Marginal methods for clustered longitudinal binary data with incomplete covariates

Many analyses for incomplete longitudinal data are directed to examining the impact of covariates on the marginal mean responses. We consider the setting in which longitudinal responses are collected from individuals nested within clusters. We discuss methods for assessing covariate effects on the mean and association parameters when covariates are incompletely observed. Weighted first and second order estimating equations are constructed to obtain consistent estimates of mean and association parameters when covariates are missing at random. Empirical studies demonstrate that estimators from the proposed method have negligible finite sample biases in moderate samples. An application to the National Alzheimer's Coordinating Center (NACC) Uniform Data Set (UDS) demonstrates the utility of the proposed method.     

生态投资柳暗花明——绿色能源堪比当年的网络通信技术

近年来,非传统能源（如风能、太阳能等）工业得到了繁荣发展。但随着金融危机的加剧,全球经济持续低迷,股票市场动荡不安,原本被普遍看好的非传统能源股也难逃跌价的厄运。那么,当前的市场环境究竟会对生态投资领域造成怎样的影响呢？     

Comparisons of Gambling and Alcohol Use Among College Students and Noncollege Young People in the United States

Abstract

Objective: Gambling and alcohol use were compared for college and noncollege young adults in the US population. Participants: Participants were 1,000 respondents aged 18 to 21. Methods: Data were analyzed from a representative household sample of US young people aged 14 to 21 years old. Telephone interviews were conducted between August 2005 and January 2007. Results: After taking into account gender, age, race/ethnicity, and socioeconomic status, college student status did not predict gambling, frequent gambling, or problem gambling. In contrast, being a college student was associated with higher levels of alcohol use and problem drinking. Being male was the strongest predictor of both problem gambling and problem drinking. Blacks were less likely than whites to drink heavily; yet they were more likely than whites to gamble heavily. Conclusion: Young males should be targeted for prevention and intervention efforts for both problem gambling and problem drinking regardless of college student status.     

Physical Activity,Exercise, and Sedentary Behavior in College Students

Abstract

Objective: This article examines students’ perceptions of individual and institutional responsibility for sexual health so that institutions can better provide for the needs of their students to increase academic success and healthy relationship outcomes. Participants: Students from 2- and 4-year colleges in 1 state (N = 78). Methods: From May through November 2010, the authors used go-along interviews to examine students’ perceptions of resources for sexual health on their campuses. Results: Participants believed that it is the college's responsibility to provide resources and the responsibility of students to access resources. Participants at 2-year schools wanted referrals to resources, whereas participants at 4-year schools expected resources to be available and emphasized the importance of a supportive community. Conclusions: Students at 2- and 4-year colleges have different expectations of their institutions; by making resources and referrals for sexual health available, colleges can better serve their students, which will result in improved health outcomes.     

The Slope of Change: An Environmental Management Approach to Reduce Drinking on a Day of Celebration at a US College

Abstract

Objective: This research extends the literature on event-specific environmental management with a case study evaluation of an intervention designed to reduce student drinking at a university's year-end celebration. Participants: Cornell University undergraduates were surveyed each May from 2001 through 2009. Sample sizes ranged from 322 to 1,973. Methods: Randomly sampled surveys were conducted after a large, annual spring campus celebration. An environmental management plan was initiated in 2003 that included increased enforcement of the minimum legal drinking age (MLDA) law. Results: In the short term, drinking at the campus celebration decreased while drinking before the event increased. Over time, the intervention significantly reduced high-risk drinking on the day of the event, especially among those under the age of 21. Conclusion: These findings are contrary to the argument that enforcement of MLDA laws simply leads to increased high-risk drinking, and therefore have implications for how colleges approach the challenge of student alcohol misuse.     

Energy Drinks,Weight Loss,and Disordered Eating Behaviors

Abstract

Objective: The present study examined energy drink consumption and relations with weight loss attempts and behaviors, body image, and eating disorders. Participants/Methods: This is a secondary analysis using data from 856 undergraduate students who completed the American College Health Association–National College Health Assessment II confidentially online during February 2012. Results: This study revealed that the majority reported lifetime consumption of energy drinks (68.4%) and a substantial minority (30.2%) reported past-30-day consumption. Chi-square and t test results suggest that consumption is associated with concerns about personal appearance, weight loss attempts, and disordered eating behaviors (eg, vomiting). Hierarchical logistic regressions revealed that after controlling for demographics, the relations between energy drink consumption and the act of trying to lose weight, the use of diet pills, and the use of vomiting/laxatives remained significant. Conclusions: The current findings suggest that energy drink consumption is associated with weight loss attempts, poor body image, and unhealthy weight loss behaviors. Future research should examine the prevalence of energy drink consumption for the purpose of weight loss.     

Overloaded and overlooked: Improving resident advisors' self-care

ABSTRACT

Objective: The purpose of this viewpoint is to discuss the lack of research on resident advisor (RA) self-care and how behavioral interventions can be used in housing programs to educate and improve RA self-care. It is essential for live-in housing staff (both professional and paraprofessional) to learn how to develop appropriate strategies that target problem behaviors to improve self-care. An overview of the RA position, the effects of increased demands (i.e., burnout), and the research on self-care behavioral interventions are discussed. Lastly, the call to use behavioral interventions within housing programs to educate RAs on self-care awareness and improve and monitor their health behaviors to prevent burnout and psychological distress is provided.     

The Use of Cervical Caps at the University of California/Berkeley

Abstract

The higher rates of disease and death associated with male gender have been widely documented, yet little is being done in the college health setting to address men's health issues. Many of men's health risks are related to social isolation and prohibitions on showing weakness. The authors describe the Virginia Tech University experience with 3 Man Alive groups that were developed to (a) create a supportive social structure for male college students who may otherwise be socially isolated, (b) model healthy expression of emotions, such as anger, fear, sadness, and joy; (c) create a safe space for men to discuss sensitive issues, such as relationships with significant others, sexuality, and substance abuse.     

A Disillusioned College Professor

In this article, the author discusses the double-bind situation of being an educator in a college setting, but reluctant to disclose that which could enlighten her social work students the most—at 14 years old she experienced a complete psychotic break (catatonic-type), but completely recovered within a few months and largely without medication. Here the author acknowledges the shameful nature of contemporary controversial issues in mental health some 37 years after her own experience and includes an excerpt from “An Absence of Concern,” a work in progress, to illustrate the dynamic inner processes that remain intact during a break, but largely denied by an ignorant society.