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Biomedical subjects

J R Guydish

Publications and source records attributed to J R Guydish.

5 recordsLinked to original sources
PubMed2001

Investigation of a secondary syringe exchange program for homeless young adult injection drug users in San Francisco, California, U.S.A.

This study investigated an HIV prevention program for homeless young adult injection drug users (IDUs) that combined a secondary syringe exchange program (SEP) with community-level activities. Homeless young IDUs were recruited from street-based settings in San Francisco, and a structured questionnaire was administered. The secondary SEP operated in a circumscribed geographic area, and for analytic purposes respondents were assigned to the intervention site group if they primarily spent time in this area (n = 67), or the comparison site group if they primarily spent time elsewhere (n = 55). Almost all (96%) intervention site youth had used the secondary SEP in the past 30 days and were significantly more likely to regularly use SEP. In bivariate analysis, comparison site IDUs were more likely to share syringes, reuse syringes, share the cotton used to filter drugs, and use condoms with casual sex partners only inconsistently. In multivariate analysis, comparison site remained positively associated with sharing syringes (adjusted odds ratio [AOR], 3.748; 95% confidence interval [CI], 1.406-9.988), reusing syringes (AOR, 2.769; 95% CI,1.120-6.847), and inconsistent condom use with casual sex partners (AOR, 4.825; 95% CI, 1.392- 16.721). This suggests that the intervention was effective in delivering SEP services to homeless young adult IDUs, and that IDUs who frequented the intervention site had a lower HIV risk than comparison group IDUs.

Adult↗
PubMed1999

Changes in HIV-related risk behaviors following drug abuse treatment.

OBJECTIVES: To measure changes in HIV-related injection drug and sexual risk behaviors following drug treatment in a therapeutic community program. METHODS: We conducted a prospective cohort study of 261 drug users, randomly assigned to day or residential treatment. Participants were interviewed 2 weeks after entering treatment and 6, 12 and 18 months later (follow-up rate: 83%). RESULTS: Greater reductions in injection risk behaviors were associated with more time in treatment and the later waves of measurement. Wave was also associated with a reduction of sexual risk behavior. CONCLUSIONS: Drug abuse treatment was associated with a decrease in HIV-related risk behavior.

Adult↗
PubMed1994

Are bisexually identified men in San Francisco a common vector for spreading HIV infection to women?

OBJECTIVES: This article examines sexual risk taking among self-identified bisexual men in San Francisco and whether risk reduction has occurred, with respect to both homosexual and heterosexual behaviors, among human immunodeficiency virus (HIV) antibody-positive and HIV antibody-negative men. It also examines psychosocial correlates of unprotected anal and vaginal intercourse. METHODS: The participants were members of a population-based longitudinal cohort of 1034 single men aged 25 through 54 years recruited from the 19 census tracts in San Francisco that had the greatest prevalence of the acquired immunodeficiency syndrome in 1984. Of the total sample, 140 subjects initially identified themselves as bisexual; 85% of these men remained in the study. RESULTS: The participants reported dramatic reductions in sexual risk taking. Prevalences of unprotected anal sex with men were similar among HIV-positive bisexual men (89% in 1984-1985 and 18% in 1988-1989) and those who were HIV negative (65% and 20%). The prevalence of unprotected vaginal sex was much lower for HIV-positive men (16% in 1984-1985 and 2% in 1988-1989) than for HIV-negative men (35% and 20%). Unprotected intercourse was associated primarily with situational and interpersonal factors. CONCLUSIONS: Striking reductions in risk behaviors were reported. This subgroup of single, bisexually identified men appears unlikely to be a common vector for spreading HIV infection to women.

Adult↗
PubMed1990

Changes in needle sharing behavior among intravenous drug users: San Francisco, 1986-88.

We analyzed data for San Francisco intravenous drug users entering treatment, April 1986-September 1988 (N = 7,660). The proportion of cases reporting any needle sharing in the month preceding treatment decreased from 50 percent in 1986 to 28 percent in 1988. Similar decreases were reported by two longitudinal cohorts (needle sharing by the same individuals) admitted in 1986 and 1987 (n = 303), and in 1986 and 1988 (n = 205). In a multiple logistic regression model four variables predicted needle sharing: earlier time of admission, cocaine use, younger age, and being White rather than Black.

Acquired Immunodeficiency Syndrome↗