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101.
Harriet Namata Ziv Shkedy Christel Faes Marc Aerts Geert Molenberghs Heide Theeten Pierre Van Damme Philippe Beutels 《Journal of applied statistics》2007,34(8):923-939
Based on sero-prevalence data of rubella, mumps in the UK and varicella in Belgium, we show how the force of infection, the age-specific rate at which susceptible individuals contract infection, can be estimated using generalized linear mixed models (McCulloch & Searle, 2001). Modelling the dependency of the force of infection on age by penalized splines, which involve fixed and random effects, allows us to use generalized linear mixed models techniques to estimate both the cumulative probability of being infected before a given age and the force of infection. Moreover, these models permit an automatic selection of the smoothing parameter. The smoothness of the estimated force of infection can be influenced by the number of knots and the degree of the penalized spline used. To determine these, a different number of knots and different degrees are used and the results are compared to establish this sensitivity. Simulations with a different number of knots and polynomial spline bases of different degrees suggest - for estimating the force of infection from serological data - the use of a quadratic penalized spline based on about 10 knots. 相似文献
102.
Wim Verbeke Filiep Vanhonacker Lynn J. Frewer Isabelle Sioen Stefaan De Henauw John Van Camp 《Risk analysis》2008,28(4):951-967
Communicating about the health effects of fish and seafood may potentially result in a conflict situation: increasing intake is desirable because of health and nutritional benefits, but higher consumption may also lead to an increased intake of potentially harmful environmental contaminants. In order to anticipate the communication challenge this conflict may pose, the research presented here aimed to assess the impact of risk/benefit communication on Belgian consumers' fish consumption behavior and fish attribute perception. Data were collected in June 2005 from a sample of 381 women, aged between 20 and 50 years. An experimental design consisting of four message conditions (benefit‐only; risk‐only; benefit‐risk; and risk‐benefit) combined with three information sources (fish and food industry; consumer organization; government) was used. Exposure to the benefit‐only message resulted in an increase from a self‐reported fish consumption frequency of 4.2 times per month to an intended fish consumption frequency of 5.1 times per month (+21%), while fish attribute perceptions only marginally improved. The risk‐only message resulted in a strong negative perceptual change in the range of two points on a seven‐point scale. This translated into an 8% decrease of behavioral intention (from eating fish 4.5 times per month to an intention of eating fish 4.1 times per month). Balanced messages referring to both risks and benefits yielded no significant change in behavioral intention, despite a significant worsening of fish attribute perception. The presentation order of benefits and risks in the balanced message showed a tendency to affect both behavioral intention and attribute perception, with the first message component being most influential. Information source did not yield any significant impact either on behavioral intention or on attribute perceptions, independent of the message content. The results from this study provide valuable insights for future risk/benefit and balanced communication about seafood. 相似文献
103.
We characterize two different approaches to the idea of equality of opportunity. Roemer’s social ordering is motivated by
a concern to compensate for the effects of certain (non-responsibility) factors on outcomes. Van de gaer’s social ordering
is concerned with the equalization of the opportunity sets to which people have access. We show how different invariance axioms
open the possibility to go beyond the simple additive specification implied by both rules. This offers scope for a broader
interpretation of responsibility-sensitive egalitarianism. 相似文献
104.
Frank Van Holen Johan Vanderfaeillie Femke Vanschoonlandt Skrällan De Maeyer Tim Stroobants 《European Journal of Social Work》2015,18(1):97-113
Family supporting foster care (FSFC) is a directly accessible, short-term and preventive form of foster care for children under the age of 12. Caregivers in this type of foster care need comprehensive support to deal with their complex tasks. In this contribution, the support needs arising from the behaviour of the foster child as well as concerning dealing with the biological parents of 85 Flemish FSFC-parents are examined, as these are areas FSFC-parents specifically ask support for. These support needs are evaluated for possible links with child and foster parent characteristics. More experienced foster parents and foster parents with a foster child showing more externalising problem behaviour ask for more support in managing the child's behaviour. 相似文献
105.
Jay M. Marlowe Cherie Appleton Shirley-Ann Chinnery Sutibra Van Stratum 《Social Work Education》2015,34(1):60-73
How social work students incorporate personal and professional selves in the contexts of field education represents a cornerstone of effective and sustainable practice. This paper presents a qualitative component of a study that tracked 15 third-year bachelor of social work students across their first field placement to document their use of self, critical reflections and experiential learning. The project examined students' assessed ‘use of self’ assignments to understand their capacity for and development of critical awareness across this placement. Students were most articulate in being able to identify stressful situations that arose from placement in terms of what they were thinking (mind) and feeling (emotion) and to a much lesser extent to what they were sensing (body). Over time, students demonstrated a growing critical awareness to better identify and respond to their self-reported tensions. The findings provide developmental insights into how students integrate personal and professional selves and potentially shift from reflective and reflexive practices to incorporating praxis in their work. Through considering the linkages between self and practice, this paper explores student experiences whilst on placement and the associated developmental tasks of critical awareness. 相似文献
106.
