Transoceanic pathogen transfer in the age of sail and steam.

In the centuries following Christopher Columbus's 1492 voyage to the Americas, transoceanic travel opened unprecedented pathways in global pathogen circulation. Yet no biological transfer is a single, discrete event. We use mathematical modeling to quantify historical risk of shipborne pathogen introduction, exploring the respective contributions of journey time, ship size, population susceptibility, transmission intensity, density dependence, and pathogen biology.

Using cognitive load theory to develop an emergency airway management curriculum: the Queen's University Mastery Airway Course (QUMAC).

Emergency airway management requires the simultaneous coordination of clinical reasoning and therapeutic interventions in the complex and time-sensitive setting of emergency resuscitation. The cognitive demand associated with these situations is invariably high and must be taken into consideration when designing training programs for this core professional competency. The four-component instructional design model (4C/ID), based on cognitive load theory, was used to develop a 1-year longitudinal airway management curriculum for Emergency Medicine residents.

Healthy Schools-Healthy Kids: a controlled evaluation of a comprehensive universal eating disorder prevention program.

This study was a controlled evaluation of a comprehensive school-based universal prevention program involving male and female students, parents, teachers, school administrators and local public health professionals. A total of 982 male and female Grades 6 and 7 middle school students (and 91 teachers/school administrators) completed self-report surveys at baseline on measures of body satisfaction, internalization of media ideals, size acceptance, disordered eating, weight-based teasing, weight loss and muscle-gaining behaviours, and perceptions of school climate (teachers only). Eighty-four percent of the students repeated the surveys immediately following the 8-month school-wide intervention and 71% again 6 months later.

Replication of a peer support program designed to prevent disordered eating: is a life skills approach sufficient for all middle school students?

The evaluation of a school-based peer support group previously shown to improve body esteem and global self-esteem and reduce dieting in young adolescent girls was replicated in the present study. A total of 282 girls in grades 7 and 8, 196 of whom were in the control group, completed self-report questionnaires immediately before and after the life skills intervention, and 3 months later. Contrary to the findings reported in the original study, participation in the 10-session peer support group did not lead to improvements in body esteem or eating attitudes and behaviors beyond what was experienced by the control group.

School-based peer support groups: a new approach to the prevention of disordered eating.

The goal of the present study was to evaluate the effectiveness of a school-based peer support group designed to improve body esteem and global self-esteem and to reduce negative eating attitudes and behaviors. A total of 214 girls in grades 7 and 8, 115 of whom were in the control group, completed self-report questionnaires immediately before and following the intervention, and three months later. The findings revealed that participation in the 10-session group, facilitated by public health nurses, led to increases in weight-related esteem and decreases in dieting.

The impact of childhood sexual abuse in anorexia nervosa.

Objective: The aim of this study was to examine the impact of childhood sexual abuse (CSA) on clinical characteristics and premature termination of treatment in anorexia nervosa (AN).

Method: The participants were 77 consecutive patients with AN admitted to an inpatient eating disorders unit. The patients were assessed in terms of eating disorder symptoms, general psychopathology, and CSA history at admission to hospital.

Female adolescents with anorexia nervosa and their parents: a case-control study of exercise attitudes and behaviours.

Background: Few studies of physical activity in patients with anorexia nervosa (AN) have included a suitable control group. Nor has such research considered the influence of parents' activity on that of their children. Our first prediction was that adolescents with AN would be significantly more active than healthy controls both prior to, and during, the progression of their disorder.

Predictors of premature termination of inpatient treatment for anorexia nervosa.

Objective: The authors examined predictors of premature dropout from a voluntary specialized inpatient treatment program for anorexia nervosa.

Method: One hundred sixty-six consecutive patients with anorexia nervosa received an admission assessment that consisted of a diagnostic interview and psychometric measures of core eating pathology and associated psychopathology. Survival analysis was used to examine the rate, timing, and prediction of dropout.

Correlates of weight loss and muscle-gaining behavior in 10- to 14-year-old males and females.

Background: This study examined the influence of appearance and social acceptance esteem, awareness and internalization of media stereotypes, body size acceptance, and teasing on the weight loss and muscle-gaining behaviors of 10- to 14-year-old boys and girls.

Methods: Male (n = 670) and female (n = 788) students were drawn from one of four public senior middle schools (grades 6-8) in Southern Ontario as part of a longitudinal outcome-based study. Students' baseline self-report questionnaires, measuring the above variables, were analyzed for the purposes of this study.

Dieting among preadolescent and young adolescent females.

We examined the prevalence of dieting and negative eating attitudes among 2279 females (aged 10-14 years) in southern Ontario. Self-report questionnaires revealed that 29.3% of the girls were currently trying to lose weight and 10.

Looking good-family focus on appearance and the risk for eating disorders.

Objective: Evidence suggests that eating-disordered families are overly concerned with social appearance and physical attractiveness. However, some argue that parental values are not sufficient to produce disordered eating in their offspring unless combined with certain third-factor effects of the child such as a psychological or biologic vulnerability. We tested this hypothesis by predicting that proneness to anxiety (neuroticism) and a family appearance focus would relate interactively (after controlling for body size) to a measure of weight preoccupation.

Factors affecting performance on a target monitoring task employing an automatic tracker.

The experiments in this paper examined the extent to which performance on a task employing an automatic tracker was similar to performance on tasks employing other types of automation that have been studied more extensively. Automated target tracking is being used in many sensor and navigation systems to improve performance and help the operator cope with increased data loads. With many automated systems these goals are not met.