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Respondent driven sampling

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https://www.readbyqxmd.com/read/28108879/patterns-of-social-affiliations-and-healthcare-engagement-among-young-black-men-who-have-sex-with-men
#1
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
#2
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
#3
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
#4
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
#5
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
https://www.readbyqxmd.com/read/28025737/substance-use-and-sexual-risk-behavior-among-black-south-african-men-who-have-sex-with-men-the-moderating-effects-of-reasons-for-drinking-and-safer-sex-intentions
#6
Justin Knox, Vasu Reddy, Tim Lane, Deborah Hasin, Theo Sandfort
Research studies suggest an association between substance use and sexual risk behavior, but are not completely consistent. The moderating effects of other psychosocial factors might help explain these inconsistencies. The current study therefore assessed whether substance use is associated with sexual risk behavior, and whether this relationship is modified by expectancies about the effects of alcohol, reasons for consuming alcohol, or intentions to engage in safe sex. A cross-sectional survey was conducted among 480 black South African men who have sex with men recruited using respondent-driven sampling...
December 26, 2016: AIDS and Behavior
https://www.readbyqxmd.com/read/28008544/the-where-and-how-for-reaching-transgender-women-and-men-who-have-sex-with-men-with-hiv-prevention-services-in-guatemala
#7
William M Miller, William C Miller, Clare Barrington, Sharon S Weir, Sanny Y Chen, Michael E Emch, Audrey E Pettifor, Gabriela Paz-Bailey
This study aims to describe the transgender women and men who have sex with men (MSM) missed through venue-based sampling and illustrate how data on venues can be used to prioritize service delivery. Respondent-driven sampling (RDS) and time-location sampling (TLS) were used concurrently in 2010 for behavioral surveillance among MSM and transgender women in Guatemala City. RDS recruits who did not frequent venues (n = 106) were compared to TLS recruits (n = 609). TLS participants recruited at different types of venues were compared...
December 22, 2016: AIDS and Behavior
https://www.readbyqxmd.com/read/27998178/overlapping-hiv-and-sex-work-stigma-among-female-sex-workers-recruited-to-14-respondent-driven-sampling-surveys-across-zimbabwe-2013
#8
J R Hargreaves, J Busza, P Mushati, E Fearon, F M Cowan
HIV stigma can inhibit uptake of HIV testing and antiretroviral therapy as well as negatively affect mental health. Efforts to reduce discrimination against people living with HIV (LWH) have contributed to greater acceptance of the infection. Female sex workers (FSW) LWH may experience overlapping stigma due to both their work and HIV status, although this is poorly understood. We examined HIV and sex-work stigma experienced by FSW LWH in Zimbabwe. Using the SAPPH-IRe cluster-randomised trial baseline survey, we analysed the data from 1039 FSW self-reporting HIV...
December 21, 2016: AIDS Care
https://www.readbyqxmd.com/read/27990581/reproducibility-of-respondent-driven-sampling-rds-in-repeat-surveys-of-men-who-have-sex-with-men-unguja-zanzibar
#9
Ahmed Khatib, Shaaban Haji, Maryam Khamis, Christen Said, Farhat Khalid, Mohammed Dahoma, Ameir Ali, Asha Othman, Susie Welty, Willi McFarland
To assess the reproducibility of respondent-driven sampling (RDS) in obtaining comparable samples across two survey rounds, we conducted integrated bio-behavioral surveillance surveys (IBBSS) using RDS in 2007 and 2011 among men who have sex with men (MSM) on Unguja island in Zanzibar. Differences in the two rounds were assessed by comparing RDS-adjusted population estimates, stratified estimates, and bottleneck plots. Participants in the 2011 survey round were younger (31.4 vs. 9.9% under 19 years old, p < 0...
December 19, 2016: AIDS and Behavior
https://www.readbyqxmd.com/read/27984553/prevalence-and-predictors-of-human-immunodeficiency-virus-and-selected-sexually-transmitted-infections-among-people-who-inject-drugs-in-dar-es-salaam-tanzania-a-new-focus-to-get-to-zero
#10
Elia John Mmbaga, Kåre Moen, Neema Makyao, Melkizedeck Leshabari
BACKGROUND: Previous studies in Tanzania indicated that human immunodeficiency virus (HIV) prevalence among people who inject drugs (PWIDs) could be as high as 40%. We aim to provide data on the prevalence of HIV and sexually transmitted infection among PWIDs to inform national plans to get to zero. MATERIALS AND METHODS: Respondent-driven sampling was used to collect drug use, and sexual practices data among PWIDs aged 15 years and older. Blood samples were examined for HIV, herpes simplex virus type 2, syphilis, and hepatitis B...
