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Respondent driven sampling

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https://www.readbyqxmd.com/read/29344740/trends-in-awareness-and-use-of-hiv-prep-among-gay-bisexual-and-other-men-who-have-sex-with-men-in-vancouver-canada-2012-2016
#1
Terrance Mosley, Moliehi Khaketla, Heather L Armstrong, Zishan Cui, Paul Sereda, Nathan J Lachowsky, Mark W Hull, Gbolahan Olarewaju, Jody Jollimore, Joshua Edward, Julio S G Montaner, Robert S Hogg, Eric A Roth, David M Moore
Gay, bisexual, and other men who have sex with men (gbMSM) are at the highest risk for HIV infection in British Columbia (BC). Pre-exposure prophylaxis (PrEP) has been recently licensed but is currently not publicly funded in BC. Using respondent-driven sampling, we recruited a cohort of gbMSM to complete a computer-assisted self-interview with follow-up every 6 months. Stratified by HIV status, we examined trends in awareness of PrEP from 11/2012 to 02/2016 and factors associated with PrEP awareness. 732 participants responded to the PrEP awareness question...
January 17, 2018: AIDS and Behavior
https://www.readbyqxmd.com/read/29334478/authorship-correction-sampling-key-populations-for-hiv-surveillance-results-from-eight-cross-sectional-studies-using-respondent-driven-sampling-and-venue-based-snowball-sampling
#2
Amrita Rao, Shauna Stahlman, James Hargreaves, Sharon Weir, Jessie Edwards, Brian Rice, Duncan Kochelani, Mpumelelo Mavimbela, Stefan Baral
[This corrects the article DOI: 10.2196/publichealth.8116.].
January 15, 2018: JMIR Public Health and Surveillance
https://www.readbyqxmd.com/read/29331900/a-catalytic-and-dual-recycling-amplification-atp-sensor-based-on-target-driven-allosteric-structure-switching-of-aptamer-beacons
#3
Ying Peng, Daxiu Li, Ruo Yuan, Yun Xiang
Abnormal concentrations of ATP are associated with many diseases and cancers, and quantitative detection of ATP is thus of great importance for disease diagnosis and prognosis. In the present work, we report a new dual recycling amplification sensor integrated with catalytic hairpin assembly (CHA) to achieve high sensitivity for fluorescent detection of ATP. The association of the target ATP with the aptamer beacons causes the allosteric structure switching of the aptamer beacons to expose the toehold regions, which hybridize with and unfold the fluorescently quenched hairpin signal probes (HP1) to recycle the target ATP and to trigger CHA between HP1 and the secondary hairpin probes (HP2) to form HP1/HP2 duplexes...
January 9, 2018: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/29317582/health-and-life-satisfaction-for-chinese-gay-men-%C3%A2-in-guangzhou-china
#4
Yong Yu, Shuiyuan Xiao
To understand Chinese gay men's health and life satisfaction in Guanzhou, and to analyze the main factors for life satisfaction.
 Methods: Male gay participants were recruited through respondent-driven sampling and face-to-face investigations with self-administered questionnaires, including a general demographic questionnaire, a suicide questionnaire, the Depression-Anxiety Stress Scale, the Self-Stigma Scale, the Perceived Social Support Scale, the Rosenberg Self-Esteem Scale, and the Satisfaction with Life Scale...
December 28, 2017: Zhong Nan da Xue Xue Bao. Yi Xue Ban, Journal of Central South University. Medical Sciences
https://www.readbyqxmd.com/read/29306786/differences-in-risk-behaviours-and-hiv-status-between-primary-amphetamines-and-opioid-injectors-in-estonia-and-russia
#5
Isabel Tavitian-Exley, Mathieu Maheu-Giroux, Lucy Platt, Robert Heimer, Anneli Uusküla, Olga Levina, Peter Vickerman, Marie-Claude Boily
BACKGROUND AND OBJECTIVE: People who inject drugs (PWID) account for over half of new HIV infections in Eastern Europe and central Asia, where opioids continue to be the dominant illicit drugs injected. Stimulants including amphetamines (ATS) have been associated with HIV infection risk in several settings. We sought to examine whether primary ATS injection was associated with greater HIV risk, compared to opioid injection in two European locales with significant HIV epidemics. METHODS: PWID in Kohtla-Järve and St...
