Associations between physical activity and other health behaviors in a representative sample of US adolescents

OBJECTIVES This study examined the associations between physical activity and other health behaviors in a representative sample of US adolescents. METHODS In the 1990 Youth Risk Behavior Survey, 11631 high school students provided information on physical activity; diet; substance use; and other negative health behaviors. Logistic regression analyses examined associations between physical activity and other health behaviors in a subset of 2652 high-active and 1641 low-active students. RESULTS Low activity was associated with cigarette smoking, marijuana use, lower fruit and vegetable consumption, greater television watching, failure to wear a seat belt, and low perception of academic performance. For consumption of fruit, television watching, and alcohol consumption, significant interactions were found with race/ethnicity or sex, suggesting that sociocultural factors may affect the relationships between physical activity and some health behaviors. CONCLUSIONS Low physical activity was associated with several other negative health behaviors in teenagers. Future studies should examine whether interventions for increasing physical activity in youth can be effective in reducing negative health behaviors.

Physical activity correlates in adolescent girls who differ by weight status

Objective This study compared correlates of physical activity (PA) among African-American and white girls of different weight groups to guide future interventions. Research Methods and Procedures Participants were 1015 girls (mean age, 14.6 years; 45% African-American) from 12 high schools in South Carolina who served as control subjects for a school-based intervention. Post-intervention measures obtained at the end of ninth grade were used. PA was measured using the Three-Day PA Recall, and a questionnaire measured social-cognitive and environmental variables thought to mediate PA. Height and weight were measured, and BMI was calculated. Girls were stratified by race and categorized into three groups, based on BMI percentiles for girls from CDC growth charts: normal (BMI < 85th percentile), at risk (BMI, 85th to 94th percentile), and overweight (BMI ≥ 95th percentile). Girls were further divided into active and low-active groups, based on a vigorous PA standard (average of one or more 30-minute blocks per day per 3-day period). Mixed-model ANOVA was used to compare factors among groups, treating school as a random effect Results None of the social-cognitive or environmental variables differed by weight status for African-American or white girls. Perceived behavioral control and sports team participation were significantly higher in girls who were more active, regardless of weight or race group. In general, social-cognitive variables seem to be more related to activity in white girls, whereas environmental factors seem more related to activity in African-American girls. Discussion PA interventions should be tailored to the unique needs of girls based on PA levels and race, rather than on weight status alone.

Physical activities and sedentary pursuits in African American and Caucasian girls

The purposes of this study were to describe and compare the specific physical activity choices and sedentary pursuits of African American and Caucasian American girls. Participants were 1,124 African American and 1,068 Caucasian American eighth grade students from 31 middle schools. The 3-Day Physical Activity Recall (3DPAR) was used to measure participation in physical activities and sedentary pursuits. The most frequently reported physical activities were walking, basketball, jogging or running, bicycling, and social dancing. Differences between groups were found in 11 physical activities and 3 sedentary pursuits. Participation rates were higher in African American girls (p<.001)for social dancing, basketball, watching television, and church attendance but lower in calisthenics, ballet and other dance, jogging or running, rollerblading, soccer, softball or baseball, using an exercise machine, swimming, and homework. Cultural differences of groups should be considered when planning interventions to promote physical activity.

Predictive validity of accelerometer prediction equations for energy expenditure (EE) during overland walking and running in children and adolescents

Purpose The aim of this study was to assess the predictive validity of three accelerometer prediction equations (Freedson et aL, 1997; Trost et aL, 1998; Puyau et al., 2002) for energy expenditure (EE) during overland walking and running in children and adolescents. Methods 45 healthy children and adolescents aged 10-18 completed the following protocol, each task 5-mins in duration, with a 5-min rest period in between; walking normally; walking briskly; running easily and running fast. During each task participants wore MTI (WAM 7164) Actigraphs on the left and right hips. VO2 was monitored breath by breath using the Cosmed K4b2 portable indirect calorimetry system. For each prediction equation, difference scores were calculated as EE measured minus EE predicted. The percentage of 1-min epochs correctly categorized as light (<3 METs), moderate (3-5.9 METs), and vigorous (≥6 METS) was also calculated. Results The Freedson and Trost equations consistently overestimated MET level. The level of overestimation was statistically significant across all tasks for the Freedson equation, and was significant for only the walking tasks for the Trost equation. The Puyau equation consistently underestimated AEE with the exception of the walking normally task. In terms of categorisation, the Freedson equation (72.8% agreement) demonstrated better agreement than the Puyau (60.6%). Conclusions These data suggest that the three accelerometer prediction equations do not accurately predict EE on a minute-by-minute basis in children and adolescents during overland walking and running. However, the cut points generated by these equations maybe useful for classifying activity as either, light, moderate, or vigorous.

