Juan D. Ruiz

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The objective of this study was to determine the primary predictors of failure to return (FTR) for HIV test results and counseling by test site type from among those variables collected during the pretest, risk assessment session. The study sample consisted of 366,280 clients tested for HIV antibodies over an 18-month period at publicly funded testing sites(More)
Morbidity, mortality, and drug treatment data suggest that methamphetamine use is on the rise. Based on research findings of the sexual behaviors of methamphetamine-using injection drug users, we chose to examine the relationship between methamphetamine use during sex and risky sexual behaviors and human immunodeficiency virus (HIV) seropositivity among(More)
Our primary objective was to examine the relationship between methamphetamine use and sexual risk-taking behaviors--number of sexual partners, frequency of sexual behaviors with regular and casual partners, trading money or drugs for sex, and condom use--among male and female out-of-treatment injection drug users (OTIDUs). As a risk group for human(More)
OBJECTIVES To describe knowledge of primary and secondary sexual partner's HIV serostatus and sexual practices, including serosorting, among men who have sex with men (MSM) living in California. METHODS Men who self-identified as gay/bisexual in the 2001 California Health Interview Survey, a statewide biennial random-digit-dial survey interviewing more(More)
BACKGROUND Previous studies have shown an association between Mexican migration to the United States and an increased frequency of HIV high-risk behaviors among male Mexican migrants. However, the individual level change in these behaviors after migration has not been quantified. OBJECTIVE To estimate the change in HIV high-risk behaviors among Mexican(More)
For Mexican migrants and recent immigrants, the impact of migration from Mexico to California has the potential to lead to an increased risk for HIV infection. Until recently, the prevalence of HIV in Mexico and among Mexican migrants in California appeared to be stable and relatively low. Recent studies have raised new concerns, however, that the HIV(More)
OBJECTIVES We evaluated risk for hepatitis C virus (HCV) infection in women residing in low-income neighborhoods of northern California. METHODS A population-based sample of 1707 women, aged 18 to 29, were surveyed and screened for sexually transmitted infections and HCV. RESULTS Women infected with HCV (2.5%) were more likely to have a history of(More)
OBJECTIVES/GOAL We compared risk behaviors and HIV testing between recent (in the U.S. <5 years) and established (in the U.S. >5 years) Hispanic immigrant men (N = 410). STUDY This study was a population-based, cross-sectional survey of HIV/sexually transmitted disease markers and risk behaviors in men age 18 to 35 years residing in low-income census(More)
OBJECTIVES To investigate HIV prevalence, sexual risk behaviors, and HIV testing among men who have sex with men (MSM) between 18 and 64 years old living in California. DESIGN Cross-sectional study of a statewide population-based sample of MSM. METHODS Using data from the 2001 California Health Interview Survey (CHIS 2001), 398 men who self-identified(More)
BACKGROUND AND OBJECTIVES Few studies concerning human immunodeficiency virus (HIV) and its risk behaviors have been conducted among young men who have sex with men (YMSM). These are important because YMSM will have profound influence on the HIV/acquired immunodeficiency syndrome epidemic. GOALS To estimate the prevalence of and risk factors associated(More)