January 4, 2018: International Journal on Drug Policy
https://www.readbyqxmd.com/read/29304156/engaging-in-extreme-activism-in-support-of-others-political-struggles-the-role-of-politically-motivated-fusion-with-out-groups
#6
Jonas R Kunst, Beverly Boos, Sasha Y Kimel, Milan Obaidi, Maor Shani, Lotte Thomsen
Humans are a coalitional, parochial species. Yet, extreme actions of solidarity are sometimes taken for distant or unrelated groups. What motivates people to become solidary with groups to which they do not belong originally? Here, we demonstrate that such distant solidarity can occur when the perceived treatment of an out-group clashes with one's political beliefs (e.g., for Leftists, oppressive occupation of the out-group) and that it is driven by fusion (or a feeling of oneness) with distant others with whom one does not share any common social category such as nationality, ethnicity or religion...
2018: PloS One
https://www.readbyqxmd.com/read/29282272/our-health-counts-toronto-using-respondent-driven-sampling-to-unmask-census-undercounts-of-an-urban-indigenous-population-in-toronto-canada
#7
Michael A Rotondi, Patricia O'Campo, Kristen O'Brien, Michelle Firestone, Sara H Wolfe, Cheryllee Bourgeois, Janet K Smylie
OBJECTIVES: To provide evidence of the magnitude of census undercounts of 'hard-to-reach' subpopulations and to improve estimation of the size of the urban indigenous population in Toronto, Canada, using respondent-driven sampling (RDS). DESIGN: Respondent-driven sampling. SETTING: The study took place in the urban indigenous community in Toronto, Canada. Three locations within the city were used to recruit study participants. PARTICIPANTS: 908 adult participants (15+) who self-identified as indigenous (First Nation, Inuit or Métis) and lived in the city of Toronto...
December 26, 2017: BMJ Open
https://www.readbyqxmd.com/read/29259820/national-survey-of-ebola-related-knowledge-attitudes-and-practices-before-the-outbreak-peak-in-sierra-leone-august-2014
#8
Mohamed F Jalloh, Paul Sengeh, Roeland Monasch, Mohammad B Jalloh, Nickolas DeLuca, Meredith Dyson, Sheku Golfa, Yukiko Sakurai, Lansana Conteh, Samuel Sesay, Vance Brown, Wenshu Li, Jonathan Mermin, Rebecca Bunnell
Background: The 2014-2015 Ebola epidemic in West Africa was the largest ever to occur. In the early phases, little was known about public knowledge, attitudes and practices (KAP) relating to Ebola virus disease (Ebola). Data were needed to develop evidence-driven strategies to address gaps in knowledge and practice. Methods: In August 2014, we conducted interviews with 1413 randomly selected respondents from 9 out of 14 districts in Sierra Leone using multistage cluster sampling...
2017: BMJ Global Health
https://www.readbyqxmd.com/read/29248493/tnfaip3-a20-acts-as-master-switch-in-tnf%C3%AE-blockade-driven-il-17a-expression
#9
Paulo Cm Urbano, Raúl Aguirre-Gamboa, Angel Ashikov, Bennie van Heeswijk, Anja Krippner-Heidenreich, Henk Tijssen, Yang Li, Valderilio F Azevedo, Lisa Jt Smits, Frank Hoentjen, Irma Joosten, Hans Jpm Koenen
BACKGROUND: Anti-TNF inhibitors successfully improve life quality of patients suffering from inflammatory disease. Unfortunately, not all patients respond to anti-TNF therapy and some patients show paradoxical immune side-effects, which is poorly understood. Surprisingly, anti-TNF agents were shown to promote IL-17A production, with as yet unknown clinical implications. OBJECTIVE: To investigate the molecular mechanism underlying anti-TNF driven IL-17A expression and the clinical implications of this phenomenon...
December 14, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29244809/hiv-1-viraemia-and-drug-resistance-amongst-female-sex-workers-in-soweto-south-africa-a-cross-sectional-study
#10
Jenny Coetzee, Gillian Hunt, Maya Jaffer, Kennedy Otwombe, Lesley Scott, Asiashu Bongwe, Johanna Ledwaba, Sephonono Molema, Rachel Jewkes, Glenda E Gray
BACKGROUND: HIV drug resistance (HIVDR) poses a threat to future antiretroviral therapy success. Monitoring HIVDR patterns is of particular importance in populations such as sex workers (SWs), where documented HIV prevalence is between 34-89%, and in countries with limited therapeutic options. Currently in South Africa, there is a dearth in evidence and no ongoing surveillance of HIVDR amongst sex work populations. This study aims to describe the prevalence of HIVDR amongst a sample of female sex workers (FSWs) from Soweto, South Africa...
