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Respondent driven sampling

Michael M Bechtel, Roman Liesch, Kenneth F Scheve
Political polarization and extremism are widely thought to be driven by the surge in economic inequality in many countries around the world. Understanding why inequality persists depends on knowing the causal effect of inequality on individual behavior. We study how inequality affects redistribution behavior in a randomized "give-or-take" experiment that created equality, advantageous inequality, or disadvantageous inequality between two individuals before offering one of them the opportunity to either take from or give to the other...
March 19, 2018: Proceedings of the National Academy of Sciences of the United States of America
Daniel Nyato, Evodius Kuringe, Mary Drake, Caterina Casalini, Soori Nnko, Amani Shao, Albert Komba, Stefan D Baral, Mwita Wambura, John Changalucha
BACKGROUND: Across sub-Saharan Africa (SSA), HIV disproportionately affects men-who-have-sex-with-men (MSM) compared with other men of the same age group in the general population. Access to HIV services remains low among this group although several effective interventions have been documented. It is therefore important to identify what has worked well to increase the reach of HIV services among MSM. METHODS: We searched MEDLINE, POPLINE and the Web of Science databases to collect published articles reporting HIV interventions among MSM across sub-Saharan Africa...
March 20, 2018: BMC Public Health
Zhi-Wei Lai, Ryan Kelly, Thomas Winans, Ivan Marchena, Ashwini Shadakshari, Julie Yu, Maha Dawood, Ricardo Garcia, Hajra Tily, Lisa Francis, Stephen V Faraone, Paul E Phillips, Andras Perl
BACKGROUND: Patients with systemic lupus erythematosus have T-cell dysfunction that has been attributed to the activation of the mammalian target of rapamycin (mTOR). Rapamycin inhibits antigen-induced T-cell proliferation and has been developed as a medication under the generic designation of sirolimus. We assessed safety, tolerance, and efficacy of sirolimus in a prospective, biomarker-driven, open-label clinical trial. METHODS: We did a single-arm, open-label, phase 1/2 trial of sirolimus in patients with active systemic lupus erythematosus disease unresponsive to, or intolerant of, conventional medications at the State University of New York Upstate Medical University (Syracuse, NY, USA)...
March 15, 2018: Lancet
Gustavo Machado Rocha, Lígia Regina Franco Sansigolo Kerr, Carl Kendall, Mark Drew Crosland Guimarães
HIV/AIDS epidemic is not well controlled, and multiple sexual behavior factors help explain high rates of HIV infection among men who have sex with men (MSM). This article proposes to exam the use of a potential risk behavior score for HIV infection, based on the type and number of sexual partners, and condom use, and their associated factors in a sample of MSM in Brazil. A cross sectional RDS (Respondent Driven Sampling) study was performed among 3738 MSM aged 18+ years old from ten Brazilian cities. The risk behavior score was composed by the number of male partners and anal condom use in the last year with steady, casual, and commercial partners...
March 15, 2018: Brazilian Journal of Infectious Diseases
Julie Franks, Sharon B Mannheimer, Yael Hirsch-Moverman, Eleanor Hayes-Larson, Paul W Colson, Hugo Ortega, Wafaa M El-Sadr
INTRODUCTION: Black men who have sex with men and transgender women are at high risk for HIV infection, but are more likely to be unaware of their infection or not in care for diagnosed HIV compared to other races. Respondent driven sampling has been advanced as a method to reach stigmatized and hidden populations for HIV testing. We compared strategies to recruit black, substance-using men who have sex with men and transgender women to identify newly diagnosed HIV infection, or those previously diagnosed but not in care...
March 2018: Journal of the International AIDS Society
Kiffer G Card, Nathan J Lachowsky, Heather L Armstrong, Zishan Cui, Lu Wang, Paul Sereda, Jody Jollimore, Thomas L Patterson, Trevor Corneil, Robert S Hogg, Eric A Roth, David M Moore
INTRODUCTION: Among gay, bisexual, and other men who have sex with men (GBM), collinearity between polysubstance use and mental health concerns has obscured their combined effects on HIV risk with multivariable results often highlighting only one or the other. METHODS: We used mediation and moderation analyses to examine the effects of polysubstance use and depressive symptoms on high-risk sex (i.e., condomless anal sex with serodiscordant/unknown status partner) in a sample of sexually-active GBM, aged ≥16 years, recruited in Metro Vancouver using respondent driven sampling...