Reanalysis of the DEMS Nested Case‐Control Study of Lung Cancer and Diesel Exhaust: Suitability for Quantitative Risk Assessment 下载免费PDF全文
Kenny S. Crump Cynthia Van Landingham Suresh H. Moolgavkar Roger McClellan 《Risk analysis》2015,35(4):676-700
The International Agency for Research on Cancer (IARC) in 2012 upgraded its hazard characterization of diesel engine exhaust (DEE) to “carcinogenic to humans.” The Diesel Exhaust in Miners Study (DEMS) cohort and nested case‐control studies of lung cancer mortality in eight U.S. nonmetal mines were influential in IARC's determination. We conducted a reanalysis of the DEMS case‐control data to evaluate its suitability for quantitative risk assessment (QRA). Our reanalysis used conditional logistic regression and adjusted for cigarette smoking in a manner similar to the original DEMS analysis. However, we included additional estimates of DEE exposure and adjustment for radon exposure. In addition to applying three DEE exposure estimates developed by DEMS, we applied six alternative estimates. Without adjusting for radon, our results were similar to those in the original DEMS analysis: all but one of the nine DEE exposure estimates showed evidence of an association between DEE exposure and lung cancer mortality, with trend slopes differing only by about a factor of two. When exposure to radon was adjusted, the evidence for a DEE effect was greatly diminished, but was still present in some analyses that utilized the three original DEMS DEE exposure estimates. A DEE effect was not observed when the six alternative DEE exposure estimates were utilized and radon was adjusted. No consistent evidence of a DEE effect was found among miners who worked only underground. This article highlights some issues that should be addressed in any use of the DEMS data in developing a QRA for DEE. 相似文献
107.
Socioeconomic Strain,Family Ties,and Adolescent Health in a Rural Northeastern County 总被引:1,自引:0,他引:1 下载免费PDF全文
Karen T. Van Gundy Meghan L. Mills Corinna Jenkins Tucker Cesar J. Rebellon Erin Hiley Sharp Nena F. Stracuzzi 《Rural sociology》2015,80(1):60-85
In adolescence, vital sources of support come from family relationships; however, research that considers the health‐related impact of ties to both parents and siblings is sparse, and the utility of such ties among at‐risk teens is not well understood. Here we use two waves of panel data from the population of 8th and 12th grade students in a geographically isolated, rural, northeastern U.S. county to assess whether socioeconomic status (SES) moderates the effects of parental and sibling attachments on three indicators of adolescent health: obesity, depression, and problem substance use. Our findings indicate that, net of stressful life events, prior health, and sociodemographic controls, increases in parental and sibling attachment correspond with reduced odds of obesity for low‐SES adolescents, reduced odds of depression for high‐SES adolescents, and reduced odds of problem substance use for low‐SES adolescents. Results suggest also that sibling and maternal ties are more influential than paternal ties, at least with regard to the outcomes considered. Overall, the findings highlight the value of strong family ties for the physical, psychological, and behavioral health of socioeconomically strained rural teens, and reveal the explanatory potential of both sibling and parental ties for adolescent health. 相似文献
108.
109.
A Family System Approach to Investigate Family‐Based Pathways Between Financial Stress and Adolescent Problem Behavior 下载免费PDF全文
Koen Ponnet Karla Van Leeuwen Edwin Wouters Dimitri Mortelmans 《Journal of research on adolescence》2015,25(4):765-780
This article proposes a family system approach to improve our understanding on family stress processes. Examining effects within (actor) and between (partner) parents, we explored family‐based pathways through which financial stress is associated with adolescent externalizing problem behavior. Data from 340 families were analyzed, with both parents rating their financial stress and parenting stress, and parents as well as adolescents rating the parent–child communication and adolescent problem behavior. The results revealed that the association between financial stress and adolescent externalizing problem behaviors was mediated by parenting stress and parent–child communication. Although our results provided evidence for both actor and partner effects, actor effects were more prominent. No parent gender differences were found in the strength of the pathways. 相似文献
110.
This paper presents a formal framework that purports to capture some aspects of Kant's theory of freedom. In particular, we argue that the analysis sheds further light on Kant's distinction between a negative and a positive concept of freedom. The paper shows that the two concepts are not equivalent: we not only argue that in a Kantian perspective negative freedom need not entail positive freedom, but also that there are situations in which a person can be said to be positively but not negatively free (in a Kantian sense). 相似文献