BACKGROUND Respondent-driven sampling (RDS) is a chain-referral method that is being widely used to recruit most at-risk populations. Because the method is respondent driven, observations are dependent. However, few publications have focused on methodological challenges in the analysis of data collected by RDS. METHODS In this article, we propose a method for estimating the variance of the HI...

OBJECTIVE To estimate the prevalence of the hepatitis C virus (HCV) and HIV infection and associated risk behaviors among injection drug users (IDUs) in two northern Mexican cities. MATERIAL AND METHODS Between February and April 2005, IDUs were recruited in Tijuana (N=222) and Ciudad Juarez (N=206) using respondent-driven sampling (RDS), a chain referral sampling approach. Interviewer-admini...

BACKGROUND HIV epidemics in most countries are highly concentrated among population subgroups such as female sex workers, injecting drug users, men who have sex with men, mobile populations, and their sexual partners. The perception that they are important only when they cause epidemic expansion to general populations has obscured a critical lack of coverage of preventive interventions in these...

DESIGN Pre- and post-Guidelines for Adolescent Preventive Services (GAPS) comparison of outcomes gathered via chart audit. SETTING A rural hospital-based general pediatric clinic. PARTICIPANTS Adolescents who underwent annual examinations between April 1, 1998, and March 31, 2001. A random sample of 441 medical records was reviewed. INTERVENTION Training in the GAPS model and use of the q...

OBJECTIVE To evaluate acceptance, preference and compliance with referral of vaginal self-sampling for the detection of Human papillomavirus (HPV) among women non-adherent to Papanicolaou (Pap) screening in Santiago, Chile. MATERIALS AND METHODS Using multistage sampling we identified women aged 30-64 years who reported not receiving a Pap test in the previous three years and offered them Pap...

Targeted sampling (TS) and respondent-driven sampling methods (RDS) are commonly used methods to sample ‘hard-toreach’ populations, like injection drug users (IDU). There are notable differences between each: TS uses street-based and community based outreach, informed by ethnographic data to locate and recruit a target population [1], but lacks statistical methods to correct for potential biase...

Artikel ini bertujuan mengungkap pengalaman diskriminatif yang dialami pemuda Syiah di lembaga pendidikan dan strategi mereka mengonstruksi identitasnya, baik kelas agama Islam maupun ruang publik pendidikan. merupakan hasil penelitian dengan metode kualitatif-deskriptif terhadap 5 orang Jember direkrut chain-referral sampling method. Data dikumpulkan life-story interview dianalisis teknik inte...

BACKGROUND AND OBJECTIVE The Nigeria Health System operates three levels of health care, which correspond to the tiers of government and interacts through a referral system. The national health policy recommends the Primary Health Care (PHC) as the entry point to health care system. However, these facilities are poorly managed leading to underutilization. Therefore, people usually attend any fa...