Differences in Methods for Olfactory Evaluation in Postoperative Eosinophilic Chronic Rhinosinusitis

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  • 好酸球性副鼻腔炎術後の嗅覚評価法による相違性

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Abstract

<p>A T&T olfactometer (T&T) is commonly used as a standard olfactory test in Japan. An open essence (OE) test and the self-administered odor questionnaire (SAOQ) are also used in olfactory clinics, and are reported to be highly correlated with T&T results. We evaluated the correlation between each test performed before and 3 months after surgery in 105 patients with eosinophilic chronic rhinosinusitis (ECRS) who underwent surgical treatment. There were strong correlations between average T&T recognition thresholds and OE and SAOQ results. Criteria for improvement of olfactory dysfunction using OE and SAOQ were determined based on Japanese Rhinologic Society criteria for T&T. OE and SAOQ tended to classify more cases as cured and fewer in remission compared to T&T. The rates of improvement were 71.4% for T&T, 69.7% for OE, and 62.2% for SAOQ when cases were divided into cured/remission (improvement) and no change/aggravation (no improvement). The discrepancy rates for these classifications were 16.2% between T&T and OE, and 23.5% between T&T and SAOQ. These results indicate that the patient’s subjective evaluation and T&T results for the therapeutic effect may differ in some cases. This suggests the need to conduct an identification test to evaluate postoperative olfactory improvement.</p>

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