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151.
Statistical modeling for Bayesian extrapolation of adult clinical trial information in pediatric drug evaluation 下载免费PDF全文
Margaret Gamalo‐Siebers Jasmina Savic Cynthia Basu Xin Zhao Mathangi Gopalakrishnan Aijun Gao Guochen Song Simin Baygani Laura Thompson H. Amy Xia Karen Price Ram Tiwari Bradley P. Carlin 《Pharmaceutical statistics》2017,16(4):232-249
Children represent a large underserved population of “therapeutic orphans,” as an estimated 80% of children are treated off‐label. However, pediatric drug development often faces substantial challenges, including economic, logistical, technical, and ethical barriers, among others. Among many efforts trying to remove these barriers, increased recent attention has been paid to extrapolation; that is, the leveraging of available data from adults or older age groups to draw conclusions for the pediatric population. The Bayesian statistical paradigm is natural in this setting, as it permits the combining (or “borrowing”) of information across disparate sources, such as the adult and pediatric data. In this paper, authored by the pediatric subteam of the Drug Information Association Bayesian Scientific Working Group and Adaptive Design Working Group, we develop, illustrate, and provide suggestions on Bayesian statistical methods that could be used to design improved pediatric development programs that use all available information in the most efficient manner. A variety of relevant Bayesian approaches are described, several of which are illustrated through 2 case studies: extrapolating adult efficacy data to expand the labeling for Remicade to include pediatric ulcerative colitis and extrapolating adult exposure‐response information for antiepileptic drugs to pediatrics. 相似文献
152.
Inequality in Social Insurance Participation and Generosity: Do Firm Characteristics Matter? 下载免费PDF全文
Income inequality in China has been much documented and debated. However, one important aspect of income inequality – social insurance inequality – has been largely understudied. We use a large national panel of firm data to examine the possible influence of various firm characteristics on the inequalities in social insurance participation and generosity in the period 2004–07. Our findings reveal substantial ownership sector and regional gaps in social insurance provision by firms, with the private domestic sector and those in the central region lagging behind. Unionized firms, larger firms, and firms with greater market shares also tend to provide better social insurance to their employees. While being an exporting firm is linked with greater social insurance participation and generosity, being a purely exporting firm, however, is associated with reduced social insurance generosity. Lastly, highly educated workers receive substantially better social insurance coverage than their less educated peers. These social insurance inequalities are highly relevant as China pushes forward with establishing a unified social insurance system across urban‐rural boundaries, ownership sectors and industries. 相似文献
153.
154.
Control‐based imputation for sensitivity analyses in informative censoring for recurrent event data 下载免费PDF全文
Fei Gao Guanghan F. Liu Donglin Zeng Lei Xu Bridget Lin Guoqing Diao Gregory Golm Joseph F. Heyse Joseph G. Ibrahim 《Pharmaceutical statistics》2017,16(6):424-432
In clinical trials, missing data commonly arise through nonadherence to the randomized treatment or to study procedure. For trials in which recurrent event endpoints are of interests, conventional analyses using the proportional intensity model or the count model assume that the data are missing at random, which cannot be tested using the observed data alone. Thus, sensitivity analyses are recommended. We implement the control‐based multiple imputation as sensitivity analyses for the recurrent event data. We model the recurrent event using a piecewise exponential proportional intensity model with frailty and sample the parameters from the posterior distribution. We impute the number of events after dropped out and correct the variance estimation using a bootstrap procedure. We apply the method to an application of sitagliptin study. 相似文献
155.
Xuesong Gao 《Chinese Journal of Communication》2017,10(2):157-175
This article examines the Chinese government’s use of the print media to justify the national language policy and address individuals’ concerns about the vitality of regional varieties of the Chinese language (i.e., Cantonese) in its coverage of the Protecting Cantonese Movement (July 2010) in Guangzhou. The analysis revealed that the Chinese government adopted a relatively reconciliatory response to the Movement, which apparently contested the relevant language policy. However, the media texts maintained the national policy of promoting Putonghua as inviolable, whereas they assigned Cantonese the role of the carrier of cultural tradition and stressed that the rise or fall of particular regional language depended on regional socioeconomic developments. Such media discussions showed that the state carefully managed relevant discussions about the vitality of regional Chinese varieties within the discursive space defined by legalistic, cultural, and socioeconomic development discourses. These discursive boundaries reflect the dominance of linguistic instrumentalism in the Chinese government’s language policymaking. 相似文献
156.
农村留守老人的供养制度主要包括以种植或养殖为基础的自我供养、以晚辈支撑为基础的后代供养和以福利支持为基础的社会供养.对中国留守老人而言,“居家养老”仍会是未来一段时间符合乡村现实的养老方式.目前,“居家养老”所依靠的自我供养和后代供养逐渐呈现衰微的趋势,社会供养也十分有限.文章通过对留守老人社会角色的重新认知,可以发现他们并非“废弃的生命”,而是乡村重要的根基.立基于留守老人生命价值的供养制度应当包含:基于“分享”理念的福利制度,使留守老人从社会财富中分得应有份额;基于“大健康”理念的医疗制度,对留守老人的健康进行防微杜渐式关照;以“自下而上”理念为基础的文化制度,使留守老人真正获得精神喜乐. 相似文献
157.
社会发展、学校改革、家庭贫困、个人原因等使大学生兼职由非主流化走向主流化,甚至庸俗化。大学生兼职的动机由锻炼自己变为养活自己,在社会贬低大学生与大学生自我贬低的双重打压下,大学生兼职主流化、庸俗化不可避免,这要求社会、学校与家庭认真对待大学生兼职主流化、庸俗化问题,积极引导大学生兼职,防止因为兼职所带来的负面影响制约大学生成长与进步。 相似文献
158.
在全国文化消费方兴未艾的背景下,上海文化消费尤为繁盛。在载体方面,创新与多元化趋势增强。由政府主导的基础型公共文化服务体系进一步完善,消费产品更加多样化,但仍存在公共文化机构数量不足、消费理念薄弱等问题。电影节、书展、动漫节、艺术节、艺博会五大节庆类公共文化平台在消费产品多元化、亲民化、国际化方面的趋势更加明显。新媒体作为市场主导的自主型文化消费载体,发展迅猛。网购、APP、微博经济、网络文学消费稳步增长。在客体方面,假日旅游和出境游消费火爆,私人影院等体验式消费备受青睐,演艺、奢侈品消费呈爆发式增长。在主体方面,上海已形成高、中、低3类消费主体并存的文化消费格局,阶层化倾向日趋明显。 相似文献
159.
"80后"小说是复杂的文学现象,贡献突出,局限也十分明显。其突出的贡献在于提供了一种成熟的"青春文学",扩大了读者群,丰富了中国当代文学的质素。"80后"小说形成了自己的审美特色,对传统的美学范畴有所丰富和发展,在叙事、虚构、想象、语言方面尤具特色。"80后"小说也存在众多问题,在内容上表现为思想深度不够、价值观迷茫、道德感缺失、社会责任感不强等,在形式上表现为作文痕迹过重、"学习"特点明显、继承与革新之间的关系处理不当、存在普遍模仿甚至抄袭的现象等。"80后"小说家要担当起时代和民族文学的大任,应在创作上扬长避短。 相似文献
160.