The educational pipeline for health care professionals : understanding the source of racial differences

The underrepresentation of blacks in the healthcare professions may have direct implications for the health outcomes of minority patients, underscoring the importance of understanding movement through the educational pipeline into professional healthcare careers by race. We jointly model individuals' postsecondary decisions including enrollment, college type, degree completion, and choosing a healthcare occupation requiring an advanced degree. We estimate the parameters of the model with maximum likelihood using data from the NLS-72. Our results emphasize the importance of pre-collegiate factors and of jointly examining the full chain of educational decisions in understanding the sources of racial disparities in professional healthcare occupations.

Survival models of community tenure and length of hospital stay for the seriously mentally ill : a 10-year perspective

Objective: To examine the effects of personal and community characteristics, specifically race and rurality, on lengths of state psychiatric hospital and community stays using maximum likelihood survival analysis with a special emphasis on change over a ten year period of time. Data Sources: We used the administrative data of the Virginia Department of Mental Health, Mental Retardation, and Substance Abuse Services (DMHMRSAS) from 1982-1991 and the Area Resources File (ARF). Given these two sources, we constructed a history file for each individual who entered the state psychiatric system over the ten year period. Histories included demographic, treatment, and community characteristics. Study Design: We used a longitudinal, population-based design with maximum likelihood estimation of survival models. We presented a random effects model with unobserved heterogeneity that was independent of observed covariates. The key dependent variables were lengths of inpatient stay and subsequent length of community stay. Explanatory variables measured personal, diagnostic, and community characteristics, as well as controls for calendar time. Data Collection: This study used secondary, administrative, and health planning data. Principal Findings: African-American clients leave the community more quickly than whites. After controlling for other characteristics, however, race does not affect hospital length of stay. Rurality does not affect length of community stays once other personal and community characteristics are controlled for. However, people from rural areas have longer hospital stays even after controlling for personal and community characteristics. The effects of time are significantly smaller than expected. Diagnostic composition effects and a decrease in the rate of first inpatient admissions explain part of this reduced impact of time. We also find strong evidence for the existence of unobserved heterogeneity in both types of stays and adjust for this in our final models. Conclusions: Our results show that information on client characteristics available from inpatient stay records is useful in predicting not only the length of inpatient stay but also the length of the subsequent community stay. This information can be used to target increased discharge planning for those at risk of more rapid readmission to inpatient care. Correlation across observed and unobserved factors affecting length of stay has significant effects on the measurement of relationships between individual factors and lengths of stay. Thus, it is important to control for both observed and unobserved factors in estimation.

Understanding and analyzing a large collection of archived swimming videos

In elite sports, nearly all performances are captured on video. Despite the massive amounts of video that has been captured in this domain over the last 10-15 years, most of it remains in an 'unstructured' or 'raw' form, meaning it can only be viewed or manually annotated/tagged with higher-level event labels which is time consuming and subjective. As such, depending on the detail or depth of annotation, the value of the collected repositories of archived data is minimal as it does not lend itself to large-scale analysis and retrieval. One such example is swimming, where each race of a swimmer is captured on a camcorder and in-addition to the split-times (i.e., the time it takes for each lap), stroke rate and stroke-lengths are manually annotated. In this paper, we propose a vision-based system which effectively 'digitizes' a large collection of archived swimming races by estimating the location of the swimmer in each frame, as well as detecting the stroke rate. As the videos are captured from moving hand-held cameras which are located at different positions and angles, we show our hierarchical-based approach to tracking the swimmer and their different parts is robust to these issues and allows us to accurately estimate the swimmer location and stroke rates.

