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How does the PorQOL theory differ from other models of health-related quality of life? 


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The PorQOL theory, proposed by Ferrans and colleagues, differs from other models of health-related quality of life (HRQoL) in its comprehensive nature and theoretical foundation, as highlighted in Context_1 and Context_3. The PorQOL theory encompasses multidimensional constructs that align with the holistic spectrum of care, making it a valuable predictor in nursing research and practice. It maintains consistency with the nursing metaparadigm and includes all relevant concepts and propositions, emphasizing the importance of defining variables associated with each concept for empirical and pragmatic adequacy. In contrast, other models may not offer the same level of detail or alignment with nursing principles. This distinction underscores the PorQOL theory's significance in capturing the complexity of HRQoL for a more thorough understanding and application in healthcare settings.

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The PorQOL theory, based on item response theory, directly estimates HRQoL from raw data, unlike classical models like linear mixed models that use HRQoL scores as representations.

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