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Leukemia Risk Associated with Benzene Exposure in the Pliofilm Cohort. II. Risk Estimates 总被引:3,自引:0,他引:3
Mary B. Paxton Vernon M. Chinchilli Susan M. Brett Joseph V. Rodricks 《Risk analysis》1994,14(2):155-161
The detailed work histories of the individual workers composing the Pliofilm cohort represent a unique resource for estimating the dose-respoonse for leukemia that may follow occupational exposure to benzene. In this paper, we report the results of analyzing the updated Pliofilm cohort using the proportional hazards model, a more sophisticated technique that uses more of the available exposure data than the conditional logistic model used by Rinsky et al. The more rigorously defined exposure estimates derived by Paustenbach et al. are consistent with those of Crump and Allen in giving estimates of the slope of the leukemogenic dose-response that are not as steep as the slope resulting from the exposure estimates of Rinsky et al. We consider estimates of 0.3-0.5 additional leukemia deaths per thousand workers with 45 ppm-years of cumulative benzene exposure to be the best estimates currently available of leukemia risk from occupational exposure to benzene. These risks were estimated in the proportional hazards model when the exposure estimates of Crump and Allen or of Paustenbach et al. were used to derive a cumulative concentration-by-time metric. 相似文献
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Social norms-based interventions targeting college student drinking behaviors have become increasingly popular. Such interventions purportedly modify student misperceptions of fellow student drinking behaviors, which leads to changes in individual drinking behavior. Despite claims of successful interventions, research demonstrating that social norms-based interventions modify student perceptions is lacking. OBJECTIVE: The authors conducted a laboratory experiment examining the feasibility of this mechanism of action and aimed to determine the validity of the campus-specific drinking norms hypothesis. PARTICIPANTS AND METHODS: The authors randomly assigned 60 students to 1 of 3 research conditions: Alcohol 101 (national drinking norms), a didactic presentation of campus specific drinking norms, or a control condition. RESULTS: Both intervention groups modified student misperceptions regarding peer alcohol use, and these changes were sustained 1 week later. CONCLUSIONS: Social norms-based interventions can contribute to more accurate drinking perceptions among college students. 相似文献
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Brett Lehman 《Sociological inquiry》2019,89(3):532-555
Scholars and educators study how the school climate influences aggressive behaviors like bullying. Far less research examines the relationship between school climate and hateful actions. This study addresses that gap by examining students’ perceptions and observations of the school climate with a nationally representative sample of U.S. middle and high school students. These data include reports of hateful verbal victimization and observations of hateful words and symbols. While some speculate that bullying and hate are separate phenomena, results indicate that school climates which reduce bullying victimization also reduce this study's measures of hate. One difference is that the presence of security guards or police has no effect on bullying victimization while it is associated with increased reports of hateful incidents. The results are interpreted in light of current efforts to reduce school violence and concerns over the role of harsh punishment and law enforcement in school. While one cannot conclude that bullying and hate are empirically distinct from these findings, they point to strategies to combine formal social control and efforts to improve school climate through forming positive social bonds between students and authority figures. This can keep students safe from both violence and hate. 相似文献
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David Abbott John Carpenter Barbara E. Gibson Jon Hastie Marcus Jepson Brett Smith 《Disability & Society》2019,34(5):683-703
Disability is often portrayed as a one-dimensional category devoid of further intersections. Work which has addressed the intersection of disability and male gender has rarely considered different types of disability or impairment, or foregrounded the experiences of disabled men themselves. This article is based on empirical work carried out in England with men who have Duchenne muscular dystrophy (DMD). We explored with participants their sense of themselves as men and their commonalities and differences with other men. Findings suggest that men with DMD claim, reject and redefine what it meant to them to be men. Doing gender was often heavily reliant on the availability and permission of others. Our study highlights the usefulness of exploring gender with men with particular experiences of disability and of looking at how this might change over a life course, especially when the nature and extent of the life course is a precarious one. 相似文献
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Samuel K. Shultz Martha Shaw Brett McCormick Jeff Allen Donald W. Black 《Journal of gambling studies / co-sponsored by the National Council on Problem Gambling and Institute for the Study of Gambling and Commercial Gaming》2016,32(3):877-887
This study investigates the characteristics of individuals with DSM-IV pathological gambling (PG) who experienced childhood maltreatment and rates of maltreatment occurring in their first-degree relatives (FDRs). 94 subjects with DSM-IV PG, 91 controls, and 312 FDRs were assessed for childhood maltreatment as part of a family study of PG. Maltreatment was evaluated using the Revised Childhood Experiences Questionnaire. The Family Assessment Device was used to evaluate the functionality of the PG subject’s (or control’s) family of origin. Data were analyzed using logistic regression by the method of generalized estimating equations. Rates of maltreatment were significantly higher in subjects with PG than controls (61 vs. 25 %, P < 0.001). Subjects with PG who experienced maltreatment were more likely to be female, had more severe PG symptoms, had co-occurring mood and anxiety disorders, and reported greater early family life dysfunction than those with PG who did not experience maltreatment. Rates of maltreatment were higher in FDRs of PG subjects than controls (41 vs. 24 %, P = .002). Rates in FDRs of individuals with PG who experienced maltreatment themselves were still higher that in FDRs of those with PG who did not experience maltreatment (50 vs. 28 %, P = .009). The former were also more likely to have anxiety disorders, substance use disorders, and suicide attempts. The results suggest that childhood maltreatment in persons with PG is common and intergenerational. Rates of maltreatment in FDRs of PG subjects are high, particularly among those who experienced abuse. The implications of the findings are discussed. 相似文献
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Brett Caraway 《Information, Communication & Society》2016,19(7):907-920
This article analyzes communication practices within networked social movements by exploring the network structure of an organization responsible for numerous labor actions and campaigns targeting the retail giant Walmart. This case study of the Organization United for Respect at Walmart (OUR Walmart) represents an initial attempt to map the network structure of an emergent form of labor organization. To better understand the relationship between communication and collective action, I utilize Bennett and Segerberg's [(2012). The logic of connective action: Digital media and the personalization of contentious politics. Information, Communication & Society, 15(5), 29] model of connective action to examine the organizational structure of OUR Walmart. I conducted semi-structured interviews with a dozen union representatives, OUR Walmart members, and current and former Walmart employees. My intention is to (1) delineate the network structure of a new and significant organizational form of class struggle and (2) consider the utility and validity of the logic of connective action. I conclude with a consideration of the limitations and affordances of the network structure of OUR Walmart for workers engaged in struggles for better working conditions and higher wages. This research finds support for Bennett and Segerberg's model of large-scale action networks. Moreover, this research suggests that organizationally enabled networks are an effective means of coordinating class struggle. 相似文献
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