scholarly journals General regression methods for respondent-driven sampling data

2021 ◽  
pp. 096228022110327
Author(s):  
Mamadou Yauck ◽  
Erica EM Moodie ◽  
Herak Apelian ◽  
Alain Fourmigue ◽  
Daniel Grace ◽  
...  
Keyword(s):  
Hiv Treatment ◽  
Respondent Driven Sampling ◽  
Regression Methods ◽  
Multivariate Modelling ◽  
Modelling Strategies ◽  
Unknown Structure ◽  
Regression Techniques ◽  
Hard To Reach Populations ◽  
Sex With Men ◽  
General Regression

Respondent-driven sampling is a variant of link-tracing sampling techniques that aim to recruit hard-to-reach populations by leveraging individuals’ social relationships. As such, a respondent-driven sample has a graphical component which represents a partially observed network of unknown structure. Moreover, it is common to observe homophily, or the tendency to form connections with individuals who share similar traits. Currently, there is a lack of principled guidance on multivariate modelling strategies for respondent-driven sampling to address peer effects driven by homophily and the dependence between observations within the network. In this work, we propose a methodology for general regression techniques using respondent-driven sampling data. This is used to study the socio-demographic predictors of HIV treatment optimism (about the value of antiretroviral therapy) among gay, bisexual and other men who have sex with men, recruited into a respondent-driven sampling study in Montreal, Canada.

scholarly journals Simultaneous Recruitment of Drug Users and Men Who Have Sex with Men in the United States and Russia Using Respondent-Driven Sampling: Sampling Methods and Implications

2009 ◽  
Vol 86 (S1) ◽  
pp. 5-31 ◽  
Author(s):  
Martin Y. Iguchi ◽  
Allison J. Ober ◽  
Sandra H. Berry ◽  
Terry Fain ◽  
Douglas D. Heckathorn ◽  
...  
Keyword(s):  
United States ◽  
Drug Users ◽  
Sampling Methods ◽  
The United States ◽  
Respondent Driven Sampling ◽  
Sex With Men

scholarly journals High prevalence of HIV among men who have sex with men in Zhejiang, China: a respondent-driven sampling survey

BMJ Open ◽  
2015 ◽  
Vol 5 (12) ◽  
pp. e008466 ◽  
Author(s):  
Xiaohong Pan ◽  
Minni Wu ◽  
Qiaoqin Ma ◽  
Hui Wang ◽  
Wenzhe Ma ◽  
...  
Keyword(s):  
Respondent Driven Sampling ◽  
High Prevalence ◽  
Sex With Men ◽  
Sampling Survey

scholarly journals Incentives and barriers to HIV testing in men who have sex with men in a metropolitan area in Brazil

2016 ◽  
Vol 32 (5) ◽  
Author(s):  
Valéria Freire Gonçalves ◽  
Ligia Regina Franco Sansigolo Kerr ◽  
Rosa Salani Mota ◽  
Raimunda Hermelinda Maia Macena ◽  
Rosa Lívia de Almeida ◽  
...  
Keyword(s):  
Hiv Testing ◽  
Metropolitan Area ◽  
Low Income ◽  
Demographic Data ◽  
Cross Sectional Study ◽  
Respondent Driven Sampling ◽  
Sectional Study ◽  
Personal Network ◽  
Cross Sectional ◽  
Sex With Men

Abstract: This study aimed to identify incentives and barriers to HIV testing in men who have sex with men (MSM). This was a cross-sectional study of MSM who had lived at least three months in greater metropolitan Fortaleza, Ceará State, Brazil, 2010. The study recruited 391 men ≥ 18 years of age who reported sexual relations with men in the previous six months, using Respondent Driven Sampling. Personal network and socio-demographic data were collected and HIV testing was offered, analyzed with RDSAT 6.0 and Stata 11.0. The majority were young (40.3%), had 5 to 11 years of schooling (57.3%), were single (85.1%), had low income (37.6%), and 58.1% had tested for HIV some time in life. Incentive to test: certainty of not being infected (34.1%) and the exposure to national campaign Fique Sabendo [Know your Status] (34%). Barriers: trust in partner(s) (21%) and fear of discrimination if tested positive (20.3%). Policies should be developed to ensure test confidentiality and communication campaigns focusing on information gaps and encouragement for testing.

scholarly journals HIV risk taking and risk preventing behaviors in men who have sex with men and women: a respondent-driven sampling study in Shenzhen, China

2014 ◽  
Vol 14 (S2) ◽  
Author(s):  
Rui Cai ◽  
Jin Zhao ◽  
Wende Cai ◽  
Lin Chen ◽  
Jan Hendrik Richardus ◽  
...  
Keyword(s):  
Hiv Risk ◽  
Risk Taking ◽  
Respondent Driven Sampling ◽  
Men And Women ◽  
Sex With Men

HIV surveillance and research for migrant populations: a protocol integrating respondent-driven sampling, case finding, and medicolegal services for Venezuelans living in Colombia (Preprint)

2021 ◽  
Author(s):  
Andrea L Wirtz ◽  
Kathleen R Page ◽  
Megan Stevenson ◽  
José Rafael Guillén ◽  
Jennifer Ortíz ◽  
...  
Keyword(s):  
Public Health ◽  
Local Community ◽  
National Health System ◽  
Case Finding ◽  
Hiv Treatment ◽  
Screening Tests ◽  
Respondent Driven Sampling ◽  
Ethical Challenges ◽  
Access To Treatment ◽  
Migrant Populations