2017: PloS One
https://www.readbyqxmd.com/read/29220710/life-satisfaction-and-its-associated-factors-among-money-boys-in-china
#11
A Zhang, J Yan, G Yang, X Tan, X Wang, S Tan
OBJECTIVES: Money Boy (MB) is a unique term used in China referring to a specialized population of men who sell sex to other men. Life satisfaction can influence one's health-related behaviors. The aim of our study was to find out the situation of MBs' life satisfaction and its associated factors. STUDY DESIGN: A cross-sectional study among MBs was conducted between July and December 2013 in Hunan province, China. METHODS: Respondent-driven sampling method was used for recruitment, with the initial seven 'seeds' found from a gay dating website, and 234 participants were enrolled into the study...
December 5, 2017: Public Health
https://www.readbyqxmd.com/read/29216355/prevalence-of-and-risk-factors-for-anal-hpv-among-a-sample-of-predominantly-black-men-who-have-sex-with-men-in-houston-texas
#12
Alan G Nyitray, Kayo Fujimoto, Jing Zhao, Anna R Giuliano, John A Schneider, Lu-Yu Hwang
Introduction: Young men who have sex with men (MSM) are at increased risk for human papillomavirus (HPV)-associated disease as a result of HPV infection. Our objective was to characterize high-risk anal HPV prevalence, and factors associated with prevalence, among a group of young, primarily black, MSM in Houston, Texas. Background: Young MSM, aged 18-29 years, were recruited using a respondent-driven sampling method to study HIV/STD transmission and risk. The current analysis estimated HPV prevalence among 135 primarily young black MSM who engaged in peer recruitment chains and who self-collected anal exfoliated cells...
December 5, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/29212490/attitudes-towards-assisted-suicide-and-euthanasia-among-care-dependent-older-adults-50-in-austria-the-role-of-socio-demographics-religiosity-physical-illness-psychological-distress-and-social-isolation
#13
Erwin Stolz, Hannes Mayerl, Peter Gasser-Steiner, Wolfgang Freidl
BACKGROUND: Care-dependency constitutes an important issue with regard to the approval of end-of-life decisions, yet attitudes towards assisted suicide and euthanasia are understudied among care-dependent older adults. We assessed attitudes towards assisted suicide and euthanasia and tested empirical correlates, including socio-demographics, religiosity, physical illness, psychological distress and social isolation. METHODS: A nationwide cross-sectional survey among older care allowance recipients (50+) in private households in Austria was conducted in 2016...
December 7, 2017: BMC Medical Ethics
https://www.readbyqxmd.com/read/29211633/prevalence-and-patterns-of-victimization-and-polyvictimization-among-female-sex-workers-in-soweto-a-south-african-township-a-cross-sectional-respondent-driven-sampling-study
#14
J Coetzee, G E Gray, R Jewkes
BACKGROUND: Female sex workers (FSWs) are disproportionately affected by violence from multiple partner categories. This increases their vulnerability to HIV. OBJECTIVES: To describe patterns of violence and polyvictimization among female SWs in Soweto. METHODS: A respondent-driven sampling (RDS) recruitment methodology was used to enrol 508 Soweto-based FSWs using a survey instrument. Raw and RDS adjusted data were descriptively analysed, Spearman's correlation and chi2 test of association were used to show associations...
2017: Global Health Action
https://www.readbyqxmd.com/read/29200349/mortality-quadrupled-among-opioid-driven-hospitalizations-notably-within-lower-income-and-disabled-white-populations
#15
Zirui Song
Hospitals play an important role in caring for patients in the current opioid crisis, but data on the outcomes and composition of opioid-driven hospitalizations in the United States have been lacking. Nationally representative all-payer data for the period 1993-2014 from the National Inpatient Sample were used to compare the mortality rates and composition of hospitalizations with opioid-related primary diagnoses and those of hospitalizations for other drugs and for all other causes. Mortality among opioid-driven hospitalizations increased from 0...