Catch limits, capacity utilization and cost reduction in Japanese fishery management

Japan's fishery harvest peaked in the late 1980s. To limit the race for fish, each fisherman could be provided with specific catch limits in the form of individual transferable quotas (ITQs). The market for ITQs would also help remove the most inefficient fishers. In this article we estimate the potential cost reduction associated with catch limits, and find that about 300 billion yen or about 3 billion dollars could be saved through the allocation and trading of individual-specific catch shares.

Women and ADR

Alternative dispute resolution, or ‘ADR’, is defined by the National Alternative Dispute Resolution Advisory Council as: … an umbrella term for processes, other than judicial determination, in which an impartial person assists those in a dispute to resolve the issues between them. ADR is commonly used as an abbreviation for alternative dispute resolution, but can also be used to mean assisted or appropriate dispute resolution. Some also use the term ADR to include approaches that enable parties to prevent or manage their own disputes without outside assistance. A broad range of ADR processes are used in legal practice contexts, including, for example, arbitration, conciliation, mediation, negotiation, conferencing, case appraisal and neutral evaluation. Hybrid processes are also used, such as med-arb in which the practitioner starts by using mediation, and then shifts to using arbitration. ADR processes generally fall into one of three general categories: facilitative, advisory or determinative. In a facilitative process, the ADR practitioner has the role of assisting the parties to reach a mutually agreeable outcome to the dispute by helping them to identify the issues in dispute, and to develop a range of options for resolving the dispute. Mediation and facilitated negotiation are examples of facilitative processes. ADR processes that are advisory involve the practitioner appraising the dispute, providing advice as to the facts of the dispute, the law and then, in some cases, articulating possible or appropriate outcomes and how they might be achieved. Case appraisal and neutral evaluation are examples of advisory processes. In a determinative ADR process, the practitioner evaluates the dispute (which may include the hearing of formal evidence from the parties) and makes a determination. Arbitration is an example of a determinative ADR process. The use of ADR processes has increased significantly in recent years. Indeed, in a range of contemporary legal contexts the use of an ADR process is now required before a party is able to file a matter in court. For example, Juliet Behrens discusses in Chapter 11 of this book how the Family Law Act 1975 (Cth) now effectively mandates attendance at pre-filing family dispute resolution in parenting disputes. At the state level, in Queensland, for example, attendance at a conciliation conference can be required in anti-discrimination matters, and is encouraged in residential tenancy matters, and in personal injuries matters the parties must attend a preliminary compulsory conference. Certain ADR processes are used more commonly in the resolution of particular disputes. For example, in family law contexts, mediation and conciliation are generally used because they provide the parties with flexibility in terms of process and outcome while still ensuring that the negotiations occur in a positive, structured and facilitated framework. In commercial contexts, arbitration and neutral evaluation are often used because they can provide the parties with a determination of the dispute that is factually and legally principled, but which is also private and more timely than if the parties went to court. Women, as legal personalities and citizens of society, can find themselves involved in any sort of legal dispute, and therefore all forms of ADR are relevant to women. Perhaps most commonly, however, women come into contact with facilitative ADR processes. For example, through involvement in family law disputes women will encounter family dispute resolution processes, such as mediation. In this chapter, therefore, the focus is on facilitative ADR processes and, particularly, issues for women in terms of their participation in such processes. The aim of this chapter is to provide legal practitioners with an understanding of issues for women in ADR to inform your approach to representing women clients in such processes, and to guide you in preparing women clients for their participation in ADR. The chapter begins with a consideration of the ways in which facilitative ADR processes are positive for women participants. Next, some of the disadvantages for women in ADR are explored. Finally, the chapter offers ways in which legal practitioners can effectively prepare women clients for participation in ADR. Before embarking on a discussion of issues for women in ADR, it is important to acknowledge that women’s experiences in these dispute resolution environments, whilst often sharing commonalities, are diverse and informed by a range of factors specific to each individual woman; for example, her race or socio-economic background. This discussion, therefore, addresses some common issues for women in ADR that are fundamentally gender based. It must be noted, however, that providing advice to women clients about participating in ADR processes requires legal practitioners to have a very good understanding of the client as an individual, and her particular needs and interests. Some sources of diversity are discussed in Chapters 13, 14 and 15.

