S Deren

National Development and Research Institutes, Inc., New York City, NY, USA

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Publications (31)58.05 Total impact

  • Article: Integrating qualitative and quantitative methods: comparing HIV-related risk behaviors among Puerto Rican drug users in Puerto Rico and New York.
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    ABSTRACT: A dual site project was conducted to assess determinants of injection and sex-related risk behaviors among Puerto Rican drug users. The project focused on injection drug users and crack smokers, and was conducted in East Harlem, NY and Bayamón, PR in 1996-2000. Qualitative methods included ethnographic mapping, focus groups, in-depth interviews, and observations. A survey component (East Harlem, n = 800; Bayamón, n = 400) was also conducted. Procedures to ensure integration of methodologies and comparability of data were developed. This paper describes the qualitative and survey methods used, and presents the comparative HIV risk behaviors. The integration of the two methodologies served multiple functions: each component identified issues to be addressed in the other, enhanced cross-site comparability of data, and assisted in interpretation of findings. The survey data showed high levels of risk behaviors in both communities, with significantly higher levels of risk reported in Bayamón. Conducting studies of similar ethnic groups in different communities provides opportunities to examine diverse sources of influence on risk behaviors. The integration of qualitative and quantitative methods can enhance comparability and understanding of findings, particularly when there are differences in behaviors between communities.
    Substance Use &amp Misuse 02/2003; 38(1):1-24. · 1.10 Impact Factor
  • Article: Concurrence of drug users' self-report of current HIV status and serotest results.
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    ABSTRACT: This study examines the concurrence of drug users' self-reports of current HIV status with serotest results. The analyses are based on data obtained from face-to-face interviews with 7,256 out-of-treatment injection drug and/or crack users in 10 sites that participated in the Cooperative Agreement for AIDS Community-Based Outreach/Intervention Research Program (funded by the U.S. National Institute on Drug Abuse ). Although the degree of concurrence between HIV-negative individuals' self-reports of their current HIV status and their serotest results was high (specificity, 99%), this was not the situation for individuals who tested positive for HIV (sensitivity, 44%).
    JAIDS Journal of Acquired Immune Deficiency Syndromes 08/2001; 27(3):301-7. · 4.43 Impact Factor
  • Article: Trends in HIV seroprevalence and needle sharing among Puerto Rican drug injectors in Puerto Rico and New York: 1992-1999.
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    ABSTRACT: This study assessed trends in HIV seroprevalence and needle-sharing behaviors among Puerto Rican injection drug users (IDUs) in Puerto Rico and New York. Data from two studies of IDUs conducted from 1992 through 1995 and 1998 through 1999 in Bayamón, Puerto Rico, and East Harlem, New York, were examined to assess trends over this period. Separate analyses were conducted for IDUs who were current crack smokers. Significant decreasing trends in seroprevalence were found among IDUs in the New York and Puerto Rico samples (p <.001). Significant decreasing trends in receptive and distributive needle sharing were found in the New York sample, and a significant decline in receptive sharing was found in the Puerto Rico sample. Overall, higher levels of needle-sharing behaviors were reported in Puerto Rico compared with New York. Decreasing trends in needle sharing and seroprevalence in both communities are an encouraging finding. Ongoing epidemiologic studies to monitor the epidemic and continued prevention efforts to help maintain or further these declines are needed, particularly to address the higher rates of needle sharing in Puerto Rico.
    JAIDS Journal of Acquired Immune Deficiency Syndromes 03/2001; 26(2):164-9. · 4.43 Impact Factor
  • Article: Drug use, HIV-related risk behaviors and dropout status of new admissions and re-admissions to methadone treatment.
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    ABSTRACT: New entrants to methadone maintenance treatment programs (MMTP) have been reported to have different drug use patterns than re-admissions. This study assesses differences between 211 re-admissions and 128 new admissions to a NYC MMTP. Those new to MMTP were found to be less likely to have ever injected drugs, have used more types of drugs, and used heroin at higher frequencies in the 30 days prior to admission. Within the first three months of treatment, new admissions dropped out at a higher rate than the re-admissions (31% vs. 20%, p < 0.05). The most frequent reasons for dropout, for both groups, included "lost to contact" and incarceration. Further research on strategies to address polydrug use of MMTP admissions is needed. Efforts to identify concerns of new admissions early in treatment, and programs to continue drug treatment services to incarcerated clients, are indicated.
