Comparison of Risk Predicted by Multiple Norovirus Dose–Response Models and Implications for Quantitative Microbial Risk Assessment

The application of quantitative microbial risk assessments (QMRAs) to understand and mitigate risks associated with norovirus is increasingly common as there is a high frequency of outbreaks worldwide. A key component of QMRA is the dose–response analysis, which is the mathematical characterization of the association between dose and outcome. For Norovirus, multiple dose–response models are available that assume either a disaggregated or an aggregated intake dose. This work reviewed the dose–response models currently used in QMRA, and compared predicted risks from waterborne exposures (recreational and drinking) using all available dose–response models. The results found that the majority of published QMRAs of norovirus use the ₁F₁ hypergeometric dose–response model with α = 0.04, β = 0.055. This dose–response model predicted relatively high risk estimates compared to other dose–response models for doses in the range of 1–1,000 genomic equivalent copies. The difference in predicted risk among dose–response models was largest for small doses, which has implications for drinking water QMRAs where the concentration of norovirus is low. Based on the review, a set of best practices was proposed to encourage the careful consideration and reporting of important assumptions in the selection and use of dose–response models in QMRA of norovirus. Finally, in the absence of one best norovirus dose–response model, multiple models should be used to provide a range of predicted outcomes for probability of infection.     

Is there gender symmetry in intimate partner violence?

‘Gender symmetry’ is one of the most topical and controversial debates in the contemporary domestic violence literature. National survey data, particularly from the USA, has been utilized to support the concept of gender symmetry of violence between intimate partners. Both these statistics and the reliability of the methodologies used to obtain this data have been the focus of fierce criticism in the domestic violence literature. These debates have spread into the general media and now influence social workers' and students' understanding of violence between intimate partners. Recent work, however, has suggested helpful typologies for a better understanding of intimate partner violence (IPV), and research has explored their validity. A comprehensive understanding of the implications of these debates is important for safe social work interventions as assessments and interventions must be based on an accurate understanding of the aetiology, dynamics and consequences of violence between intimate partners. It is important that practitioners are aware of the background to and complexity of these debates and the ongoing work on typologies of violence, as such understanding will enhance assessments and thereby ensure more appropriate social work interventions. This paper traces the debates and outlines the new developments, which can enhance assessments and understanding of IPV.     

A Simple New Algorithm for Quadratic Programming with Applications in Statistics

Problems involving estimation and inference under linear inequality constraints arise often in statistical modeling. In this article, we propose an algorithm to solve the quadratic programming problem of minimizing for positive definite Q, where is constrained to be in a closed polyhedral convex cone , and the m × n matrix is not necessarily full row rank. The three-step algorithm is intuitive and easy to code. Code is provided in the R programming language.     

Sing … Then Think: Musical Interventions and Nondeliberative Forms of Practice in Social Work Groups

ABSTRACT

The positive effects of music have been demonstrated worldwide in many fields including social work, psychology, medicine, and education. Musical interventions including music listening, lyric analysis, and singing have also been found effective in group work. This article, guided by Norma Lang’s nondeliberative theory, aims to provide the “why,” “when,” and “how” of incorporating music into social work groups. It also provides the reader with a toolbox of musical interventions and the encouragement to utilize these “artful, actional, and analogic” activities in group work.     

Sexual abuse and sexual functioning in a chronic pelvic pain sample

Sexual abuse, particularly childhood sexual abuse, has been linked to chronic pelvic pain and to sexual dysfunction, though the sexual functioning of survivors of sexual abuse has not been studied in a chronic pain population. Sixty-three women with chronic pelvic pain completed measures of sexual function, sexual abuse, and pain. Using an index of the extent of sexual abuse experiences in childhood and adolescence/adulthood, higher scores were related to lower rates of sexual activity, less satisfaction with orgasm and feelings of closeness with sexual partners, and greater severity of and interference from pain. Findings point to the importance of controlling for relationship status in analyses of long-term effects of sexual abuse and of assessing chronic pelvic pain patients for histories of sexual abuse using measures that address the extent or severity of abuse.     

Preference for same-race health care providers and perceptions of interpersonal discrimination in health care

This article examines black Americans' preference for black health care providers. Using data from a national survey, we assess how blacks 'perceptions of discrimination are related to preference for same-race health care providers. Overall, the belief that discrimination is frequent in different-race doctor-patient dyads is associated with greater preference for a same-race provider However; the belief that discrimination occurs regardless of a doctor's race reduces preference for a same-race provider Finally, general perceptions of discrimination are distinct from concerns about personally being treated unfairly, and low personal concern about unfair treatment reduces preference for a same-race provider among those who believe that interpersonal discrimination occurs frequently. These results suggest a complex picture of how perceptions of discrimination influence preferred race of health care provider among blacks in the United States.     

If you feed them, will they come? The use of social marketing to increase interest in attending a college alcohol program

The authors used social marketing to design and test advertisement components aimed at increasing students' interest in attending an alcohol program focused on reaching students who drink heavily, although the authors offered no such program. Participants were undergraduate students in introductory psychology courses (N = 551). Questionnaires included measures assessing demographic information, alcohol use and negative consequences, and interest in attending an alcohol program in response to exposure to 1 of 12 systematically varied advertisements. The authors found that approximately 20% of participants across all ad types indicated some level of interest in attending the alcohol program. Students who use alcohol reported more interest in attending when an informational message was used. Of the participants offered food, 41.9% indicated the food offered in the advertisement impacted their interest in attending. Results suggest market segmentation plays a role in developing effective advertisements to recruit different groups of students based on their reported drinking behavior.