BACKGROUND Epidemiologic research among migrant populations is limited by logistical, methodological, and ethical challenges, but necessary for informing public health and humanitarian programming. OBJECTIVE We describe a methodology to estimate HIV prevalence among Venezuelan migrants in Colombia. METHODS Respondent-driven sampling (RDS), a non-probability sampling method, was selected for attributes of reaching highly networked populations without sampling frames and analytic methods that permit estimation of population parameters. RDS was modified to permit electronic referral of peers via SMS and Whatsapp. Participants complete socio-behavioral surveys and rapid HIV and syphilis screening tests with confirmatory testing. HIV treatment is not available for migrants who have entered Colombia through irregular pathways; thus, medicolegal services integrated into post-test counseling provide staff lawyers and legal assistance to participants diagnosed with HIV or syphilis for sustained access to treatment through the national health system. Case finding is integrated into RDS to allow partner referral. The study is implemented by a local community-based organization providing HIV support services and related legal services for Venezuelans in Colombia. RESULTS Data collection launched in four cities in July and August 2021. As of November 2021, 3,105 of the target 6,100 participants were enrolled. CONCLUSIONS Tailored methods that combine community-led efforts with innovations in sampling and linkage to care can aid in advancing health research for migrant and displaced populations. Worldwide trends in displacement and migration underscore the value of improved methods for translation to humanitarian and public health programming.

scholarly journals The Effect of MSM and CD4+ Count on the Development of Cancer AIDS (AIDS-defining Cancer) and Non-cancer AIDS in the HAART Era

2019 ◽  
Vol 16 (4) ◽  
pp. 288-296
Author(s):  
Prosanta Mondal ◽  
Hyun J. Lim ◽  
OHTN Cohort Study Team
Keyword(s):  
Competing Risks ◽  
Joint Modeling ◽  
Study Data ◽  
Hiv Treatment ◽  
Cd4 Count ◽  
Survival Outcomes ◽  
Risk Category ◽  
Joint Models ◽  
Kaplan Meier ◽  
Sex With Men

Background: The HIV epidemic is increasing among Men who have Sex with Men (MSM) and the risk for AIDS defining cancer (ADC) is higher among them. Objective: To examine the effect of MSM and CD4+ count on time to cancer AIDS (ADC) and noncancer AIDS in competing risks setting in the HAART era. Method: Using Ontario HIV Treatment Network Cohort Study data, HIV-positive adults diagnosed between January 1997 and October 2012 having baseline CD4+ counts ≤ 500 cells/mm3 were evaluated. Two survival outcomes, cancer AIDS and non-cancer AIDS, were treated as competing risks. Kaplan-Meier analysis, Cox cause-specific hazards (CSH) model and joint modeling of longitudinal and survival outcomes were used. Results: Among the 822 participants, 657 (79.9%) were males; 686 (83.5%) received anti-retroviral (ARV) ever. Regarding risk category, the majority (58.5%) were men who have Sex with men (MSM). Mean age was 37.4 years (SD = 10.3). In the multivariate Cox CSH models, MSM were not associated with cancer AIDS but with non-cancer AIDS [HR = 2.92; P = 0.055, HR = 0.54; P = 0.0009, respectively]. However, in joint models of longitudinal and survival outcomes, MSM were associated with cancer AIDS but not with non-cancer AIDS [HR = 3.86; P = 0.013, HR = 0.73; P = 0.10]. CD4+ count, age, ARV ever were associated with both events in the joint models. Conclusion: This study demonstrates the importance of considering competing risks, and timedependent biomarker in the survival model. MSM have higher hazard for cancer AIDS. CD4+ count is associated with both survival outcomes.

HIV Treatment and Re-infection Beliefs Predict Sexual Risk Behavior of Men Who Have Sex With Men

2017 ◽  
Vol 29 (3) ◽  
pp. 218-227
Author(s):  
Hong-Ha M. Truong ◽  
Robin Fatch ◽  
H. Fisher Raymond ◽  
Willi McFarland
Keyword(s):  
Risk Behavior ◽  
Sexual Risk ◽  
Sexual Risk Behavior ◽  
Hiv Treatment ◽  
Sex With Men

scholarly journals Performance analysis on least absolute shrinkage selection operator, elastic net and correlation adjusted elastic net regression methods

2015 ◽  
Vol 3 (1) ◽  
pp. 93
Author(s):  
Pascalis Kadaro Matthew ◽  
Abubakar Yahaya
Keyword(s):  
Linear Regression ◽  
Prediction Accuracy ◽  
Penalized Regression ◽  
Ordinary Least Squares ◽  
Complex Model ◽  
Elastic Net ◽  
Data Set ◽  
Regression Methods ◽  
Regression Techniques ◽  
Selection Operator

<p>Some few decades ago, penalized regression techniques for linear regression have been developed specifically to reduce the flaws inherent in the prediction accuracy of the classical ordinary least squares (OLS) regression technique. In this paper, we used a diabetes data set obtained from previous literature to compare three of these well-known techniques, namely: Least Absolute Shrinkage Selection Operator (LASSO), Elastic Net and Correlation Adjusted Elastic Net (CAEN). After thorough analysis, it was observed that CAEN generated a less complex model.</p>

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