    Journal of Substance Abuse Treatment 03/2001; 20(2):185-9. · 3.14 Impact Factor
  • Article: An alternative program for methadone maintenance dropouts: description and preliminary data.
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    ABSTRACT: Time in drug treatment has been shown to be one of the best predictors of post-treatment success. Since as many as half of the enrollees leave methadone treatment during the first year, the project described in this article was designed to test the effectiveness of an alternative program for individuals who have recently dropped out of methadone maintenance treatment. The goals of this "Alternative Program" are to help participants re-connect with formal drug treatment and other community or medical programs, reduce their HIV risk behavior, decrease or eliminate drug use, join self-help groups, and obtain entitlements. Program components include: contacts by local outreach workers, cognitive-behavioral relapse-prevention group counseling, and individual counseling for needs assessment and referral. This paper describes the basis for development of the intervention, summarizes the methodology being used, and provides preliminary data on participation in the Alternative Program.
    Mount Sinai Journal of Medicine A Journal of Translational and Personalized Medicine 02/2001; 68(1):33-40. · 2.00 Impact Factor
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    Article: HIV incidence among injection drug users in New York City, 1992-1997: evidence for a declining epidemic.
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    ABSTRACT: We assessed recent (1992-1997) HIV incidence in the large HIV epidemic among injection drug users in New York City. Data were compiled from 10 separate studies (N = 4979), including 6 cohort studies, 2 "repeat service user" studies, and 2 analyses of voluntary HIV testing and counseling services within drug treatment programs. In the 10 studies, 52 seroconversions were found in 6344 person-years at risk. The observed incidence rates among the 10 studies were all within a narrow range, from 0 per 100 person-years at risk to 2.96 per 100 person-years at risk. In 9 of the 10 studies, the observed incidence rate was less than 2 per 100 person-years at risk. The weighted average incidence rate was 0.7 per 100 person-years at risk. The recent incidence rate in New York City is quite low for a high-seroprevalence population of injection drug users. The very large HIV epidemic among injection drug users in New York City appears to have entered a "declining phase," characterized by low incidence and declining prevalence. The data suggest that very large high-seroprevalence HIV epidemics may be "reversed."
    American Journal of Public Health 04/2000; 90(3):352-9. · 3.93 Impact Factor
  • Article: HIV infection and patterns of risk among women drug injectors and crack users in low and high sero-prevalence sites.
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    ABSTRACT: As AIDS cases among US women continue to increase, a better understanding of women's behavioural risk patterns is needed to inform intervention efforts. Data were from 2,945 women drug injectors and crack users. Statistical analyses compared sociodemographic variables, lifetime behavioural risk patterns, HIV sero-prevalence and history of sexually transmitted diseases, and determined predictors of HIV infection separately in 16 low and four high sero-prevalence sites. Based on risk patterns, four behaviourally-defined sub-groups were constructed, and rates of HIV sero-prevalence were compared. In comparisons between low and high sero-prevalence sites, there were significant differences on most variables examined, and in the relative importance of the sociodemographic characteristics and risk patterns predicting HIV. Drug injection and sex exchange were each independent, significant, behavioural predictors of infection, with no significant difference between the odds ratios attributed to each predictor. HIV sero-prevalence was significantly different among four sub-groups. Interventions must be tailored to address observed differences among women in low and high sero-prevalence sites. Injection drug use and exchanging sex each play a major role in the transmission of HIV infection to US women. Prevention efforts targeted at women should address differences in behavioural risk patterns. Aggressive and innovative interventions are needed for women who exchange sex. AIDS research must investigate how socioeconomic factors impact women's risk for HIV infection.
    AIDS Care 03/2000; 12(1):65-76. · 1.60 Impact Factor
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    Article: Understanding HIV risks of chronic drug-using men who have sex with men.