December 2017: Health Affairs
https://www.readbyqxmd.com/read/29192368/are-anal-sex-roles-associated-with-preferences-for-pre-exposure-prophylaxis-administration-modalities-among-men-who-have-sex-with-men
#16
William C Goedel, John A Schneider, H Rhodes Hambrick, Noah T Kreski, Jace G Morganstein, Su Hyun Park, Ofole Mgbako, Dustin T Duncan
The current study sought to examine awareness of, willingness to use, and preferences for available and theoretical administration modalities for HIV pre-exposure prophylaxis (PrEP) and the association of anal sex roles with these concepts among a sample of men who have sex with men (MSM) in Paris, France. Broadcast advertisements were placed on a popular geosocial-networking smartphone application for MSM to direct users to complete a Web-based survey. MSM answered questions on their recent engagement in condomless anal intercourse and awareness of and willingness to use PrEP in the form of once daily and event-driven pill regimens, long-acting injections, and penile and rectal microbicides as well as sexual roles...
November 30, 2017: Archives of Sexual Behavior
https://www.readbyqxmd.com/read/29190148/sexual-inactivity-among-transfeminine-persons-a-canadian-respondent-driven-sampling-survey
#17
Ayden I Scheim, Greta R Bauer
Sexual health research with transfeminine persons (individuals assigned male at birth who identify as female or feminine) has focused on HIV infection and sexual function following medical treatments. Yet, approximately half of transfeminine persons in Ontario, Canada, reported no partnered sex in the previous year. Therefore, we identified sociodemographic, social, and psychosocial factors associated with past-year sexual inactivity among transfeminine Ontarians. A multi-mode respondent-driven sampling survey of transgender people was conducted in 2009-2010 (N = 433), including 173 transfeminine individuals who had ever been sexually active...
November 30, 2017: Journal of Sex Research
https://www.readbyqxmd.com/read/29188391/bisexual-and-bidirectional-assessing-the-potential-for-hiv-bridging-in-mozambique
#18
Beverley Cummings, Roberta Horth, Willi McFarland, Tim Lane, Peter W Young, Rassul Nalá, George Rutherford, H Fisher Raymond
African men who have sex with men (MSM) frequently, and often concurrently, have female partners, raising concerns about HIV sexual bridging. We explored potential HIV transmission in Mozambique from and to female partners of MSM focusing on preferred anal sex role and circumcision status. Data collected in a respondent-driven sampling study of MSM in 2011 in Maputo and Beira. Men who had oral or anal sex with other men 12 months prior completed a questionnaire and consented for HIV testing. Statistical analysis explored demographic/risk characteristics and associations among circumcision status, anal sex with men, sexual positions during anal sex with men and vaginal or anal sex with women...
November 29, 2017: AIDS and Behavior
https://www.readbyqxmd.com/read/29183287/hiv-and-hepatitis-b-and-c-co-infection-among-people-who-inject-drugs-in-zanzibar
#19
Ahmed Khatib, Eva Matiko, Farhat Khalid, Susie Welty, Ameir Ali, Asha Othman, Shaaban Haji, Mohammed Dahoma, George Rutherford
BACKGROUND: People who inject drugs are at high risk of acquiring hepatitis B (HBV), hepatitis C (HCV), and human immunodeficiency virus (HIV) due to risky injection and sexual practices. The objective of this study is to investigate the epidemiology of HIV, hepatitis B, and hepatitis C, and co-infection of these viruses among people who inject drugs in Zanzibar, Tanzania. METHODS: We used respondent-driven sampling to identify 408 participants, from whom we collected demographic data, information on sexual behaviours and injection drug practices, and blood samples for biological testing...
November 28, 2017: BMC Public Health
https://www.readbyqxmd.com/read/29182638/respondent-driven-sampling-for-identification-of-hiv-and-hcv-infected-people-who-inject-drugs-and-men-who-have-sex-with-men-in-india-a-cross-sectional-community-based-analysis
#20
Sunil S Solomon, Allison M McFall, Gregory M Lucas, Aylur K Srikrishnan, Muniratnam S Kumar, Santhanam Anand, Thomas C Quinn, David D Celentano, Shruti H Mehta
BACKGROUND: A major barrier to achieving ambitious targets for global control of HIV and hepatitis C virus (HCV) is low levels of awareness of infection among key populations such as men who have sex with men (MSM) and people who inject drugs (PWID). We explored the potential of a strategy routinely used for surveillance in these groups, respondent-driven sampling (RDS), to be used as an intervention to identify HIV- and HCV-infected PWID and MSM who are unaware of their status and those who are viremic across 26 Indian cities at various epidemic stages...
November 2017: PLoS Medicine
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