Drinking games participation among female students at a regional Australian university

Participation in drinking games (DGs) by university students is often associated with heavy drinking and negative social and health impacts. Although research in Australia indicates that university students tend to drink at risky levels, there is paucity of literature on DGs among students, especially those residing at regional universities. This research examined drinking among female college students of white background. Eighteen female students participated in face-to-face in-depth interviews to describe their DG experiences. Most women played DGs for social and monetary reasons, with many drinking high volumes of alcohol during the game. Excessive drinking was linked with the type of beverage consumed. Despite knowing the health risks associated with DGs, there was a strong social imperative for these young women to play these games. Research and public health initiatives to better understand and address problematic drinking activities in rural and regional Australia have tended to ignore women and the dominant white populations whose heavy drinking has been largely restricted to private spheres.

Intersectionality, rural criminology, and re-imaging the boundaries of critical criminology

One of the significant shortcomings of the criminological canon, including its critical strands – feminist, cultural and green – has been its urbancentric bias. In this theoretical model, rural communities are idealised as conforming to the typical small-scale traditional societies based on cohesive organic forms of solidarity and close density acquaintance networks. This article challenges the myth that rural communities are relatively crime free places of ‘moral virtue’ with no need for a closer scrutiny of rural context, rural places, and rural peoples about crime and other social problems. This challenge is likewise woven into the conceptual and empirical narratives of the other articles in this Special Edition, which we argue constitute an important body of innovative work, not just for reinvigorating debates in rural criminology, but also critical criminology. For without a critical perspective of place, the realities of context are too easily overlooked. A new criminology of crime and place will help keep both critical criminology and rural criminology firmly anchored in the sociological and the criminological imagination. We argue that intersectionality, a framework that resists privileging any particular social structural category of analysis, but is cognisant of the power effects of colonialism, class, race and gender, can provide the theoretical scaffolding to further develop such a project.

Prevalence and visual risk factors for falls in bilateral cataract patients in Ho Chi Minh City, Vietnam

Purpose To determine the prevalence of falls in the 12 months prior to cataract surgery and examine the associations between visual and other risk factors and falls among older bilateral cataract patients in Vietnam. Methods Data collected from 413 patients in the week before scheduled cataract surgery included a questionnaire and three objective visual tests. Results The outcome of interest was self-reported falls in the previous 12 months. A total of 13% (n = 53) of bilateral cataract patients reported 60 falls within the previous 12 months. After adjusting for age, sex, race, employment status, comorbidities, medication usage, refractive management, living status and the three objective visual tests in the worse eye, women (odds ratio, OR, 4.64, 95% confidence interval, CI, 1.85–11.66), and those who lived alone (OR 4.51, 95% CI 1.44–14.14) were at increased risk of a fall. Those who reported a comorbidity were at decreased risk of a fall (OR 0.43, 95% CI 0.19–0.95). Contrast sensitivity (OR 0.31, 95% CI 0.10–0.95) was the only significant visual test associated with a fall. These results were similar for the better eye, except the presence of a comorbidity was not significant (OR 0.45, 95% CI 0.20–1.02). Again, contrast sensitivity was the only significant visual factor associated with a fall (OR 0.15, 95% CI 0.04–0.53). Conclusion Bilateral cataract patients in Vietnam are potentially at high risk of falls and in need of falls prevention interventions. It may also be important for ophthalmologists and health professionals to consider contrast sensitivity measures when prioritizing cataract patients for surgery and assessing their risk of falls.