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    ABSTRACT: Focus groups and individual structured interviews were conducted in six cities with 98 predominantly street-recruited men who had a recent history of smoking crack or injecting drugs and who reported having had sex with other men (MSM) in the past year. Twenty-six focus groups explored the cultural and social context of participant's drug use and sexual activity and addressed outreach and HIV prevention issues pertinent to this population. Narrative summaries developed from verbatim focus group transcripts identified seven themes: (a) sexual orientation and gender identity; (b) interactions within and between MSM networks; (c) drug use, sexual activity and personal relationships; (d) HIV transmission bridges; (e) preferred HIV information sources; (f) HIV knowledge, prevention practices and risk behaviours; and (g) availability of HIV and drug-related services. Of the 98 MSM drug users, 42% identified publicly as gay or homosexual; 35% identified publicly, but only 21% privately, as heterosexual. A total of 51% had one or more female sex partners in the past year. There was a high frequency of unprotected sex in conjunction with drug use and a distinct preference for having sex when high. For most participants, drug use rather than sexual orientation formed the core of personal identity. Participants reported associating primarily with other drug users, usually MSM, and had limited contact with people who did not use drugs and the mainstream gay community. Participants' sexual and drug-injecting activities were judged to be a bridge for transmission of HIV to both people who used drugs and those who did not.
    AIDS Care 01/2000; 11(6):629-48. · 1.60 Impact Factor
  • Article: Agreement between urinalysis and self-reported drug use.
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    ABSTRACT: One hundred fifty-eight drug users received an interview that included self-reported drug use. Opiate/cocaine use in the prior 48 hours was assessed by urinalysis. Fifty-five subjects received a urine test after the interview and 103 were tested before. Chi-square tests were performed to determine if agreement between self-reported drug use and urine test results was associated with timing of urine testing. The rate of agreement was 58% when the urine test was performed after the interview and 93% when performed before the interview (chi2 = 28.6, p < .001). Conducting urine tests before an interview can increase the accuracy of self-reports.
    Substance Use &amp Misuse 09/1999; 34(11):1585-92. · 1.10 Impact Factor
  • Article: Trends in injection risk behaviors in a sample of New York City injection drug users: 1992-1995.
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    ABSTRACT: This study assessed the relation between year of recruitment into an AIDS prevention project and likelihood of engaging (yes/no) in injection risk behaviors. In total, 834 injection drug users were recruited over a 44-month period (January 1992-August 1995) in New York City. Logistic regression was used to examine trends in three behaviors, across four successive annual cohorts: using needles/syringes that were previously used by another person, using injection supplies (e.g., cookers, cotton, rinse water) that had been previously used, and giving or lending of used needles/syringes to another person. Significant (p < .0001) decreasing trends occurred in two behaviors: giving or lending of used needles/syringes to another person and use of injection supplies that had been used by another person. Sample characteristics were generally consistent over time and did not obviate significant injection risk trends. Decreasing trends in injection risk behaviors could not be explained by changing sample characteristics. Even though some injectors report engaging in risky injection practices, the confluence of numerous AIDS prevention efforts in the 1990s has contributed to an overall reduction in the likelihood of such behaviors.
    Journal of Acquired Immune Deficiency Syndromes and Human Retrovirology 04/1999; 20(3):283-9.
  • Article: Predictors of change in frequency of crack cocaine use in a street-recruited sample.
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    ABSTRACT: Crack cocaine users are at high risk for HIV, with higher frequency crack users engaging in higher rates of HIV-related sexual risk behaviors. This study will assess the variables impacting changes in crack use frequency. Out-of-treatment crack users were street recruited in East Harlem, NY. Subjects (n = 727) were 33% female, 91% minority, and 28% reported recent drug injecting. Baseline and 6-month follow-up interviews were administered. There was a significant reduction in crack use over time (p < .0001). Subjects were categorized according to five groups, based on their change in level of crack use between the two interviews, to predict those who stopped, maintained, or changed their level of use. Discriminant analyses identified six variables as the best predictors of the five groups, including having been in drug treatment since baseline and having been a drug injector (both related to reduced levels of crack use). The overall reduction in crack use for the sample masked the fact that important subgroups remained at high use levels or increased their use. The identification of subgroups who may be most resistant to reducing drug use can be helpful in developing more effective interventions.
    American Journal on Addictions 01/1999; 8(2):94-100. · 1.74 Impact Factor
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    Article: Declining seroprevalence in a very large HIV epidemic: injecting drug users in New York City, 1991 to 1996.
