Faculty Bibliography

We report on psychometric properties of a new questionnaire to study long-term strategies, practices and tactics that may help injection drug users (IDUs) avoid infection with HIV and hepatitis C. Sixty-two long-term IDUs were interviewed in New York City in 2009. Five scales based on a total of 47 items were formed covering the following domains: stigma avoidance, withdrawal prevention, homeless safety, embedding safety within a network of users, and access to resources/social support. All scales (alpha >/= .79) except one (alpha = .61) were highly internally consistent. Seven single-item measures related to drug use reduction and injection practices were also analyzed. All variables were classified as either belonging to a group of symbiotic processes that are not directly focused upon disease prevention but nonetheless lead to risk reduction indirectly or as variables describing prevention tactics in risky situations. Symbiotic processes can be conceived of as unintentional facilitators of safe behaviors. Associations among variables offer suggestions for potential interventions. These Staying Safe variables can be used as predictors of risk behaviors and/or biological outcomes.

Little information exists on the population prevalence or geographic distribution of injection drug users (IDUs) who are Hispanic in the USA. Here, we present yearly estimates of IDU population prevalence among Hispanic residents of the 96 most populated US metropolitan statistical areas (MSAs) for 1992-2002. First, yearly estimates of the proportion of IDUs who were Hispanic in each MSA were created by combining data on (1) IDUs receiving drug treatment services in Substance Abuse and Mental Health Services Administration (SAMHSA)'s Treatment Entry Data System, (2) IDUs being tested in the Centers for Disease Control and Prevention (CDC) HIV-Counseling and Testing System, and (3) incident AIDS diagnoses among IDUs, supplemented by (4) data on IDUs who were living with AIDS. Then, the resulting proportions were multiplied by published yearly estimates of the number of IDUs of all racial/ethnic groups in each MSA to produce Hispanic IDU population estimates. These were divided by Hispanic population data to produce population prevalence rates. Time trends were tested using mixed-effects regression models. Hispanic IDU prevalence declined significantly on average (1992 mean = 192, median = 133; 2002 mean = 144, median = 93; units are per 10,000 Hispanics aged 15-64). The highest prevalence rates across time tended to be in smaller northeastern MSAs. Comparing the last three study years to the first three, prevalence decreased in 82% of MSAs and increased in 18%. Comparisons with data on drug-related mortality and hepatitis C mortality supported the validity of the estimates. Generally, estimates of Hispanic IDU population prevalence were higher than published estimates for non-Hispanic White residents and lower than published estimates for non-Hispanic Black residents. Further analysis indicated that the proportion of IDUs that was Hispanic decreased in 52% and increased in 48% of MSAs between 2002 and 2007. The estimates resulting from this study can be used to investigate MSA-level social and economic factors that may have contributed to variations across MSAs and to help guide prevention program planning for Hispanic IDUs within MSAs. Future research should attempt to determine to what extent these trends are applicable to Hispanic national origin subgroups.

Objectives. We examined race differences in the longitudinal associations between adolescent alcohol use and adulthood sexually transmitted infection (STI) risk in the United States. Methods. We estimated multivariable logistic regression models using Waves I (1994-1995: adolescence) and III (2001-2002: young adulthood) of the National Longitudinal Study of Adolescent Health (n = 10 783) to estimate associations and assess differences between Whites and African Americans. Results. In adjusted analyses, adolescent alcohol indicators predicted adulthood inconsistent condom use for both races but were significantly stronger, more consistent predictors of elevated partnership levels for African Americans than Whites. Among African Americans but not Whites, self-reported STI was predicted by adolescent report of any prior use (adjusted odds ratio [AOR] = 1.47; 95% confidence interval [CI] = 1.00, 2.17) and past-year history of getting drunk (AOR = 1.53; 95% CI = 1.01, 2.32). Among Whites but not African Americans, biologically confirmed STI was predicted by adolescent report of past-year history of getting drunk (AOR = 1.68; 95% CI = 1.07, 2.63) and consistent drinking (AOR = 1.65; 95% CI = 1.03, 2.65). Conclusions. African American and White adolescent drinkers are priority populations for STI prevention. Prevention of adolescent alcohol use may contribute to reductions in adulthood STI risk.

This article describes a randomized study to determine the effectiveness of a reentry modified therapeutic community (RMTC) for offenders with co-occurring substance use and mental disorders (co-occurring disorders or COD). Men with COD, approved for community corrections placement postrelease, were recruited from nine Colorado prisons and stratified according to the type of treatment received while incarcerated (i.e., a prison modified therapeutic community [MTC] program or standard care). When released, each offender was randomly assigned either to the experimental RMTC (E-RMTC) condition (n = 71) or to the control parole supervision and case management (PSCM) condition (n = 56). An intent-to-treat analysis 12 months postprison release showed that the E-RMTC participants were significantly less likely to be reincarcerated (19% vs. 38%), with the greatest reduction in recidivism found for participants who received MTC treatment in both settings. These findings support the RMTC as a stand-alone intervention and provide initial evidence for integrated MTC programs in prison and in aftercare for offenders with COD.

