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This article cites a new study that provides an advance in evolutionary research through reconciling data from the fossil record and the molecular clock. According to this study, estimating species divergence times from molecular sequence data via phylogenetic trees is possible with the molecular clock, which allows the separation of rate and time by assuming a constant rate of molecular evolution. The study reduces the gap between molecular and fossil dates using three strategies: first, increasing the size of the data set, both in width, that is, the number of genes and the number of taxa; second, using a large number of fossil calibration points; and third, incorporating uncertainty in both evolutionary rates and fossil calibration points.

OBJECTIVE: This study aimed to assess whether participants in an HIV-intensive prevention program and participants in a general women's health promotion program reported greater HIV risk-reduction than participants in a wait-list control group immediately following program participation and at three-month follow-up. METHODS: The authors studied 162 Hispanic women ages 18 to 35 years, most of them immigrants. Three-fourths of the sample (74%) reported earning less than $800 a month, 29% did not have a high school degree, and 90% had children. Data were gathered through surveys at baseline, at intervention completion, and at three-month follow-up. Information was collected on sociodemographics, HIV risk factors, and risk behaviors. Crude and adjusted (for demographics and dose) logistic regression analyses were used to assess program effects on participants' risk reduction. RESULTS: Crude logistic regression analyses reveal that both programs resulted in increased condom use at post-test and follow-up. Only participants in the HIV-intensive prevention program reported increased safer sex negotiation at post-test and follow-up, however, and only participants in the women's health promotion program reported increased HIV testing at post-test. CONCLUSION: Both interventions increased condom use. The HIV-intensive prevention program appeared to be more effective in promoting safer sex negotiation, and the women's health promotion program appeared more effective in promoting HIV testing. The findings suggest that both approaches may be viable ways to package HIV prevention for short-term behavior change in this population. [ABSTRACT FROM AUTHOR]

This study investigated the role of incarceration in HIV/STD risk among 197 Black men who have sex with men in Massachusetts, USA. More than half (51%) reported a history of incarceration (28% < 90 days in jail/prison; 23% >= 90 days in jail/prison). Multivariable logistic regression models adjusted for age and sexual orientation examined associations between demographic, behavioural, social-psychological and cultural factors and incarceration history. Factors associated with < 90 days of incarceration were: unprotected sex with a man, STD history, injection drug use and substance abuse treatment. Factors associated with >= 90 days of incarceration were: unprotected sex with a woman, crack use during sex, STD history, injection drug use, substance abuse treatment, depressive symptoms, post-traumatic stress symptoms, HIV fatalism and social capital. Black men who have sex with men with incarceration histories may be at increased risk for HIV/STDs compared to those without such histories. HIV prevention efforts that focus on individual risk and cultural-contextual issues among Black men who have sex with men are warranted. [ABSTRACT FROM AUTHOR]

HIV prevention community planning groups were formed to increase stakeholder participation and develop evidence-based comprehensive HIV prevention plans. To date, it is not well understood what factors affect group behavior as the planning group prepares for data-informed decision making. In this observational case study, the authors videotaped 18 meetings of a community planning group (CPG) to observe how a group's behavior changes over time in response to modifications in its structure and function. Discussions on authority and conflict were common, particularly during presentations on prioritized populations and interventions. Changes in the frequency of data-informed discussions were not statistically significant. Observed group conflict may have been an unintended consequence of efforts to improve equity. The authors suggest that formal and informal mechanisms to manage conflict and agreed-on procedures for decision making should be incorporated into the technical assistance offered to CPGs. Future studies should address whether data-informed decisions increase once contentious issues are resolved. [ABSTRACT FROM AUTHOR]

This article describes, compares, and contrasts the contexts, processes, and results of the experiences of Maryland and Massachusetts in diffusing evidence-based interventions. The evolution of first Maryland's, then Massachusetts's, diffusion of effective interventions is described. Both states have extensive experience planning, developing and evaluating individual-, group-, and community-level interventions promoted in the Centers for Disease Control and Prevention's Diffusion of Effective Behavioral Interventions (DEBI) initiative, as well as overcoming many barriers to translate research to practice. This article describes the processes whereby effective interventions were diffused from the planning to evaluation stages. This includes the role of community-planning groups and other local stakeholders in planning, procurement methods, and capacity building approaches. Specific milestones in increasing the evidence basis of program implementation, management, and evaluation are presented. For jurisdictions considering implementing DEBI, the article illustrates core programmatic and infrastructure capacities at the state and vendor level important to success in Maryland and Massachusetts. It also describes how each state's approach to the management and evaluation of prevention programs contributed to the effective diffusion of the behavioral interventions. Finally, this article provides recommendations about remaining gaps in evidence-based interventions to meet 'real-world prevention needs' and ways to improve prevention targeting and effectiveness. This article recommends strategies to improve the dissemination of DEBI and other evidence-based interventions nationally. [ABSTRACT FROM AUTHOR]