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    ABSTRACT: This study assessed recent trends in HIV seroprevalence among injecting drug users in New York City. We analyzed temporal trends in HIV seroprevalence from 1991 through 1996 in 5 studies of injecting drug users recruited from a detoxification program, a methadone maintenance program, research storefronts in the Lower East Side and Harlem areas, and a citywide network of sexually transmitted disease clinics. A total of 11,334 serum samples were tested. From 1991 through 1996, HIV seroprevalence declined substantially among subjects in all 5 studies: from 53% to 36% in the detoxification program, from 45% to 29% in the methadone program, from 44% to 22% at the Lower East Side storefront, from 48% to 21% at the Harlem storefront, and from 30% to 21% in the sexually transmitted disease clinics (all P < .002 by chi 2 tests for trend). The reductions in HIV seroprevalence seen among injecting drug users in New York City from 1991 through 1996 indicate a new phase in this large HIV epidemic. Potential explanatory factors include the loss of HIV-seropositive individuals through disability and death and lower rates of risk behavior leading to low HIV incidence.
    American Journal of Public Health 01/1999; 88(12):1801-6. · 3.93 Impact Factor
  • Article: Differences in condom behaviors and beliefs among female drug users recruited from two cities.
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    ABSTRACT: This paper examines predictors of condom cognitions and condom use for vaginal sex within women's main and paying partnerships. The sample consisted of active injection drug and crack-using women recruited from two cities with disparate HIV rates. A total of 338 drug-using women who reported vaginal sex with a main and/or paying partner in the prior 30 days were recruited for this study. Recruitment site was a significant predictor for several of the variables examined, for both main and paying partners. Ethnicity and prior HIV test result were also significant predictors, but only for main sex partners. Findings support previous research and suggest that the factors which predict condom beliefs, intention, and behaviors are different for main versus paying partners. Interventions designed to increase condom use must recognize that cognitive factors associated with condom use may vary by partner type, ethnicity, and recruitment site, particularly when important contextual variables, such as local seroprevalence, vary.
    Women & Health 02/1998; 27(1-2):137-60. · 1.00 Impact Factor
  • Article: Predictors of HIV infection among women drug users in New York and Miami.
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    ABSTRACT: In the US, the number of women diagnosed with AIDS continues to increase. In this study, women in New York City (East Harlem) and Miami, two sites with high rates of drug use and HIV infection, were first compared on sociodemographic variables and risk behaviors. Logistic regression analyses were used to identify significant, independent predictors of HIV infection in each city. In comparing women from the two cities, several differences in sociodemographic characteristics and drug use were observed. In both cities, ever exchanging sex for drugs and/or money was predictive of HIV infection; and in East Harlem only, other lifetime risk variables independently predicted HIV infection: drug injection, having a sexually transmitted disease, and not having graduated from high school. Results suggest that intervention efforts with women who exchange sex should be intensified in both cities. Also, further comparisons of women drug users in AIDS epicenter cities are necessary to provide information on similarities and differences in sociodemographic characteristics and individual risk behaviors. More research attention should be focused on examining the social context of HIV risk in order to develop innovative intervention strategies which focus on the link between contextual factors and HIV infection.
    Women & Health 02/1998; 27(1-2):191-204. · 1.00 Impact Factor
  • Article: Urban crack users: gender differences in drug use, HIV risk and health status.
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    ABSTRACT: This study assessed gender differences in drug use, HIV risk, and health status in a sample of urban crack users. Using targeted sampling, 1434 crack users (66% male and primarily African-American and Puerto Rican), were recruited from the streets of East Harlem, New York City. A standardized, structured interview was administered, drug use was validated by urinalysis, and HIV testing was offered. Gender differences were observed on sociodemographic variables and patterns of drug use. Other than welfare, men and women cited different major sources of income. Women reported greater use of crack, and men were more likely to use injection drugs as well as crack. Data on sexual risk indicated that women had more sexual partners than men, but the percentage of unprotected vaginal sex for both men and women was greater for those who did not exchange sex for drugs and/or money. The number of persons already infected with HIV was substantial. Many reported histories of other sexually transmitted diseases which were generally higher among men. Future research should investigate the relationship between gender and other factors (e.g., ethnicity, geographic location) associated with HIV risk.
    Women & Health 02/1998; 27(1-2):177-89. · 1.00 Impact Factor
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    Article: Crack users in east Harlem, New York and Philadelphia, Pennsylvania: HIV-related risk behaviors and predictors of serostatus.
