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Respondent driven sampling

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https://www.readbyqxmd.com/read/29789260/respondent-driven-sampling-in-a-biomonitoring-study-of-refugees-from-burma-in-buffalo-new-york-who-eat-great-lakes-fish
#1
Ming Liu, Molly McCann, Elizabeth Lewis-Michl, Syni-An Hwang
BACKGROUND: Refugees from Burma who consume fish caught from local waterbodies have increased risk of exposure to environmental contaminants. We used respondent driven sampling (RDS) to sample this hard-to-reach population for the first Biomonitoring of Great Lakes Populations program. In the current study, we examined the interview data and assessed the effectiveness of RDS to sample the unique population. METHODS: In 2013, we used RDS to sample 205 Burmese refugees and immigrants residing in Buffalo, New York who consumed fish caught from Great Lakes waters...
April 30, 2018: International Journal of Hygiene and Environmental Health
https://www.readbyqxmd.com/read/29781881/individual-and-network-factors-associated-with-hiv-care-continuum-outcomes-among-nigerian-msm-accessing-healthcare-services
#2
Habib O Ramadhani, Nicaise Ndembi, Rebecca G Nowak, Uchenna Ononaku, Jerry Gwamna, Ifeanyi Orazulike, Sylvia Adebajo, Trevor A Crowell, Hongjie Liu, Stefan D Baral, Julie Ake, Man E Charurat
BACKGROUND: and setting: As data on the determinants of the HIV care continuum from key populations such as men who have sex with men (MSM) in resource-limited, settings (RLS) are limited, the study aimed to characterize HIV care continuum outcomes and assess individual and network barriers to progression through the HIV care continuum among MSM in Abuja and Lagos, Nigeria. METHODS: TRUST/RV368 study used respondent-driven-sampling to accrue MSM into community-based clinics in Nigeria...
May 16, 2018: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/29768553/high-risk-behaviors-for-hepatitis-b-and-c-infections-among-female-sex-workers
#3
Marco Antonio Moreira Puga, Larissa Melo Bandeira, Sabrina Moreira Dos Santos Weis, Fernanda Rodas Pires Fernandes, Lisie Souza Castro, Tayana Serpa Ortiz Tanaka, Grazielli Rocha de Rezende, Sheila Araújo Teles, Vivianne de Oliveira Landgraf de Castro, Paula Guerra Murat, Gina Jonasson Mousquer Capelin, Ana Rita Coimbra Motta-Castro
INTRODUCTION: The prevalence of hepatitis B and hepatitis C and risk behaviors among 402 female sex workers in Central Brazil were investigated by respondent-driven sampling. METHODS: Blood samples were tested for hepatitis B and C markers by enzyme-linked immunosorbent assay. Two hepatitis B vaccination schedules were performed. RESULTS: The prevalence of hepatitis B and C infections were 9.3% and 0.5%, respectively. Susceptibility to hepatitis B infection was observed in 61...
March 2018: Revista da Sociedade Brasileira de Medicina Tropical
https://www.readbyqxmd.com/read/29754028/frequency-and-factors-associated-with-providing-injection-initiation-assistance-in-tallinn-estonia
#4
Anneli Uusküla, David M Barnes, Mait Raag, Ave Talu, Susan Tross, Don C Des Jarlais
Injection drug use is expanding in numerous regions in the world. Persons who inject drugs (PWID) play an important role encouraging new persons into injecting, by providing injection initiation assistance ("assisting" behaviors) and stimulating interest in injection ("promoting" behaviors). OBJECTIVES: To describe the prevalence of assisting and promoting behaviors, and to identify factors associated with assisting, among PWID in Tallinn, Estonia. METHODS: In 2016, PWID were recruited through respondent-driven sampling (RDS), interviewed, and HIV tested...
May 8, 2018: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/29752836/effect-of-a-diagonal-intervention-on-uptake-of-hiv-and-reproductive-health-services-by-female-sex-workers-in-three-sub-saharan-african-cities
#5
Yves Lafort, Letitia Greener, Faustino Lessitala, Sophie Chabeda, Ross Greener, Mags Beksinska, Peter Gichangi, Sally Griffin, Jenni A Smit, Matthew Chersich, Wim Delva
OBJECTIVES: To enhance uptake of sexual and reproductive health (SRH) services by female sex workers (FSWs), we conducted an implementation study in which we piloted and tested context-specific 'diagonal' interventions, combining vertical, targeted interventions with horizontally improved access to the general health services, in three cities in sub-Saharan Africa. METHODS: We collected indicators of SRH service uptake through face-to-face interviews with approximately 400 FSWs, pre- and post-intervention, in Durban, South Africa; Tete, Mozambique; and Mombasa, Kenya, recruited by respondent-driven sampling...
