Bunk Bed Injuries in College Students

Abstract

We surveyed 1,431 college seniors to investigate the frequency and severity of injury after falls from bed. This data was analyzed along with data obtained from both the Consumer Product Safety Commission and the armed forces. We found that falls from bed are common in young adults and that injuries are more likely to occur with falls from bunk or loft beds than from standard beds (p = 0.025). Falls were most common when students were climbing out of bed or were startled awake. Alcohol use was implicated in 36% of the falls. We recommend that the heights of nonstandard beds for students be lowered, that alarms and phones be placed within easy reach, and that sturdy, fixed devices be used to descend. Intoxicated individuals should be placed on standard beds or lower.     

A comparison of tests of homogeneity for sparse contingency tables

Five tests of homogeneity for a 2x(k+l) contingency table are compared using Monte Carlo techniques. For these studiesit is assumed that k becomes large in such a way that thecontingency table is sparse for 2xk of the cells, but the sample size in two of the cells remains large. The test statistics studied are: the chi-square approximation to the Pearson test statistic, the chi-square approximation to the likelihood ratio statistic, the normal approximation to Zelterman's (1984)the normal approximation to Pearson's chi-square, and the normal approximation to the likelihood ratio statistic. For the range of parameters studied the chi-square approximation to Pearson's statistic performs consistently well with regard to its size and power.     

Policy deployment: A case study analysis

Theaim of theresearch reported in thispaper wasto examine policy deployment in a business unit of the UK company operation of a major corporation, considered a world leader in business improvement. In this study, the application of policy deployment at an operational level was investigated to determine how managers deploy and manage direction, and assess the effectiveness of the catchball process. In the business unit studied, policy deployment could have a greater impact. For example, in deploying direction, cascade and catchball is used, however, the leadership, checks, control and communication elements could be more effective, and the respective shortcomings are described. A generic catch-reflect-improvescrutinize-pass (CRISP) approach to policy deployment is proposed by which vision, mission, goals, objectives, targets and means can be more effectively deployed.     

A Bayesian View of Nominal Money and Real Output Through a New Classical Macroeconomic Window

This study investigates the empirical evidence on the effects of unanticipated changes in nominal money on real output in 47 countries when viewed through a window (i.e., likelihood function) that assumes the neutrality of anticipated changes. Using a Bayesian predictivist approach, it provides a pedagogical Bayesian analysis of generated regressor models in the face of specification uncertainty involving, among other things, multiple unit roots and trend stationary alternatives.     

Social Well-Being in Northern Ireland: A Longitudinal Study 1958–1998

This paper examines the question of how social well-being, or quality of life, in Northern Ireland has changed through time from 1958 to 1998. After reviewing major economic trends and governmental policy affecting the region, we develop an overall measure of quality of life based on previous research into social well-being in Northern Ireland. We find that the ‘Troubles’ clearly impact the quality of life in Northern Ireland but not necessarily as broadly as one might suspect. The majority of the sixteen underlying indicators used for creating a measure of social well-being remain largely unaffected by the conflict and closely track increases in overall United Kingdom Gross Domestic Product. The remaining five measures of social well-being are significantly impacted by the conflict. The resulting measures of social well-being and some suggested uses for future research are then presented.     

Estimation of river and stream temperature trends under haphazard sampling

Long-term temporal trends in water temperature in rivers and streams are typically estimated under the assumption of evenly-spaced space-time measurements. However, sampling times and dates associated with historical water temperature datasets and some sampling designs may be haphazard. As a result, trends in temperature may be confounded with trends in time or space of sampling which, in turn, may yield biased trend estimators and thus unreliable conclusions. We address this concern using multilevel (hierarchical) linear models, where time effects are allowed to vary randomly by day and date effects by year. We evaluate the proposed approach by Monte Carlo simulations with imbalance, sparse data and confounding by trend in time and date of sampling. Simulation results indicate unbiased trend estimators while results from a case study of temperature data from the Illinois River, USA conform to river thermal assumptions. We also propose a new nonparametric bootstrap inference on multilevel models that allows for a relatively flexible and distribution-free quantification of uncertainties. The proposed multilevel modeling approach may be elaborated to accommodate nonlinearities within days and years when sampling times or dates typically span temperature extremes.     

Human Interindividual Variability in Parameters Related to Health Risks

This paper reviews existing data on the variability in parameters relevant for health risk analyses. We cover both exposure-related parameters and parameters related to individual susceptibility to toxicity. The toxicity/susceptibility data base under construction is part of a longer term research effort to lay the groundwork for quantitative distributional analyses of non-cancer toxic risks. These data are broken down into a variety of parameter types that encompass different portions of the pathway from external exposure to the production of biological responses. The discrete steps in this pathway, as we now conceive them, are:Contact Rate (Breathing rates per body weight; fish consumption per body weight)Uptake or Absorption as a Fraction of Intake or Contact RateGeneral Systemic Availability Net of First Pass Elimination and Dilution via Distribution Volume (e.g., initial blood concentration per mg/kg of uptake)Systemic Elimination (half life or clearance)Active Site Concentration per Systemic Blood or Plasma ConcentrationPhysiological Parameter Change per Active Site Concentration (expressed as the dose required to make a given percentage change in different people, or the dose required to achieve some proportion of an individual's maximum response to the drug or toxicant)Functional Reserve Capacity–Change in Baseline Physiological Parameter Needed to Produce a Biological Response or Pass a Criterion of Abnormal FunctionComparison of the amounts of variability observed for the different parameter types suggests that appreciable variability is associated with the final step in the process–differences among people in functional reserve capacity. This has the implication that relevant information for estimating effective toxic susceptibility distributions may be gleaned by direct studies of the population distributions of key physiological parameters in people that are not exposed to the environmental and occupational toxicants that are thought to perturb those parameters. This is illustrated with some recent observations of the population distributions of Low Density Lipoprotein Cholesterol from the second and third National Health and Nutrition Examination Surveys.     

Basic Reading Through Dance program. The impact on first-grade students' basic reading skills

This study evaluates the effectiveness of an arts-based educational program, Basic Reading Through Dance. Basic Reading Through Dance is a 20-session, curriculum-based reading intervention for first-grade students developed by Whirlwind, a not-for-profit organization. There were a total of 721 first-grade students from Chicago public schools who participated in the study, with 328 students from 6 schools receiving the program and 393 students from 9 schools serving as controls. The program was designed to improve reading skills, as assessed by the PhonoGraphix Test, such as code knowledge (alphabet sounds) and phoneme segmentation (separating letter sounds within spoken words). Results suggest that the students who participated in the program improved significantly more than control students on all reading skills that were assessed.     

The superstore format in Australia: Opportunities and limitations

This article outlines the development of both food superstores and non-food superstores (referred to as category killers) in Australia. Ten retail categories have been identified where there is a moderate to high rate of adoption of the superstore format (more than 20 outlets). These ten categories have been analyzed to identify the success factors in superstore development, which include accurate assessment of consumer one-stop shopping needs, sufficient finance, good store design skills and a balanced program of store expansion. The article explores the managerial implications for traditional retailers, for existing superstore retailers (especially the issue of optimal store size), for existing convenience store operators, department stores and for manufacturers and wholesalers. There are limitations of the superstore format in categories which are fashion orientated or where consumers require close distance convenience. These limitations actually provide opportunities to a myriad of retailers in fast food, dry-cleaning, banking, florists and the like, to reassess their locational and service delivery strategies. The superstore concept is clearly a revolution in itself, but its shock waves are provoking and stimulating second order mini-revolutions in traditional specialist stores, department stores, convenience stores, warehousing and manufacturing.