Ethics of Population-Based Research

This paper considers the morally relevant ways in which population-based research is a distinct type of human subjects research that have unique moral considerations relevant for public health practitioners and researchers. By defining population-based research, the authors distinguish it from public health practice and then consider, in more detail, the ways in which population-based research differs from clinical human subjects research. Based upon the distinctions between these types of research and practice, they identify five important issues that arise in the design and conduct of certain kinds of population-based research. The authors hope that public health practitioners find these distinctions useful in determining when their work may actually be population-based research and that public health researchers use them to identify the areas where ethical issues in their research may arise.     

Carrie N. Baker (ed): Fighting the US Youth Sex Trade: Gender,Race, and Politics

Journal of Youth and Adolescence -     

Virtual determination of sex: metric and nonmetric traits of the adult pelvis from 3D computed tomography models

Examination of the adult os coxae and sacrum is one of the most common methods of sex estimation from bone. Medical imaging, such as computed tomography (CT), provides the opportunity for three-dimensional (3D) imaging of the skeleton from clinical scans of known individuals in situ. In this study, a randomly selected subset of abdominopelvic CT-derived models were used to evaluate simple, repeatable metric methods of sex estimation based on a combination of obstetric measurements and the traditionally nonmetric Phenice-derived traits. A four-variable discriminant function for sex estimation was developed based on statistical analyses. Overall, the cross-validated accuracy of this method was 100%, with inter-observer error showing an average of only 2.2%. Comparative analysis was run on the data set using FORDISC 3.0. This study shows that current sex determination standards from the pelvis should be updated to include more in vivo data to increase the accuracy of identification.     

An Analysis of Hounsfield Unit Values and Volumetrics from Computerized Tomography of the Proximal Femur for Sex and Age Estimation

Sex and age are two elements in the establishment of a biological profile for forensic identification. While the pelvic bones are the most ideal structures for sex estimation, the condition of a body is not always ideal due to the nature of death, such as in mass disasters, or postmortem processes. This study utilized CT scans and resultant 3D models of 100 male and 100 female adults of known ages ranging from 18 to 98 years old to collect volumetric and Hounsfield unit measurements of the proximal femur. Equations were created to establish logistic regression models for sex estimation and linear regression models for age estimation. The resultant sex estimation method had an accuracy of 93.5% and utilized the volume of the proximal femur. This study provides three linear regression models for age with an accuracy range of 86%–92% ±12 years. As imaging technologies are increasingly adopted for forensic purposes, the power of 3D data will provide the opportunity for more quantitative and reproducible analyses. The proposed method for sex and age estimation provides a reliable tool that can be utilized in both day-to-day casework and disaster victim identification.     

Older women and intimate partner violence: effective interventions

Women above the age of 60 who have experienced intimate partner violence (IPV) have specific needs compared with younger victims. More research is emerging that assists counselors and other helping professionals with identification of these needs and aids to promote the mental health and well-being of this population. Professionals must consider the generational values held by older IPV victims and understand how values may impact decision making. Integrating safety planning and risk assessment into the counseling process is vital. Older IPV victims may seek counseling for posttraumatic stress or depressive symptoms as a result of the abuse. Others may participate in counseling for issues unrelated to IPV. Therefore, a thorough assessment process should include questions related to relationship dynamics so that the counselor has a complete understanding of all factors impacting the client's functioning. Helping professionals must also have an understanding of available community resources, as well as barriers that these clients face as they take steps toward recovery from trauma. This research uses qualitative analysis of case studies to assist helping professionals in understanding the most effective interventions when working with this population.We found that a contextual approach focusing on the restoration of self-confidence is a constructive means of initiating recovery from trauma.     

The use of a 3-D laser scanner to document ephemeral evidence at crime scenes and postmortem examinations

Proper documentation of physical evidence at both crimes scenes and postmortem examination is crucial for downstream analysis, interpretation, and presentation in court. Ephemeral or transient evidence poses particular challenges to investigators, as its very nature renders it difficult or impossible to seize and maintain in its original physical state. The use of a hand-held three-dimensional (3-D) laser scanner is proposed to capture and document such evidence, both in the field and at autopsy. Advantages of the scanner over traditional means of documentation such as photography or casting include the ability to obtain measurements in all dimensions, the ability to reconstruct missing elements, and the ease with which generated images can be interpreted by the jury at trial. Potential scenarios warranting the use of the scanner are identified, and the limitations of its use are discussed.     

A simple method of nose tip shape validation for facial approximation

Despite numerous papers relating to the prediction of nose projection for the purposes of facial approximation, there is little guidance for nose tip shape that has been evaluated on a known data set. This study presents a novel, simple technique for validation of the reconstructed nose tip shape based on methods used in actual approximation practice. The data set was comprised of 25 full-head computed tomography (CT) patient scans. In 22 of the 25 patients across all age and sex groups, when the head is tilted so that soft tissue pronasale is superimposed on hard tissue rhinion, the curvature of the nose tip was found to mimic the curvature of the superior portion of the nasal aperture. This occurs when the head is tilted dorsally by approximately 60° (55.87±5.91). Individuals with snub noses presented a much wider tip curvature. The method was highly repeatable and was evaluated through inter- and intra-observer studies (error=3.15%).     

Morbidity and Mortality Risk Among the “Forgotten Few”: Why Are Girls in the Justice System in Such Poor Health?

The present study assessed the physical health of a population of girls sentenced to custody in a large US State via medical examinations and clinical assessments in adolescence and young adulthood. Findings indicated that injuries, obesity, and sexually transmitted diseases were the norm, with over 50% of the population meeting criteria for each of these health problems. A dose–response relationship was documented between childhood victimization and injuries and injury risk in adolescence and self-harm, HIV risk, physical health symptoms, and hospitalizations in young adulthood. The relationship between childhood victimization and poor adult physical health was fully mediated by health-risk behaviors in adolescence. Clinical and policy implications of the high mortality and morbidity risk among female juvenile offenders are discussed.