March 6, 2018: Addictive Behaviors
Cary L Klemmer, Sean Arayasirikul, Henry F Raymond
Psychological processes may mediate the relationship between minority stress and mental health though limited data exist showing this pathway among trans women. Trans women's degree of satisfaction with their body is associated with mental health outcomes. This study used a model of minority stress to explore for indirect effects on the association between transphobia-based victimization and anxiety and depression through one's degree of body satisfaction. Analysis also explored for racial differences. Transgender women ( N = 233) were recruited in 2013 using respondent-driven sampling...
March 1, 2018: Journal of Interpersonal Violence
Susan G Sherman, Marisa Hast, Ju Nyeong Park, Michele R Decker, Colin Flynn, Danielle German
Sex exchange is associated with HIV and other morbidities yet has received little research, surveillance, and programmatic attention in the U.S. This study identified correlates of exchange sex and among low-income women in Baltimore, Maryland. Participants were recruited into the National HIV Behavioral Surveillance (NHBS) system in 2013 using respondent driven sampling (RDS) and completed a survey and HIV testing. The analytic sample (n = 253) consisted of women aged ≥18 years who had recent (past year) heterosexual sex...
March 8, 2018: AIDS Care
Anneli Uusküla, Mait Raag, Sigrid Vorobjov, Don Des Jarlais
BACKGROUND: Despite increasing contraceptive availability, unintended pregnancy remains a global problem. Developing strategies to reverse this trend and increasing occurrence of withdrawal syndrome among newborn children of females currently injecting drugs warrants special attention. The knowledge base on the uptake of effective contraception among females who inject drugs (FWID) is scant. We aimed to examine the prevalence of and factors associated with the use of non-condom contraceptives among sexually active FWID with the focus on effective contraception...
March 5, 2018: Harm Reduction Journal
Carolina Alcala-Alezones, Theo G M Sandfort, Stephanie Serafino, Vasu Reddy
The label "men who have sex with men" (MSM) is used to categorize a diverse population exclusively on the basis of its sexual behavior. Understanding the diversity that this label comprises is critical for the development of health interventions that effectively reach the various populations subsumed under this label. In this cross-sectional study of South African MSM (N = 480) recruited through respondent-driven sampling (RDS), we explored differences between men who had sex with both men and women (MSMW) and men who had sex with men exclusively (MSME)...
March 5, 2018: Journal of Sex Research
Ashley Grosso, Shianne Busch, Tampose Mothopeng, Stephanie Sweitzer, John Nkonyana, Nkomile Mpooa, Noah Taruberekera, Stefan Baral
INTRODUCTION: Sustainable Development Goals (SDGs) about gender equality; decent work; and peace, justice, and strong institutions include a focus on eradicating trafficking and sexual exploitation of and violence against women and children. In Lesotho, 86% of women have experienced gender-based violence. In addition, overall HIV prevalence is among the highest globally, and higher among adolescent girls than boys. Moreover, nearly three quarters of female sex workers (FSW) are estimated to be living with HIV in Lesotho...
February 2018: Journal of the International AIDS Society
Jenna Jerman, Tsuyoshi Onda, Rachel K Jones
OBJECTIVE: To examine the motivations and circumstances of individuals seeking information about self-abortion on the Internet. STUDY DESIGN: We identified 26 terms that we anticipated someone might use to find information about self-abortion on the internet. Users who entered these terms into the Google search engine were provided with a link to our survey via Google AdWords. We fielded the survey over a 32-day period; users were eligible if accessing the survey from a U...
February 22, 2018: Contraception
Samantha R Lattof
People working in Ghana's informal sector have low rates of enrolment in the publicly funded National Health Insurance Scheme. Informal sector workers, including migrant girls and women from northern Ghana working as head porters (kayayei), report challenges obtaining insurance and seeking formal health care. This article analyses how health insurance status affects kayayei migrants' care-seeking behaviours. This mixed-methods study involved surveying 625 migrants using respondent-driven sampling and conducting in-depth interviews with a sub-sample of 48 migrants...
February 15, 2018: Health Policy and Planning
Robin Chatters, Louise Newbould, Kirsty Sprange, Daniel Hind, Gail Mountain, Katy Shortland, Lauren Powell, Rebecca Gossage-Worrall, Tim Chater, Anju Keetharuth, Ellen Lee, Bob Woods
BACKGROUND: Recruiting isolated older adults to clinical trials is complex, time-consuming and difficult. Previous studies have suggested querying existing databases to identify appropriate potential participants. We aim to compare recruitment techniques (general practitioner (GP) mail-outs, community engagement and clinician referrals) used in three randomised controlled trial (RCT) studies assessing the feasibility or effectiveness of two preventative interventions in isolated older adults (the Lifestyle Matters and Putting Life In Years interventions)...
