan-c%C3%A3-te-d-ivoire-prevalence-and-the-relationship-between-violence-the-work-environment-hiv-and-access-to-health-services
#3
Carrie Lyons, Sosthenes Ketende, Fatou Drame, Ashley Grosso, Daouda Diouf, Ibrahima Ba, Kate Shannon, Rebecca Ezouatchi, Amara Bamba, Abo Kouame, Stefan Baral
BACKGROUND: Violence is a human rights violation, and an important measure in understanding HIV among female sex workers (FSW). However, limited data exist regarding correlates of violence among FSW in Côte d'Ivoire. Characterizing prevalence and determinants of violence and the relationship with structural risks for HIV can inform development and implementation of comprehensive HIV prevention and treatment programs. METHODS: FSW > 18 years were recruited through respondent driven sampling (RDS) in Abidjan, Côte d'Ivoire...
February 6, 2017: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/28163365/recruiting-and-assessing-recent-young-adult-latina-immigrants-in-health-disparities-research
#4
Diana M Sheehan, Frank R Dillon, Rosa Babino, James Melton, Christine Spadola, Nicole Da Silva, Mario De La Rosa
The authors interviewed 4 researchers to identify facilitators in recruiting and assessing Latina immigrants. The 4 researchers recruited 530 recent Latina immigrants (ages 18-23 years) for a study of social and cultural determinants of health. Consensual qualitative research methods revealed that respondent-driven sampling was an effective recruitment method. Fear of deportation was a barrier. Stigma about sensitive topics (e.g., sex, drug use) did not affect participation. Findings can help counselors conduct health disparities research...
October 2016: Journal of Multicultural Counseling and Development
https://www.readbyqxmd.com/read/28152789/does-oncology-patient-reported-healthcare-experience-vary-by-site-of-care-soc
#5
Adrianne Waldman Casebeer, Sari Hopson, Joseph Dye, Zhuliang Tao, Andrew M Howe, Stephen Stemkowski, Jeffrey Patton, Art Small, Anthony Masaquel
: 71 Background: Patients with cancer are increasingly receiving chemotherapy infusions in a hospital outpatient (HO) as compared to the physician practice setting (PO). Previous research has focused on SOC differences in economic measures, such as healthcare costs, in commercially insured populations. This study investigates SOC differences in patients' reported healthcare experience for a mostly Medicare population. METHODS: A convenience sample of 2,604 Humana members with cancer of the breast, lung, colon/rectum or NHL/CLL and treated in 2014 received a survey by mail to capture patient reported healthcare experiences...
March 2016: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/28152026/hiv-prevalence-and-gender-differences-among-new-injection-drug-users-in-tallinn-estonia-a-persisting-problem-in-a-stable-high-prevalence-epidemic
#6
Anneli Uusküla, Mait Raag, Kristina Marsh, Ave Talu, Sigrid Vorobjov, Don Des Jarlais
INTRODUCTION: New injectors / younger drug users are an important population to target for intervention because they are often at especially high risk of HIV and HCV infection. We examined HIV prevalence and gender differences in HIV prevalence and risk behavior among new injection-drug-users in Tallinn, Estonia. METHODS: Respondent driven sampling (RDS) interview surveys and HIV testing were conducted in Tallinn in 2009, 2011 and 2013. We classified "new injectors" as persons who reported their first injection as occurring within three years of the study interview...
2017: PloS One
https://www.readbyqxmd.com/read/28143462/a-study-on-the-influence-of-internet-addiction-and-online-interpersonal-influences-on-health-related-quality-of-life-in-young-vietnamese
#7
Bach Xuan Tran, Le Thi Huong, Nguyen Duc Hinh, Long Hoang Nguyen, Bao Nguyen Le, Vuong Minh Nong, Vu Thi Minh Thuc, Tran Dinh Tho, Carl Latkin, Melvyn Wb Zhang, Roger Cm Ho
BACKGROUND: Internet addiction (IA) is a common problem found in young Asians. This study aimed to study the influence of IA and online activities on health-related quality of life (HRQOL) in young Vietnamese. This study also compared the frequencies of anxiety, depression and other addiction of young Vietnamese with and without IA. METHODS: This study recruited 566 young Vietnamese (56.7% female, 43.3% male) ranging from 15 to 25 years of age via the respondent-driven sampling technique...
