| Summary: | 博士 === 國立政治大學 === 心理學研究所 === 102 === Health-related quality of life (HRQoL) is increasingly recognized as being subjective, which emphasized patient-reported outcomes. Many HRQoL studies reported that people with serious illness perceived no less quality of life (QoL) than those without such illness. This phenomenon is labeled as disability paradox. Response shift theory provides an explanation for it and refers to a change in the meaning of one’s self-evaluation of QoL as a result of changes in internal standards (recalibration), values (reprioritization), and reconceptualization of QoL. It is these changes that will influenced perceived QoL. Current methods to detect Response Shift are still evolving.
SEIQoL-DW (Schedule for the Evaluation of Individual Quality of Life- direct weighting) is one of individualized QoL instruments and measures three elements of QoL, including five important aspects of life, current satisfaction with each aspect, and relative importance of each aspect. Many researchers tried to use SEIQoL-DW to detect response shift. Changes in the content of aspects of life between two time points reflect reconceptualization. Changes in the relative weighting between two time points reflect reprioritization. Recalibration is measured by then test, which is a method by asking respondents at time two to provide a renewed rating of their aspects of life given at time one. However, there are no consensus operational definition of indices of reconceptualization , reprioritization, and recalibration. The examination between indices and improvements in QoL was not significant, either. Besides, then test with SEIQoL-DW has a disadvantage when aspects nominated between time one and two are different. This study tried to resolve issues above. If these issues are resolved, disability paradox will be explained. Response Shift will possibly differentiate patients of various disease, and provide ideas to help patients adjust to illness.
85 patients were recruited, including those with renal disease stage 3-5, and those undergoing hemodialysis or peritoneal dialysis within one year. All patients completed SEIQoL-DW, ideal scale, Satisfaction with Life Scale, the Positive And Negative Affect Scale at time one and three months after , except questionnaire on personal background and biological information (at time one) and then test (at time two). Results indicated that the QoLs of these three groups of patients showed no different, which confirmed disability paradox. Only recalibration showed helpful. Regression analyses also showed that recalibration indices were better predictors in QoLs.
For End-stage Renal Disease patients, higher expectation suggested higher QoL improvement. Further analysis showed that patients would abandon lower-weighted aspect of life. Compared to the abandoned aspects, higher satisfaction, expectation and weighting were seen in new-nominated aspect. This finding could be useful in helping patients adjust. Although then test also reached significance, evidences was contradicted to its prediction. More research is needed in the future.
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