February 20, 2018: Trials
April M Young, Abby E Rudolph, Jennifer R Havens
PURPOSE OF REVIEW: The purpose of this paper is to provide a thorough overview of methods used for recruitment, network data collection, and network data management in a network-based study of rural people who use drugs (PWUD) and to offer methodological recommendations for future research on rural drug use. RECENT FINDINGS: The Social Networks among Appalachian People (SNAP) study recruited a cohort of 503 rural PWUD via respondent-driven sampling (RDS) and has retained more than 80% of eligible participants over 7-9 years...
February 19, 2018: Current HIV/AIDS Reports
Jennifer Guida, Liangyuan Hu, Hongjie Liu
Female sex workers (FSWs) often engage in concurrent partnerships, meaning they have multiple sexual relationships at the same time. The objective of this study was to investigate sexual concurrency and its associations with condom use and syphilitic infections among FSWs over age 35. Respondent-driven sampling was used to recruit 1,245 FSWs in Nanning, Hefei, and Qingdao, China. FSWs were asked to report whether they had concurrent partners in the past six months. Concurrency was defined as engagement in sex with commercial clients and (1) husbands and boyfriends (n = 167); (2) husbands only (n = 301); or (3) boyfriends only (n = 469)...
February 16, 2018: Journal of Sex Research
Stephanie T Child, Katrina M Walsemann, Andrew T Kaczynski, Nancy L Fleischer, Alexander C McLain, Spencer Moore
Background: Personal (i.e. egocentric) network characteristics are associated with health outcomes, including overweight and obesity. Previous research suggests educational attainment may interact with network characteristics to buffer these relationships. Limited research has examined the personal network characteristics of Black Americans, who have increased risk of overweight and obesity. The purpose of the current study was to examine associations between network characteristics and body mass index (BMI), and whether educational attainment modified these associations among Black Americans...
February 13, 2018: Journal of Public Health
Kayo Fujimoto, Charlene A Flash, Lisa M Kuhns, Ju-Yeong Kim, John A Schneider
OBJECTIVES: Syphilis and HIV epidemics overlap, yet little is known about combined network and behavioural factors that drive syphilis-HIV coinfection. Our study objective was to assess network contexts and sexual behaviours associated with syphilis-HIV co-infection and monoinfection among a particularly vulnerable subgroup: young Black men who have sex with men (YBMSM). To achieve this objective, we examined factors associated with coinfection by each subgroup as classified by syphilis-HIV infection status: (A) HIV monoinfected, (B) syphilis monoinfected and (C) neither syphilis infected nor HIV infected...
February 9, 2018: Sexually Transmitted Infections
Don Des Jarlais, Pham Minh Khue, Jonathan Feelemyer, Kamyar Arasteh, Duong Thi Huong, Khuat Thi Hai Oanh, Hoang Thi Giang, Nham Thi Tuyet Thanh, Vu Hai Vinh, Douglas D Heckathorn, Jean Pierre Moles, Roselyne Vallo, Catherine Quillet, Delphine Rapoud, Laurent Michel, Didier Laureillard, Ted Hammett, Nicolas Nagot
BACKGROUND: Good estimates of key population sizes are critical for appropriating resources to prevent HIV infection. We conducted two capture/recapture studies to estimate the number of PWID currently in Hai Phong, Vietnam. METHODS: A 2014 respondent-driven sampling (RDS) survey served as one capture, and distribution of cigarette lighters at drug use "hotspots" in 2016 served as another "capture." A 2016 survey using RDS, conducted 1 week after lighter distribution, served as "recapture" for both captures...
February 2, 2018: Drug and Alcohol Dependence
Andrew W Manigault, Alex Woody, Peggy M Zoccola, Sally S Dickerson
BACKGROUND: Mindfulness, or the practice of observing present moment experiences with acceptance, is thought to improve health at least partially by limiting hypothalamic-pituitary-adrenal (HPA) axis over-responsiveness during episodes of acute stress. However, models of allostatic load suggest that HPA axis under-responsiveness can also be detrimental to health, and the relationship between mindfulness and cortisol under-responsiveness has yet to be examined. The present study therefore aimed to address this knowledge gap, and to revisit the relationship between mindfulness and acute cortisol response magnitude while excluding (or statistically controlling for) individuals displaying HPA axis under-responsiveness...
January 31, 2018: Psychoneuroendocrinology
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