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Using Multivariate Statistics

Ten per cent of the world’s school-aged children are estimated to be carrying excess body fat (Fig. 1), with an increased risk for developing chronic disease. Of these overweight children, a quarter are obese, with a significant likelihood of some having multiple risk factors for type 2 diabetes, heart disease and a variety of other co-morbidities before or during early adulthood. The prevalence of overweight is dramatically higher in economically developed regions, but is rising significantly in most parts of the world. In many countries the problem of childhood obesity is worsening at a dramatic rate. Surveys during the 1990s show that in Brazil and the USA, an additional 0.5% of the entire child population became overweight each year. In Canada, Australia and parts of Europe the rates were higher, with an additional 1% of all children becoming overweight each year. The burden upon the health services cannot yet be estimated. Although childhood obesity brings a number of additional problems in its train – hyperinsulinaemia, poor glucose tolerance and a raised risk of type 2 diabetes, hypertension, sleep apnoea, social exclusion and depression – the greatest health problems will be seen in the next generation of adults as the present childhood obesity epidemic passes through to adulthood. Greatly increased rates of heart disease, diabetes, certain cancers, gall bladder disease, osteoarthritis, endocrine disorders and other obesityrelated conditions will be found in young adult populations, and their need for medical treatment may last for their remaining life-times. The costs to the health services, the losses to society and the burdens carried by the individuals involved will be great. The present report has been written to focus attention on the issue and to urge policy-makers to consider taking action before it is too late. Specifically, the report:

https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1467-789X.2004.00133.x

Obesity in children and young people: a crisis in public health.

The detection of psychiatric illness by questionnaire

Background. In recent years the 12-item General Health Questionnaire (GHQ-12) has been extensively used as a short screening instrument, producing results that are comparable to longer versions of the GHQ.Methods. The validity of the GHQ-12 was compared with the GHQ-28 in a World Health Organization study of psychological disorders in general health care. Results are presented for 5438 patients interviewed in 15 centres using the primary care version of the Composite International Diagnostic Instrument, or CIDI-PC.Results. Results were uniformly good, with the average area under the ROC curve 88, range from 83 to 95. Minor variations in the criteria used for defining a case made little difference to the validity of the GHQ, and complex scoring methods offered no advantages over simpler ones. The GHQ was translated into 10 other languages for the purposes of this study, and validity coefficients were almost as high as in the original language. There was no tendency for the GHQ to work less efficiently in developing countries. Finally gender, age and educational level are shown to have no significant effect on the validity of the GHQ.Conclusions. If investigators wish to use a screening instrument as a case detector, the shorter GHQ is remarkably robust and works as well as the longer instrument. The latter should only be preferred if there is an interest in the scaled scores provided in addition to the total score.

https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033291796004242

The validity of two versions of the GHQ in the WHO study of mental illness in general health care

Statistical Analysis with Missing Data

Body image across the adult life span: stability and change.

This study aimed to investigate women's body image across the entire life span from within the theoretical perspective provided by objectification theory (B. L. Fredrickson & T.-A. Roberts, 1997). In a cross-sectional study, a sample of 322 women ranging in age from 20 to 84 years completed a questionnaire measuring body dissatisfaction, self-objectification, and its proposed consequences. Although body dissatisfaction remained stable across the age range, self-objectification, habitual body monitoring, appearance anxiety, and disordered eating symptomatology all significantly decreased with age. Self-objectification was found to mediate the relationship between age and disordered eating symptomatology. It was concluded that objectification theory helps clarify the processes involved in the changes in body image that occur with age.

Body image across the life span in adult women: The role of self-objectification.

A systematic review of the impact of the use of social networking sites on body image and disordered eating outcomes

This study aimed to investigate the role of social comparison processes in women's responses to images of thin-idealized female beauty. A sample of 126 women viewed magazine advertisements containing full-body, body part, or product images. Instructional set was also manipulated with three levels: control, appearance focus, and social comparison. Mood and body dissatisfaction were measured immediately before and after advertisement viewing, while state weight anxiety and the amount of appearance comparison engaged in were measured only after the advertisements. It was found that exposure to either body part or full body images led to increased negative mood and body dissatisfaction, while the amount of comparison processing was affected by both image type and instructional set. Importantly, regression analyses showed that the effects of image type on mood and body dissatisfaction were mediated by the amount of social comparison reported. It was concluded that the processing in which women engage ...

/pdf/the-role-of-social-comparison-in-the-effect-of-magazine-35wj8z1vbg.pdf

Marika Tiggemann

Papers

Body image across the adult life span: stability and change.

Body image across the life span in adult women: The role of self-objectification.

A systematic review of the impact of the use of social networking sites on body image and disordered eating outcomes

The Role of Social Comparison in the Effect of Magazine Advertisements on Women's Mood and Body Dissatisfaction

"Exercise to be fit, not skinny": The effect of fitspiration imagery on women's body image.