The Impact of Weight on Quality of Life Questionnaire
Obesity is a complex disease with a multifactorial etiology that is reaching epidemic proportions worldwide. Assessments are needed to adequately capture the decrements in health and psychosocial well-being that are so often observed in obese individuals
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Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210
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Why Develop Quality of Life Measures in Obesity? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211
3 IWQOL and IWQOL-Lite Development and Psychometric Properties . . . . . . . . . . . 212 3.1 IWQOL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212 3.2 IWQOL-Lite . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213 4
IWQOL in Comparison with Other Obesity-Specific Instruments . . . . . . . . . . . . . . . . 217
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IWQOL and Weight Loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218
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IWQOL Among Subgroups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220
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Conclusion and Future Directions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221
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Information on Use of the IWQOL-Lite . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 224 Summary Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 224
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Springer Science+Business Media LLC 2010 (USA)
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The Impact of Weight on Quality of Life Questionnaire
Abstract: Obesity is a complex disease with a multifactorial etiology that is reaching epidemic proportions worldwide. Assessments are needed to adequately capture the decrements in health and psychosocial well-being that are so often observed in > obese individuals. Accordingly, researchers are realizing the importance of quality of life as a measure of health status and weight loss treatment outcome in obese individuals. While weight loss is the primary outcome of interest for most obesity treatments, measuring quality of life is a vital component as individuals evaluate their treatment outcome. The Impact of Weight on Quality of Life (IWQOL) questionnaire is the first questionnaire developed to specifically assess the effects of obesity on health-related quality of life. The psychometric properties of the IWQOL are excellent, but given its length, a briefer version was developed, the Impact of Weight on Quality of Life-Lite Questionnaire (IWQOL-Lite). The five identified scales (Physical Function, Self-Esteem, Sexual Life, Public Distress, and Work) and the Total score have demonstrated excellent > reliability (0.90–0.94 for the scales, 0.96 for Total score), > validity, and utility with various groups of obese individuals. In this chapter, the rationale for the development of an obese-specific quality of life measure will be briefly reviewed, followed by the background and development of the IWQOL a
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