The plasticity of NBS resistance genes in sorghum is driven by multiple evolutionary processes

Background Increased disease resistance is a key target of cereal breeding programs, with disease outbreaks continuing to threaten global food production, particularly in Africa. Of the disease resistance gene families, the nucleotide-binding site plus leucine-rich repeat (NBS-LRR) family is the most prevalent and ancient and is also one of the largest gene families known in plants. The sequence diversity in NBS-encoding genes was explored in sorghum, a critical food staple in Africa, with comparisons to rice and maize and with comparisons to fungal pathogen resistance QTL. Results In sorghum, NBS-encoding genes had significantly higher diversity in comparison to non NBS-encoding genes and were significantly enriched in regions of the genome under purifying and balancing selection, both through domestication and improvement. Ancestral genes, pre-dating species divergence, were more abundant in regions with signatures of selection than in regions not under selection. Sorghum NBS-encoding genes were also significantly enriched in the regions of the genome containing fungal pathogen disease resistance QTL; with the diversity of the NBS-encoding genes influenced by the type of co-locating biotic stress resistance QTL. Conclusions NBS-encoding genes are under strong selection pressure in sorghum, through the contrasting evolutionary processes of purifying and balancing selection. Such contrasting evolutionary processes have impacted ancestral genes more than species-specific genes. Fungal disease resistance hot-spots in the genome, with resistance against multiple pathogens, provides further insight into the mechanisms that cereals use in the “arms race��� with rapidly evolving pathogens in addition to providing plant breeders with selection targets for fast-tracking the development of high performing varieties with more durable pathogen resistance.

New pleasures and old dangers: reinventing male sex work

Understandings of male sex workers (MSWs) shift with technological, conceptual, and social changes. Research has historically constructed MSWs as psychologically unstable, desperate, or destitute victims and their clients as socially deviant perverts. These perceptions, however, are no longer supported by contemporary research and changing societal perceptions of the sex industry, challenging how we understand and describe “escorts.” The changing understandings of sexuality and the increasing power of the Internet are both important forces behind recent changes in the structure and organization of MSWs. The growth in the visibility and reach of escorts has created opportunities to form an occupational account of MSWs that better accounts for the dynamic and diverse nature of the MSW experience in the early 21st century. Recent changes in the structure and organization of male sex work have provided visibility to the increasingly diverse geographical distribution of MSW, the commodification of race and racialized desire, new populations of heterosexual men and women as clients, and the successful dissemination of safer sexual messages to MSWs through online channels. This article provides a broad overview of the literature on MSWs, concentrating its focus on studies that have emerged over the past 20 years and identifying areas for future research.

Think Sociology

Contents: 1. SOCIOLOGY: An Introduction to the Sociological Imagination. John Carl, Sarah Baker 2. SOCIOLOGICAL THEORY: An Introduction to the Theoretical Foundations of Sociology. John Carl, Sarah Baker 3. SOCIAL CLASS IN AUSTRALIA: Stratification in a Modern Society. John Carl, John Scott 4. RACE AND ETHNIC STRATIFICATION: Is it a Question of Colour? John Carl, John Scott 5. SEX AND GENDER: The Social Side of Sex. John Carl, Wendy Hillman 6. AGE AND AGEING: The Greying of Society. John Carl, Sarah Baker 7. CRIME AND THE LEGAL SYSTEM: How Do Societies Respond to Crime and Deviance? John Carl, John Scott 8. EDUCATION AND EMPLOYMENT: From the Classroom to the Workforce. John Carl, Sarah Baker and Brady Robards 9: MARRIAGE AND FAMILY: How Do Societies Perpetuate Themselves? John Carl, Wendy Hillman 10. THE BODY, HEALTH AND ILLNESS: A Weight on Australia’s Shoulder. John Carl, John Scott 11. GLOBALISATION: The Economy and Society. John Carl, Geoffrey Lawrence 12. CULTURE: A Framework for the Individual. John Carl, Sarah Baker and Brady Robards 13. RELIGION: Is Society Losing Faith? John Carl, Sarah Baker and Brady Robards 14. ENVIRONMENTAL SUSTAINABILITY AND SOCIAL MOVEMENTS: How Do Societies Connect with Nature? John Carl, Geoffrey Lawrence 15. SOCIOLOGICAL RESEARCH: How Do We Learn about Society? John Carl, Wendy Hillman