January 31, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28139544/a-single-weighting-approach-to-analyze-respondent-driven-sampling-data
#8
Vadivoo Selvaraj, Kangusamy Boopathi, Ramesh Paranjape, Sanjay Mehendale
BACKGROUND AND OBJECTIVES: Respondent-driven sampling (RDS) is widely used to sample hidden populations and RDS data are analyzed using specially designed RDS analysis tool (RDSAT). RDSAT estimates parameters such as proportions. Analysis with RDSAT requires separate weight assignment for individual variables even in a single individual; hence, regression analysis is a problem. RDS-analyst is another advanced software that can perform three methods of estimates, namely, successive sampling method, RDS I and RDS II...
September 2016: Indian Journal of Medical Research
https://www.readbyqxmd.com/read/28138799/population-size-estimation-of-men-who-have-sex-with-men-in-ho-chi-minh-city-and-nghe-an-using-social-app-multiplier-method
#9
Ali Safarnejad, Nguyen Thien Nga, Vo Hai Son
This study aims to estimate the number of men who have sex with men (MSM) in Ho Chi Minh City (HCMC) and Nghe An province, Viet Nam, using a novel method of population size estimation, and to assess the feasibility of the method in implementation. An innovative approach to population size estimation grounded on the principles of the multiplier method, and using social app technology and internet-based surveys was undertaken among MSM in two regions of Viet Nam in 2015. Enumeration of active users of popular social apps for MSM in Viet Nam was conducted over 4 weeks...
January 30, 2017: Journal of Urban Health: Bulletin of the New York Academy of Medicine
https://www.readbyqxmd.com/read/28132516/using-a-social-ecological-framework-to-characterize-the-correlates-of-hiv-among-men-who-have-sex-with-men-in-lom%C3%A3-togo
#10
Horacio Ruiseñor-Escudero, Ashley Grosso, Sosthenes Ketende, Vincent Pitche, Anato Simplice, Jules Tchalla, Dometo Sodji, Ben Liestman, Laurent Kapesa, Stefan Baral
In the mixed and concentrated HIV epidemics of West Africa, the relative disproportionate burden of HIV among men who have sex with men (MSM) compared to other reproductive-age men is higher than that observed in Southern and Eastern Africa. Our aim is to describe the correlates of HIV infection among MSM living in Lomé, Togo, using the Modified Social Ecological Model (MSEM). A total of 354 MSM ≥18 years of age were recruited using respondent driven sampling (RDS) for a cross-sectional survey in Lomé, Togo...
January 29, 2017: AIDS Care
https://www.readbyqxmd.com/read/28130496/induction-of-il21-in-peripheral-t-follicular-helper-cells-is-an-indicator-of-influenza-vaccine-response-in-a-previously-vaccinated-hiv-infected-pediatric-cohort
#11
Lesley R de Armas, Nicola Cotugno, Suresh Pallikkuth, Li Pan, Stefano Rinaldi, M Celeste Sanchez, Louis Gonzalez, Alberto Cagigi, Paolo Rossi, Paolo Palma, Savita Pahwa
HIV-infected patients of all ages frequently underperform in response to seasonal influenza vaccination, despite virologic control of HIV. The molecular mechanisms governing this impairment, as well as predictive biomarkers for responsiveness, remain unknown. This study was performed in samples obtained prevaccination (T0) from HIV-infected children who received the 2012-2013 seasonal influenza vaccine. Response status was determined based on established criterion for hemagglutination inhibition titer; participants with a hemagglutination titer ≥1:40 plus a ≥4-fold increase over T0 at 3 wk postvaccination were designated as responders...
January 27, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28126110/a-comparison-of-network-sampling-designs-for-a-hidden-population-of-drug-users-random-walk-vs-respondent-driven-sampling
#12
David C Bell, Elizabeth B Erbaugh, Tabitha Serrano, Cheryl A Dayton-Shotts, Isaac D Montoya
Both random walk and respondent-driven sampling (RDS) exploit social networks and may reduce biases introduced by earlier methods for sampling from hidden populations. Although RDS has become much more widely used by social researchers than random walk (RW), there has been little discussion of the tradeoffs in choosing RDS over RW. This paper compares experiences of implementing RW and RDS to recruit drug users to a network-based study in Houston, Texas. Both recruitment methods were implemented over comparable periods of time, with the same population, by the same research staff...
