Article
Is there a response shift in quality of life assessment after tympanoplasty?
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Published: | July 23, 2012 |
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Background: The response shift - effect leads to a reassessment of therapeutic experiences of pretreatment quality of life. Thereby, it also leads to a change of treatment effect compared to the sole pre- versus post-therapeutic quality of life measurement. We wanted to verify whether there is a relevant response shift in quality of life ratings after tympanoplasty.
Patients and Methods: In this prospective study, 90 patients with chronic otitis media which were treated with tympanoplasty were enrolled. By means of the Chronic Otitis media Outcome Test 15 (COMOT-15), preoperative quality of life was assessed preoperatively (pre-test) and 1 year postoperatively (then-test). Wilcoxon test was used for statistical analysis.
Results: There were only small shift response effects without apparent significance. However, all the answers in the then-test showed a slightly worse preoperative quality of life compared with in the pre-test.
Discussion and Conclusions: The improvement of quality from post-operative view of life was related to pre-operative quality of life. Due to the resulting revaluation of preoperative health status, there was a set point adjustment and ultimately trend to poorer preoperative assessment of quality of life in the then-test. Interventions with probably a greater effect on quality of life (e.g. cochlear implant) probably have a great shift response - potential that should be considered in evaluating the results in the future.