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    ABSTRACT: Crack use has been associated with increased risk for HIV seropositivity. This study was undertaken to examine HIV-related risk behaviors among crack users in East Harlem, New York and Philadelphia, Pennsylvania, two northeastern communities which have reported extensive crack use. Crack users recruited in East Harlem (n = 1434) and Philadelphia (n = 694) were compared on demographics, drug and sex-related risk behaviors, health-related behaviors, and HIV serostatus. Many significant differences were found, and seropositivity was higher in the New York sample (25% vs. 11%, chi 2 = 36.28, p < .001). Being a recent drug injector was a significant predictors of seropositivity in both communities, and differences between communities were found in additional predictors of serostatus. Results suggest that tailored HIV interventions may be needed for different communities. In addition, aggregate data across communities, even those that may be in geographical proximity, may obfuscate differences important to incorporate in developing prevention/intervention efforts.
    The American Journal of Drug and Alcohol Abuse 11/1997; 23(4):555-67. · 1.55 Impact Factor
  • Article: Gender differences and other factors associated with HIV testing in a national sample of active drug injectors.
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    ABSTRACT: Gender, health, HIV risk, and demographic factors were examined with chi-square and logistic regression analyses to assess which of these factors are most predictive of active injection drug users' (IDUs') getting tested for HIV. Analyses were based on 36,898 IDUs recruited to participate in a nationwide multisite HIV prevention project. Women IDUs were recently tested (prior 6 months) more than men IDUs. Health factors, particularly for women IDUs, predicted who got tested for HIV more than risk or demographic factors. HIV testing usually occurred when disease symptomatology developed, after a long period of being capable of transmitting HIV to others, and when the benefits of AZT and other interventions may be reduced. Preventive interventions with IDUs are needed that emphasize the possible benefits of HIV testing and that encourage testing before symptoms develop.
    AIDS Education and Prevention 09/1997; 9(4):342-58. · 1.59 Impact Factor
  • Article: A multisite study of sexual orientation and injection drug use as predictors of HIV serostatus in out-of-treatment male drug users.
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    ABSTRACT: The risk groups of men who have sex with men and injection drug users (IDUs) together account for 90% of all male AIDS cases. The extent to which each risk behavior contributes to seroprevalence among IDUs has not been determined and is critical for intervention development. Analysis of data on sexual orientation, injection drug use, and HIV serostatus was undertaken in a multisite study of 3002 male drug injectors and crack smokers recruited for HIV prevention projects. Overall HIV seroprevalence was 8.4%; 57.1% for gay men, 25.4% for bisexual men, and 7.4% for heterosexuals (p = 0.001). Logistic regression analyses indicated being gay (OR = 24.08) and coming from an area where seroprevalence is high among IDUs (OR = 4.07) were the best predictors of serostatus. Ever having injected was significant only in interaction with moderate (OR = 3.09) or high (OR = 4.71) IDU seroprevalence areas. Among this multisite sample of drug users, being a gay drug user is the strongest predictor of serostatus. Drug injection is significant only in areas of moderate or high seroprevalence among injectors. This indicates the importance of targeted outreach and intervention efforts.
    Journal of Acquired Immune Deficiency Syndromes and Human Retrovirology 09/1997; 15(4):289-95.
  • Article: Dominican, Mexican, and Puerto Rican prostitutes: drug use and sexual behaviors.
    Hispanic Journal of Behavioral Sciences 06/1997; 19(2):202-13. · 0.50 Impact Factor
  • Article: HIV risk behaviors among Dominican brothel and street prostitutes in New York City.
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    ABSTRACT: Latina women are overrepresented among AIDS cases in the United States. To assist in developing appropriate prevention and intervention programs, information regarding HIV risk behaviors is needed on the many diverse Latina subgroups. This study examined sociodemographic characteristics and HIV risk behaviors of Dominican female prostitutes, comparing those who worked primarily in brothels with those who were street workers. A total of 77 Dominican prostitutes (54 brothel; 23 street) were recruited in New York City to participate in a structured interview and were offered HIV testing. Ethnographic interviews were conducted with a subscale. Results indicated that there were many significant differences in demographics and risk behaviors between the two groups, and those working in brothels engaged in lower levels of risk behaviors. In addition, those working in brothels had closer ties to the Dominican and Spanish cultures. Implications for AIDS prevention efforts are discussed.
    AIDS Education and Prevention 11/1996; 8(5):444-56. · 1.59 Impact Factor