May 12, 2018: Tropical Medicine & International Health: TM & IH
https://www.readbyqxmd.com/read/29747875/young-adults-opioid-use-trajectories-from-nonmedical-prescription-opioid-use-to-heroin-drug-injection-drug-treatment-and-overdose
#6
Honoria Guarino, Pedro Mateu-Gelabert, Jennifer Teubl, Elizabeth Goodbody
INTRODUCTION: Recent research has begun to explore the transition from nonmedical use of prescription opioids (POs) to heroin and injection drug use, adding to earlier literature identifying factors that influence the transition from intranasal to injection use of heroin. However, little research has explored how these transitions are embedded within young people's broader opioid use trajectories - individual pathways that may also include experiences of nonfatal overdose and drug treatment...
May 1, 2018: Addictive Behaviors
https://www.readbyqxmd.com/read/29731528/seasonal-variations-of-the-sea-surface-microlayer-at-the-boknis-eck-times-series-station-baltic-sea
#7
Alexander Dreshchinskii, Anja Engel
The sea surface microlayer (SML) is the uppermost layer of the water column that links the ocean and atmosphere. It accumulates a variety of biogenic surface-active and buoyant substances, including gelatinous material, such as transparent exopolymer particles (TEP) and Coomassie stainable particles (CSP), potentially affecting air-sea exchange processes. Here, we studied the influence of the annual cycle of phytoplankton production on organic matter (OM) accumulation in the SML relative to the subsurface water (SSW)...
November 2017: Journal of Plankton Research
https://www.readbyqxmd.com/read/29730586/overlap-between-harm-reduction-and-hiv-service-utilisation-among-pwid-in-india-implications-for-hiv-combination-prevention
#8
M Kumi Smith, Sunil S Solomon, Derek A T Cummings, Aylur K Srikrishnan, M Suresh Kumar, C K Vasudevan, Allison M McFall, Gregory M Lucas, David D Celentano, Shruti H Mehta
BACKGROUND: In some regions, HIV incidence is rising among people who inject drugs (PWID). Combination prevention approaches are well suited to PWID who face multiple sources of HIV risk. This analysis investigates patterns of utilisation to basic HIV services (HIV counselling and testing [HCT], antiretroviral therapy [ART]) as well as harm reduction programs (needle and syringe exchange programs [NSEP] and opioid agonist therapy [OAT]) among PWID and how utilisation of harm reduction services is associated with HIV-related care seeking behaviours...
May 3, 2018: International Journal on Drug Policy
https://www.readbyqxmd.com/read/29708084/age-bias-in-survey-sampling-and-implications-for-estimating-hiv-prevalence-in-men-who-have-sex-with-men-insights-from-mathematical-modelling
#9
L F Johnson, P Mulongeni, A Marr, T Lane
Respondent-driven sampling (RDS) is widely used to estimate HIV prevalence in men who have sex with men (MSM). Mathematical models that are calibrated to these data may be compromised if they fail to account for selection biases in RDS surveys. To quantify the potential extent of this bias, an agent-based model of HIV in South Africa was calibrated to HIV prevalence and sexual behaviour data from South African studies of MSM, first reweighting the modelled MSM population to match the younger age profile of the RDS surveys (age-adjusted analysis) and then without reweighting (unadjusted analysis)...
April 30, 2018: Epidemiology and Infection
https://www.readbyqxmd.com/read/29707384/human-immunodeficiency-virus-infection-predictors-and-genetic-diversity-of-hepatitis-b-virus-and-hepatitis-c-virus-co-infections-among-drug-users-in-three-major-kenyan-cities
#10
Micah Oyaro, John Wylie, Chien-Yu Chen, Raphael O Ondondo, Anna Kramvis
Background: Drug users act as reservoirs and transmission channels for hepatitis B virus (HBV), hepatitis C virus (HCV) and human immunodeficiency virus (HIV) infections to the general population worldwide. Periodic epidemiological studies to monitor the prevalence and genetic diversity of these infections to inform on interventions are limited. Objective of the study: The objective of this study was to determine the predictors of HIV infection and genetic diversity of HBV and HCV among drug users in Kenya...