December 14, 2016: Sexually Transmitted Diseases
https://www.readbyqxmd.com/read/27977387/exploring-the-role-of-sex-seeking-apps-and-websites-in-the-social-and-sexual-lives-of-gay-bisexual-and-other-men-who-have-sex-with-men-a-cross-sectional-study
#11
Kiffer G Card, Nathan J Lachowsky, Zishan Cui, Susan Shurgold, Maya Gislason, Jamie I Forrest, Ashleigh J Rich, David Moore, Eric Roth, Robert S Hogg
Background: The objective of this study was to explore the relationship between online sex-seeking, community/social attachment and sexual behaviour. Methods: Respondent-driven sampling was used to recruit 774 sexually active gay and bisexual men in Vancouver, Canada, aged ≥16 years. Multivariable logistic regression compared men who had used online sex-seeking apps/websites in the past 6 months (n=586) with those who did not (n=188). Results: Multivariable results showed that online sex seekers were more likely to be younger [adjusted odds ratio (aOR)=0...
December 16, 2016: Sexual Health
https://www.readbyqxmd.com/read/27931519/high-prevalence-of-hiv-chlamydia-and-gonorrhoea-among-men-who-have-sex-with-men-and-transgender-women-attending-trusted-community-centres-in-abuja-and-lagos-nigeria
#12
Babajide Keshinro, Trevor A Crowell, Rebecca G Nowak, Sylvia Adebajo, Sheila Peel, Charlotte A Gaydos, Cristina Rodriguez-Hart, Stefan D Baral, Melissa J Walsh, Ogbonnaya S Njoku, Sunday Odeyemi, Teclaire Ngo-Ndomb, William A Blattner, Merlin L Robb, Manhattan E Charurat, Julie Ake
INTRODUCTION: Sexually transmitted infection (STI) and HIV prevalence have been reported to be higher amongst men who have sex with men (MSM) in Nigeria than in the general population. The objective of this study was to characterize the prevalence of HIV, chlamydia and gonorrhoea in this population using laboratory-based universal testing. METHODS: TRUST/RV368 represents a cohort of MSM and transgender women (TGW) recruited at trusted community centres in Abuja and Lagos, Nigeria, using respondent-driven sampling (RDS)...
2016: Journal of the International AIDS Society
https://www.readbyqxmd.com/read/27930599/the-hiv-care-cascade-among-female-sex-workers-in-zimbabwe-results-of-a-population-based-survey-from-the-sisters-antiretroviral-therapy-programme-for-prevention-of-hiv-an-integrated-response-sapph-ire-trial
#13
Frances M Cowan, Calum Davey, Elizabeth Fearon, Phillis Mushati, Jeffrey Dirawo, Valentina Cambiano, Sue Napierala Mavedzenge, Dagmar Hanisch, Ramona Wong-Gruenwald, Milton Chemhuru, Nyasha Masuka, Karin Hatzold, Owen Mugurungi, Joanna Busza, Andrew Phillips, James R Hargreaves
INTRODUCTION: Female sex workers (FSW) in sub-Saharan Africa have a higher prevalence of HIV than other women of reproductive age. Social, legal, and structural barriers influence their access to care. Little is known about the HIV diagnosis and care cascade in most countries in southern Africa. We aimed to describe the HIV diagnosis and care cascade among FSW in Zimbabwe. METHODS: We conducted cross-sectional respondent driven sampling (RDS) surveys of FSW in 14 sites across Zimbabwe as the baseline for a cluster-randomised controlled trial investigating a combination HIV prevention and care package...
December 1, 2016: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/27930328/estimating-uncertainty-in-respondent-driven-sampling-using-a-tree-bootstrap-method
#14
Aaron J Baraff, Tyler H McCormick, Adrian E Raftery
Respondent-driven sampling (RDS) is a network-based form of chain-referral sampling used to estimate attributes of populations that are difficult to access using standard survey tools. Although it has grown quickly in popularity since its introduction, the statistical properties of RDS estimates remain elusive. In particular, the sampling variability of these estimates has been shown to be much higher than previously acknowledged, and even methods designed to account for RDS result in misleadingly narrow confidence intervals...
December 20, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27925776/providers-and-administrators-perceptions-of-complementary-and-integrative-health-practices-across-the-veterans-health-administration
#15
Carol E Fletcher, Allison R Mitchinson, Erika Trumble, Daniel B Hinshaw, Jeffery A Dusek
OBJECTIVES: Use of complementary and integrative health (CIH) therapies is being promoted by the Veterans Health Administration (VA), but promotion may not equate to adoption. The purpose of this study was to explore whether perceptions regarding CIH at one VA medical center (VAMC) were similar to perceptions from a sample of other VAMCs. DESIGN: This article reports a subset of qualitative findings from a mixed-methods study. SETTING/PARTICIPANTS: Sites were recruited through a VA-wide CIH listserver...