This clinical trial evaluated a modified therapeutic community aftercare (MTC-A) program for a population triply diagnosed with HIV/AIDS, a substance use disorder, and a mental disorder. After six months of MTC residential treatment (MTC-R), subjects were randomly assigned to MTC-A (n=42) or to standard aftercare (C; n=34). Follow-up interviews at six and 12 months assessed eight outcome domains and adherence to prescribed HIV medication. A propensity model was used to re-balance the retrieved sample. At the six-month follow-up, High stratum MTC-A clients (those with greater psychological functioning and stable physical health at baseline) had greater improvement overall and for substance use and mental health than C clients in the same stratum. In contrast, C clients in the Low/Medium stratum (those with poorer psychological functioning and improved physical health) had more favorable outcomes overall and for substance use than their MTC-A counterparts; however, this stratum was not re-balanced effectively. Differences in HIV medication adherence were not detected. Clients with greater psychological functioning and stable health at treatment entry benefit more from the MTC-A program. In view of the potentially progressive nature of HIV, measuring physical and mental health during treatment and controlling for changes could be important in future research.

Young injection drug users (IDUs) are at risk for acquiring blood-borne diseases like HIV and Hepatitis C. Little is known about the population prevalence of young IDUs. We (1) estimate annual population prevalence rates of young IDUs (aged 15-29) per 10,000 in 95 large U.S. metropolitan statistical areas (MSAs) from 1992 to 2002; (2) assess the validity of these estimates; and (3) explore whether injection drug use among youth in these MSAs began to rise after HAART was discovered. A linear mixed model (LMM) estimated the annual population prevalence of young IDUs in each MSA and described trends therein. The population prevalence of IDUs among youths across 95 MSAs increased from 1996 (mean = 95.64) to 2002 (mean = 115.59). Additional analyses of the proportion of young IDUs using health services suggest this increase may have continued after 2002. Harm reduction and prevention research and programs for young IDUs are needed

It has been speculated that symptomatic seroma, or seroma requiring needle aspiration, is one of the risk factors for lymphedema symptoms following breast cancer treatment. These symptoms exert tremendous impact on patients' quality of life and include arm swelling, chest/breast swelling, heaviness, tightness, firmness, pain, numbness, stiffness, or impaired limb mobility. Our aim was to explore if symptomatic seroma affects lymphedema symptoms following breast cancer treatment. Data were collected from 130 patients using a Demographic and Medical Information interview tool, Lymphedema and Breast Cancer Questionnaire, and review of medical record. Arm swelling was verified by Sequential Circumferential Arm Measurements and Bioelectrical Impedance Spectroscopy. Data analysis included descriptive statistics, Chi-squared tests, regression, exploratory factor analysis and exploratory structural equation modeling. Thirty-five patients (27%) developed symptomatic seroma. Locations of seroma included axilla, breast, and upper chest. Significantly, more women with seroma experienced more lymphedema symptoms. A well-fit exploratory structural equation model [X2(79) = 92.15, p = 0.148; CFI = 0.97; TLI = 0.96] revealed a significant unique effect of seroma on lymphedema symptoms of arm swelling, chest/breast swelling, tenderness, and blistering (beta = 0.48, p < 0.01). Patients who developed symptomatic seroma had 7.78 and 10.64 times the odds of developing arm swelling and chest/breast swelling versus those who did not, respectively (p < 0.001). Symptomatic seroma is associated with increased risk of developing lymphedema symptoms following breast cancer treatment. Patients who develop symptomatic seroma should be considered at higher risk for lymphedema symptoms and receive lymphedema risk reduction interventions.

BACKGROUND: In the United States, among those entering opioid treatment programs (OTPs), prescription opioid (PO) abusers tend to be younger than heroin users. Admissions of older persons to OTPs have been increasing, and it is important to understand typical patterns of use among those older enrolees. METHODS: To disentangle the effect of age on recent heroin and PO abuse 29,114 enrolees into 85 OTPs were surveyed across 34 states from 2005-2009. OTPs where PO use was prevalent were oversampled. RESULTS: Mean age was 34; 28% used heroin only. Younger enrolees had increased odds of using POs relative to using heroin only but mixed model analysis showed that much of the total variability in type of use was attributed to variation in age between OTPs rather than within OTPs. CONCLUSIONS: Organizational and cultural phenomena (e.g., OTP characteristics) must be examined to better understand the context of individual characteristics (e.g., age). If nesting of enrolees within OTPs is ignored, then associations that primarily operate at the OTP level may be misinterpreted as exclusively dependent on individuals.

OBJECTIVES: We examined the efficacy of a peer-driven intervention to increase rates of screening for AIDS clinical trials among African Americans and Hispanics living with HIV/AIDS. METHODS: We used a randomized controlled trial design to examine the efficacy of peer-driven intervention (6 hours of structured sessions and the opportunity to educate 3 peers) compared with a time-matched control intervention. Participants were recruited using respondent-driven sampling (n = 342; 43.9% female; 64.9% African American, 26.6% Hispanic). Most participants (93.3%) completed intervention sessions and 64.9% recruited or educated peers. Baseline and post-baseline interviews (94.4% completed) were computer-assisted. A mixed model was used to examine intervention effects on screening. RESULTS: Screening was much more likely in the peer-driven intervention than in the control arm (adjusted odds ratio [AOR] = 55.0; z = 5.49, P < .001); about half of the participants in the intervention arm (46.0%) were screened compared with 1.6% of controls. The experience of recruiting and educating each peer also increased screening odds among those who were themselves recruited and educated by peers (AOR = 1.4; z = 2.06, P < .05). CONCLUSIONS: Peer-driven intervention was highly efficacious in increasing AIDS clinical trial screening rates among African Americans and Hispanics living with HIV/AIDS.