2018: Southern African Journal of HIV Medicine
https://www.readbyqxmd.com/read/29702681/knowledge-of-hepatitis-c-status-moderates-the-relationship-between-history-of-drug-treatment-and-sterile-syringe-use
#11
Kiva Ariani Fisher, Laura Michele Cahill, Stephanie Broyles, Marion Rorke, William Thomas Robinson
High-risk injection related behavior including use of non-sterile syringes is associated with negative health outcomes among people who inject drugs (PWID). Drug treatment programs have been reported to curb hepatitis C (HCV) transmission. This study aims to assess the role of drug treatment programs and knowledge of HCV status, and how they influence current injection-related risk. Data were collected in 2012 by the New Orleans arm of the CDC funded National HIV Behavioral Surveillance. Respondent driven sampling was used to recruit a sample of PWID...
2018: PloS One
https://www.readbyqxmd.com/read/29698493/one-step-estimation-of-networked-population-size-respondent-driven-capture-recapture-with-anonymity
#12
Bilal Khan, Hsuan-Wei Lee, Ian Fellows, Kirk Dombrowski
Size estimation is particularly important for populations whose members experience disproportionate health issues or pose elevated health risks to the ambient social structures in which they are embedded. Efforts to derive size estimates are often frustrated when the population is hidden or hard-to-reach in ways that preclude conventional survey strategies, as is the case when social stigma is associated with group membership or when group members are involved in illegal activities. This paper extends prior research on the problem of network population size estimation, building on established survey/sampling methodologies commonly used with hard-to-reach groups...
2018: PloS One
https://www.readbyqxmd.com/read/29694597/-pregnancy-and-abortion-experience-among-children-adolescents-and-youths-living-on-the-streets
#13
Lucas Neiva-Silva, Lauro Miranda Demenech, Laísa Rodrigues Moreira, Adriano Trassantes Oliveira, Fernanda Torres de Carvalho, Simone Dos Santos Paludo
The aim of this study is to identify the prevalence of pregnancy and abortion experience, along with associated factors among street children, adolescents and youths in Porto Alegre and Rio Grande, RS, Brazil. The sampling method in this cross-sectional study was Respondent-Driven Sampling (RDS), innovative in research about hidden populations. Interviews were conducted with 307 subjects, aged 10 to 21 years. In multivariate analysis, Poisson regression with a robust error variance was used. Most of this sample were males, with no contact with school and family...
April 2018: Ciência & Saúde Coletiva
https://www.readbyqxmd.com/read/29679462/impact-of-urbanization-on-abundance-and-phenology-of-caterpillars-and-consequences-for-breeding-in-an-insectivorous-bird
#14
Gábor Seress, Tamás Hammer, Veronika Bókony, Ernő Vincze, Bálint Preiszner, Ivett Pipoly, Csenge Sinkovics, Karl L Evans, András Liker
Urbanization can have marked effects on plant and animal populations' phenology, population size, predator-prey interactions and reproductive success. These aspects are rarely studied simultaneously in a single system, and some are rarely investigated, e.g. how insect phenology responds to urban development. Here, we study a tri-trophic system of trees - phytophagous insects (caterpillars) - insectivorous birds (great tits) to assess how urbanization influences i) the phenology of each component of this system, ii) insect abundance and iii) avian reproductive success...
April 20, 2018: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/29675946/plasma-proteomics-identifies-a-chemokine-storm-in-idiopathic-multicentric-castleman-disease
#15
Sheila K Pierson, Aaron J Stonestrom, Dustin Shilling, Jason Ruth, Christopher S Nabel, Amrit Singh, Yue Ren, Katie Stone, Hongzhe Li, Frits van Rhee, David C Fajgenbaum
Human Herpesvirus-8 (HHV-8)-negative/idiopathic multicentric Castleman disease (iMCD) is a poorly understood disease involving polyclonal lymphoproliferation with dysmorphic germinal centers, constitutional symptoms, and multi-organ failure. Patients can experience thrombocytopenia, anasarca, reticulin fibrosis, renal dysfunction, organomegaly, and normal immunoglobulin levels, - iMCD-TAFRO. Others experience thrombocytosis, milder effusions, and hypergammaglobulinemia, -iMCD-Not Otherwise Specified (iMCD-NOS)...