February 2017: Social Science Research
https://www.readbyqxmd.com/read/28123223/using-population-size-estimation-and-cross-sectional-survey-methods-to-evaluate-hiv-service-coverage-among-key-populations-in-burkina-faso-and-togo
#13
Claire E Holland, Seni Kouanda, Marcel Lougué, Vincent Palokinam Pitche, Sheree Schwartz, Simplice Anato, Henri Gautier Ouedraogo, Jules Tchalla, Clarence S Yah, Laurent Kapesa, Sosthenes Ketende, Chris Beyrer, Stefan Baral
OBJECTIVES: The objective of our study was to measure progress toward the UNAIDS 90-90-90 HIV care targets among key populations in urban areas of 2 countries in West Africa: Burkina Faso and Togo. METHODS: We recruited female sex workers (FSWs) and men who have sex with men (MSM) through respondent-driven sampling. From January to July 2013, 2738 participants were enrolled, tested for HIV, and completed interviewer-administered surveys. We used population-size estimation methods to calculate the number of people who were engaged in the HIV continuum of care...
November 2016: Public Health Reports
https://www.readbyqxmd.com/read/28112946/temporal-dynamics-of-in-field-bioreactor-populations-reflect-the-groundwater-system-and-respond-predictably-to-perturbation
#14
Andrew J King, Sarah P Preheim, Kathryn L Bailey, Michael S Robeson, Taniya Roy Chowdhury, Bryan R Crable, Richard A Hurt, Tonia L Mehlhorn, Kenneth A Lowe, Tommy J Phelps, Anthony V Palumbo, Craig C Brandt, Steven D Brown, Mircea Podar, Ping Zhang, William Andrew Lancaster, Farris L Poole, David B Watson, Matthew W W Fields, John-Marc Chandonia, Eric J Alm, Jizhong Zhou, Michael W W Adams, Terry C Hazen, Adam P Arkin, Dwayne A Elias
Temporal variability complicates testing the influences of environmental variability on microbial community structure and thus function. An in-field bioreactor system was developed to assess oxic versus anoxic manipulations on in-situ groundwater communities. Each sample was sequenced (16S SSU rRNA genes, average 10,000 reads) and biogeochemical parameters monitored by quantifying 53 metals, 12 organic acids, 14 anions and 3 sugars. Changes in dissolved oxygen (DO), pH, and other variables were similar across bioreactors...
January 23, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28109340/effectiveness-of-an-integrated-community-and-clinic-based-intervention-on-hiv-testing-hiv-knowledge-and-sexual-risk-behavior-of-young-men-who-have-sex-with-men-in-myanmar
#15
Poe Poe Aung, Claire Ryan, Ashish Bajracharya, Naanki Pasricha, Zaw Win Thein, Paul A Agius, Than Tun Sein, Lisa Willenberg, Ei Mon Soe, Ne Tun Zaw, Waimar Tun, Eileen Yam, Stanley Luchters
PURPOSE: Young men who have sex with men (YMSM) in Myanmar are disproportionately affected by HIV, with prevalence five times that of the general population. The Link Up project implemented an intervention using peer education and outreach providing education and counseling on health seeking around sexually transmitted infections and reproductive health, combined with focused clinic capacity building to improve the sexual and reproductive health of YMSM. This study aimed to evaluate the effectiveness and acceptability of the intervention...
February 2017: Journal of Adolescent Health: Official Publication of the Society for Adolescent Medicine
https://www.readbyqxmd.com/read/28108879/patterns-of-social-affiliations-and-healthcare-engagement-among-young-black-men-who-have-sex-with-men
#16
Rachel L Behler, Benjamin T Cornwell, John A Schneider
Little work has examined how individuals' social affiliations-the venues in which they meet friends and engage in informal social interaction-influence their engagement with public health services. We investigate how links to these local places shape access to information and exposure to health-seeking behavior. Using longitudinal data from a respondent-driven sample of 618 young black men who have sex with men (YBMSM) in Chicago, we identify different sets of social venues that connect YBMSM. We then examine how YBMSM's connections within this network influence their receipt of HIV prevention and treatment services and knowledge of pre-exposure prophylaxis (PrEP)...