January 2017: Journal of Alternative and Complementary Medicine: Research on Paradigm, Practice, and Policy
https://www.readbyqxmd.com/read/27919289/correlates-of-sex-trading-among-male-non-injecting-drug-users-in-myanmar-a-cross-sectional-study
#16
Yu Mon Saw, Thu Nandar Saw, Kyi Mar Wai, Krishna C Poudel, Hla Hla Win
BACKGROUND: Sex trading is a recognized risk factor for human immune deficiency virus infection and other sexually transmitted infections among non-injecting drug users (NIDUs). However, very little research has addressed the factors associated with sex trading among male NIDUs in Myanmar. METHODS: A cross-sectional study was conducted from January to February 2010 using the respondent-driven sampling method. In total, 210 NIDUs aged between 18 and 49 years, with no history of injecting drug use, and who used non-injected illicit drugs in the last 6 months were recruited...
December 5, 2016: Harm Reduction Journal
https://www.readbyqxmd.com/read/27913795/prevalence-of-sti-symptoms-and-high-levels-of-stigma-in-sti-healthcare-among-men-who-have-sex-with-men-in-dar-es-salaam-tanzania-a-respondent-driven-sampling-study
#17
Michael W Ross, Markus Larsson, Joyce E Nyoni, Anette Agardh
Symptoms of sexually transmitted infections (STIs), whether they are presented for treatment or diagnosis, and how they are received by the clinician where they are presented, may be concomitants of stigma associated with homosexuality in homophobic climates. We analyzed respondent-driven sampling data from a study on 200 young men who have sex with men (MSM) in Dar es Salaam, Tanzania to examine sample prevalence, treatment and clinician response to 10 symptoms potentially associated with STIs. Survey measures included 10 self-reported STI symptoms, further specified according to location (genital, anal, oral), further specified according to place of diagnosis, place of, treatment whether there was pharmacy treatment or self-medication, healthcare worker (HCW) inquiries about source of infection and whether the HCW was polite...
December 2, 2016: International Journal of STD & AIDS
https://www.readbyqxmd.com/read/27911038/quantitating-the-cell-turning-images-into-numbers-with-imagej
#18
REVIEW
Ellen T Arena, Curtis T Rueden, Mark C Hiner, Shulei Wang, Ming Yuan, Kevin W Eliceiri
Modern biological research particularly in the fields of developmental and cell biology has been transformed by the rapid evolution of the light microscope. The light microscope, long a mainstay of the experimental biologist, is now used for a wide array of biological experimental scenarios and sample types. Much of the great developments in advanced biological imaging have been driven by the digital imaging revolution with powerful processors and algorithms. In particular, this combination of advanced imaging and computational analysis has resulted in the drive of the modern biologist to not only visually inspect dynamic phenomena, but to quantify the involved processes...
December 2, 2016: Wiley Interdisciplinary Reviews. Developmental Biology
https://www.readbyqxmd.com/read/27896553/associations-of-hiv-testing-sexual-risk-and-access-to-prevention-among-female-sex-workers-in-the-dominican-republic
#19
Lisa G Johnston, Luis Bonilla, Tessie Caballero, Martha Rodriguez, Yordana Dolores, Miguel Angel de la Rosa, Annie Malla, Janet Burnett, Víctor Terrero, Sam Martinez, Oliver Morgan
The Caribbean region has one of the highest proportions of HIV in the general female population attributable to sex work. In 2008 (n = 1256) and 2012 (n = 1525) in the Dominican Republic, HIV biological and behavioral surveys were conducted among female sex workers (FSW) in four provinces using respondent driven sampling. Participants were ≥15 years who engaged in intercourse in exchange for money in the past 6 months and living/working in the study province. There were no statistically significant changes in HIV and other infections prevalence from 2008 to 2012, despite ongoing risky sexual practices...
November 28, 2016: AIDS and Behavior
https://www.readbyqxmd.com/read/27888205/engagement-in-the-hiv-care-cascade-and-barriers-to-antiretroviral-therapy-uptake-among-female-sex-workers-in-port-elizabeth-south-africa-findings-from-a-respondent-driven-sampling-study
#20
Sheree Schwartz, Andrew Lambert, Nancy Phaswana-Mafuya, Zamakayise Kose, Mfezi Mcingana, Claire Holland, Sosthenes Ketende, Clarence Yah, Stephanie Sweitzer, Harry Hausler, Stefan Baral
BACKGROUND: Female sex workers (FSWs) are disproportionately affected by HIV, even in the context of broadly generalised HIV epidemics such as South Africa. This has been observed in spite of the individual and population-level benefits of HIV treatment. We characterise the HIV care cascade among FSWs and relationships with antiretroviral therapy (ART) use. METHODS: FSWs ≥18 years were recruited through respondent-driven sampling into a cross-sectional study in Port Elizabeth, South Africa...
November 25, 2016: Sexually Transmitted Infections
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