April 20, 2018: American Journal of Hematology
https://www.readbyqxmd.com/read/29674494/safety-and-efficacy-of-vorinostat-bortezomib-doxorubicin-and-dexamethasone-in-a-phase-i-ii-study-for-relapsed-or-refractory-multiple-myeloma-verumm-study-vorinostat-in-elderly-relapsed-and-unfit-multiple-myeloma
#16
Johannes M Waldschmidt, Alexander Keller, Gabriele Ihorst, Olga Grishina, Stefan Müller, Dagmar Wider, Anna V Frey, Kristina King, Roman Simon, Annette May, Pierfrancesco Tassone, Justus Duyster, Manfred Jung, Noopur Raje, Ralph Wäsch, Monika Engelhardt
This phase I/II trial was conducted to investigate the safety, efficacy, and pharmacodynamics of the pan-HDAC-inhibitor (HDACi) vorinostat combined with bortezomib, doxorubicin, and dexamethasone (VBDD) in patients suffering from relapsed/refractory multiple myeloma (RRMM). In the phase I part of this study, 9/33 patients received dose-escalated vorinostat (100, 200, 300mg), using a 4-day-on and 4-day-off schedule, and a standard 3+3 design. In the phase II part of the study, 24/33 patients were included to further assess VBDD's safety and efficacy...
April 19, 2018: Haematologica
https://www.readbyqxmd.com/read/29669570/health-care-seeking-patterns-for-female-genital-mutilation-cutting-among-young-somalis-in-norway
#17
Vivian N Mbanya, Abdi A Gele, Esperanza Diaz, Bernadette Kumar
BACKGROUND: Female genital mutilation/cutting (FGM/C) is a great concern, considering all the potential health implications. Use of health care services related to FGM/C by women who have been subjected to FGM/C in Norway remains to be understood. This study aims to explore the health care-seeking patterns for FGM/C-related health care problems, among young Somalis in Norway. METHODS: A cross-sectional study involving 325 young Somalis in Oslo was conducted in 2014 using respondent-driven sampling (RDS) technique...
April 18, 2018: BMC Public Health
https://www.readbyqxmd.com/read/29651193/using-new-technologies-for-time-diary-data-collection-instrument-design-and-data-quality-findings-from-a-mixed-mode-pilot-survey
#18
Stella Chatzitheochari, Kimberly Fisher, Emily Gilbert, Lisa Calderwood, Tom Huskinson, Andrew Cleary, Jonathan Gershuny
Recent years have witnessed a steady growth of time-use research, driven by the increased research and policy interest in population activity patterns and their associations with long-term outcomes. There is recent interest in moving beyond traditional paper-administered time diaries to use new technologies for data collection in order to reduce respondent burden and administration costs, and to improve data quality. This paper presents two novel diary instruments that were employed by a large-scale multi-disciplinary cohort study in order to obtain information on the time allocation of adolescents in the United Kingdom...
2018: Social Indicators Research
https://www.readbyqxmd.com/read/29629653/defining-and-surveying-key-populations-at-risk-of-hiv-infection-towards-a-unified-approach-to-eligibility-criteria-for-respondent-driven-sampling-hiv-biobehavioral-surveys
#19
Avi J Hakim, Lisa G Johnston, Samantha Dittrich, Dimitri Prybylski, Janet Burnett, Evelyn Kim
Substantial resources are invested in human immunodeficiency virus biobehavioral surveys using respondent-driven sampling for measuring progress towards the UNAIDS 90-90-90 goals and to obtain other essential data on key populations. Survey data are used to meet country needs as well those of development partners, whose data needs may sometimes diverge. Surveys using differing eligibility criteria impede comparisons across surveys. With scant literature and guidelines on how to approach eligibility criteria, diverse criteria are used within and across countries...
January 1, 2018: International Journal of STD & AIDS
https://www.readbyqxmd.com/read/29618496/cell-centred-meta-analysis-reveals-baseline-predictors-of-anti-tnf%C3%AE-non-response-in-biopsy-and-blood-of-patients-with-ibd
#20
Renaud Gaujoux, Elina Starosvetsky, Naama Maimon, Francesco Vallania, Haggai Bar-Yoseph, Sigal Pressman, Roni Weisshof, Idan Goren, Keren Rabinowitz, Matti Waterman, Henit Yanai, Iris Dotan, Edmond Sabo, Yehuda Chowers, Purvesh Khatri, Shai S Shen-Orr
OBJECTIVE: Although anti-tumour necrosis factor alpha (anti-TNFα) therapies represent a major breakthrough in IBD therapy, their cost-benefit ratio is hampered by an overall 30% non-response rate, adverse side effects and high costs. Thus, finding predictive biomarkers of non-response prior to commencing anti-TNFα therapy is of high value. DESIGN: We analysed publicly available whole-genome expression profiles of colon biopsies obtained from multiple cohorts of patients with IBD using a combined computational deconvolution-meta-analysis paradigm which allows to estimate immune cell contribution to the measured expression and capture differential regulatory programmes otherwise masked due to variation in cellular composition...
April 4, 2018: Gut
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