January 21, 2017: AIDS and Behavior
https://www.readbyqxmd.com/read/28103896/sexual-and-reproductive-health-services-utilization-by-female-sex-workers-is-context-specific-results-from-a-cross-sectional-survey-in-india-kenya-mozambique-and-south-africa
#17
Yves Lafort, Ross Greener, Anuradha Roy, Letitia Greener, Wilkister Ombidi, Faustino Lessitala, Jolene Skordis-Worrall, Mags Beksinska, Peter Gichangi, Sushena Reza-Paul, Jenni A Smit, Matthew Chersich, Wim Delva
BACKGROUND: Female sex workers (FSWs) are extremely vulnerable to adverse sexual and reproductive health (SRH) outcomes. To mitigate these risks, they require access to services covering not only HIV prevention but also contraception, cervical cancer screening and sexual violence. To develop context-specific intervention packages to improve uptake, we identified gaps in service utilization in four different cities. METHODS: A cross-sectional survey was conducted, as part of the baseline assessment of an implementation research project...
January 19, 2017: Reproductive Health
https://www.readbyqxmd.com/read/28099458/gender-differences-in-factors-related-to-hiv-risk-behaviors-among-people-who-inject-drugs-in-north-east-india
#18
Bushra Sabri, Allison M McFall, Sunil S Solomon, Aylur K Srikrishnan, Canjeevaram K Vasudevan, Santhanam Anand, David D Celentano, Shruti H Mehta, Suresh Kumar, Gregory M Lucas
People who inject drugs (PWID) in India are at high risk for HIV, with women being at elevated risk. Using a socio-ecological framework, this study assessed whether factors associated with HIV transmission risk behaviors differed across men and women PWID. Data for this cross-sectional study were collected from 6449 PWID in 7 cities in Northeast India. Men (n = 5653) and women (n = 796) PWID were recruited using respondent-driven sampling (RDS). We assessed sex differences in two recent HIV transmission risk behaviors: multiple sex partners and needle/syringe sharing...
2017: PloS One
https://www.readbyqxmd.com/read/28088084/correlates-of-anti-hepatitis-c-positivity-and-use-of-harm-reduction-services-among-people-who-inject-drugs-in-two-cities-in-croatia
#19
Senad Handanagic, Sandra Sevic, Jelena Barbaric, Zoran Dominkovic, Oktavija Dakovic Rode, Josip Begovac, Ivana Bozicevic
BACKGROUND: We assessed correlates of anti-hepatitis C (anti-HCV) positivity and utilization of needle and syringe exchange programs (NSEP) and opioid agonist treatment (OAT) among people who inject drugs (PWID) in two Croatian cities. METHODS: We conducted a cross-sectional study using respondent-driven (RDS) sampling among PWID in Rijeka (N=255) and Split (N=399). We used RDS-weighted population estimates and multivariable logistic regression to explore correlates of anti-HCV positivity and NSEP and OAT utilization...
December 7, 2016: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/28058567/sexual-risk-and-transmission-behaviors-partnerships-and-settings-among-young-adult-nonmedical-opioid-users-in-new-york-city
#20
S R Friedman, P Mateu-Gelabert, K V Ruggles, E Goodbody, C Syckes, L Jessell, Jennifer Teubl, H Guarino
Nonmedical prescription opioid use has become widespread. It can lead to heroin use, drug injection and HIV infection. We describe young adult opioid users' sexual risk behavior, partnerships and settings. 464 youth aged 18-29 who reported opioid use in the past 30 days were recruited using Respondent-Driven Sampling. Eligible participants completed a computer-assisted, interviewer-administered risk questionnaire and were tested for STIs and HIV. Participants (33% female; 66% white non-Hispanic) almost all had sex in the prior 90 days; 42% reported more than one partner...
January 5, 2017: AIDS and Behavior
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