Attitudinal correlates associated with recent alcohol use and episodic heavy drinking among African American youth

African–American students in 7th–12th grades completed the PRIDE survey examining attitudinal correlates associated with recent alcohol use and heavy episodic drinking. Of participants, 13.6% reported using alcohol in the past 30 days and 5.1% reported frequent heavy episodic drinking. Logistic regression analyses indicate that male, in high school and employed increased the odds of engaging in recent use and frequent heavy episodic drinking. Perceived harm and parent/peer disapproval of substance use was negatively associated with use. Results may assist professionals in developing prevention programs for African-American youth.     

Veterans’ Use of Programs and Services as They Transition to Civilian Life: Baseline Assessment for the Veteran Metrics Initiative

Abstract

A substantial minority of veterans struggle as they reintegrate into civilian life, reporting problems with vocational attainment, legal/financial/housing challenges, physical and mental health conditions, and social/interpersonal issues. While there are thousands of programs and services offered to veterans, little is known about which ones they use. In the current exploratory study, veterans separated from active duty in the prior three-months (48,965) were invited to complete a survey. Two primary questions were addressed: What programs/services did veterans use to assist in their reintegration to civilian life? What specific components/attributes of those programs did veterans report using? A total of 9566 veterans completed the survey. Approximately, two-thirds of veterans used at least one program to enhance their well-being, while one-third reported using multiple programs across multiple domains. Veterans primarily sought assistance for employment and educational advancement. Fewer veterans sought assistance for legal/financial/housing, health, and social functioning challenges. Social service providers and policy makers should be aware of the resources veterans use as they reintegrate into civilian life. Future research should examine factors that predict the use and nonuse of veteran reintegration programs, how use changes over time, and what factors predict program/service use, particularly among veterans at risk for poor transition outcomes.     

Seme distributions and their implications for an internal pilot study with a univariate linear model

In planning a study, the choice of sample size may depend on a variance value based on speculation or obtained from an earlier study. Scientists may wish to use an internal pilot design to protect themselves against an incorrect choice of variance. Such a design involves collecting a portion of the originally planned sample and using it to produce a new variance estimate. This leads to a new power analysis and increasing or decreasing sample size. For any general linear univariate model, with fixed predictors and Gaussian errors, we prove that the uncorrected fixed sample F-statistic is the likelihood ratio test statistic. However, the statistic does not follow an F distribution. Ignoring the discrepancy may inflate test size. We derive and evaluate properties of the components of the likelihood ratio test statistic in order to characterize and quantify the bias. Most notably, the fixed sample size variance estimate becomes biased downward. The bias may inflate test size for any hypothesis test, even if the parameter being tested was not involved in the sample size re-estimation. Furthermore, using fixed sample size methods may create biased confidence intervals for secondary parameters and the variance estimate.     

Interaction Ritual Chains and the Mobilization of Conscientious Consumers

Markets for “socially responsible” products are comprised of activists who lead protests, organize boycotts, and promote the consumption of these goods. However, the ultimate success of these movements is dependent upon the support of a large number of consumers whose self-professed values often contradict with their own purchasing patterns. Consumer support of socially responsible products cannot be explained by consumer culture theories, which privilege identity, attitudes, and behavior, or mass consumption theories, which emphasize location and advertising’s influence on consumption patterns. These perspectives are informative but unable to explain why some consumers will only buy socially responsible products while others with similar value systems possess much more contradictory consumption patterns. I extend Collin’s theory of “Interaction Ritual chains” to show that rituals and emotions—more than identity or coercive advertising—explain how ethical consumers are mobilized. I show how face-to-face interactions between consumers and producers produce solidarity and motivate support for the Fair Trade movement. This paper employs a micro-sociological approach to contribute to studies of ethical consumption in three notable ways: 1) it emphasizes the importance of “contexts” and is able to explain contradictions in consumer behavior; 2), it contributes to our understanding of “brand communities” by describing the micro-sociological processes that both help to build these communities and create value within the products that organize these groups; and 3) it offers the potential to develop a predictive model for the purchasing patterns of consumers.     

Two-Step Hypothesis Testing When the Number of Variables Exceeds the Sample Size

Medical images and genetic assays typically generate data with more variables than subjects. Scientists may use a two-step approach for testing hypotheses about Gaussian mean vectors. In the first step, principal components analysis (PCA) selects a set of sample components fewer in number than the sample size. In the second step, applying classical multivariate analysis of variance (MANOVA) methods to the reduced set of variables provides the desired hypothesis tests. Simulation results presented here indicate that success of the PCA in the first step requires nearly all variation to occur in population components far fewer in number than the number of subjects. In the second step, multivariate tests fail to attain reasonable power except in restrictive, favorable cases. The results encourage using other approaches discussed in the article to provide dependable hypothesis testing with high dimension, low sample size data (HDLSS).     

An analysis of well-being in retirement: The role of pensions,health, and ‘voluntariness’ of retirement

This paper examines a wide range of determinants of retiree well-being of retirees. Using data from the 2000 Health and Retirement Study, increases in economic factors such as income lead to higher well-being, although relative income has a larger effect than absolute income. The strongest predictors are the voluntariness of entering retirement, pension characteristics, and health. Retirees “forced” to retire or have defined contribution pensions or bad health have significantly lower well-being. The results suggest a more nuanced approach in addressing retiree well-being than just a focus on the economic well-being of retirees.     

Balance dysfunction and falls in people with lower limb arthritis: factors contributing to risk and effectiveness of exercise interventions

Chronic musculoskeletal conditions in the lower extremities, particularly arthritis, and the chronic pain associated with them, are independent risk factors for falls, with approximately 50% of people with arthritis reporting one or more falls. Despite this, few studies have specifically addressed balance dysfunction, falls risk and falls incidence in people with arthritis. This review aimed to identify potential factors contributing to the increased risk of falls in people with lower limb osteoarthritis or rheumatoid arthritis and to summarise the evidence base for effective exercise interventions targeted to reduce their risk of falls. A systematic search of the literature was conducted in February 2010 and included the following databases: MEDLINE (Ovid), EMBASE, Cumulative Index to Nursing and Allied Health Literature, Allied and Complementary Medicine, Cochrane Library and PsycINFO. Only three studies that investigated exercise programmes for people with lower limb arthritis met all inclusion criteria, but none used falls as an outcome measure. To broaden the review, systematic reviews that assessed the effectiveness of exercise interventions for fall prevention in older people were also included. The presence of any form of lower limb arthritis and the associated consequences including pain, balance impairment, reduced muscle strength and reduced function are all associated with increased risk of falling. Due to the link between musculoskeletal pain and the increased risk of falls, further research needs to investigate which type of exercise programme will be effective in reducing the risk of falls in populations with arthritis in the lower limbs.